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Junye Wang - One of the best experts on this subject based on the ideXlab platform.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
Xinzhong Du - One of the best experts on this subject based on the ideXlab platform.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
Darren L. Ficklin - One of the best experts on this subject based on the ideXlab platform.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
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Development and application of a hydroclimatological stream Temperature Model within the Soil and Water Assessment Tool
Water Resources Research, 2012Co-Authors: Darren L. Ficklin, Yuzhou Luo, Iris T. Stewart, Edwin P. MaurerAbstract:[1] We develop a stream Temperature Model within the Soil and Water Assessment Tool (SWAT) that reflects the combined influence of meteorological (air Temperature) and hydrological conditions (streamflow, snowmelt, groundwater, surface runoff, and lateral soil flow) on water Temperature within a watershed. SWAT currently uses a linear air-stream Temperature relationship to determine stream Temperature, without consideration of watershed hydrology. As SWAT uses stream Temperature to Model various in-stream biological and water quality processes, an improvement of the stream Temperature Model will result in improved accuracy in Modeling these processes. The new stream Temperature Model is tested on seven coastal and mountainous streams throughout the western United States for which high quality flow and water Temperature data were available. The new routine does not require input data beyond that already supplied to the Model, can be calibrated with a limited number of calibration parameters, and achieves improved representation of observed daily stream Temperature. For the watersheds Modeled, the Nash-Sutcliffe (NS) coefficient and mean error (ME) for the new stream Temperature Model averaged 0.81 and −0.69°C, respectively, for the calibration period and 0.82 and −0.63°C for the validation period. The original SWAT stream Temperature Model averaged a NS of −0.27 and ME of 3.21°C for the calibration period and a NS of −0.26 and ME of 3.02°C for the validation period. Sensitivity analyses suggest that the new stream Temperature Model calibration parameters are physically reasonable and the Model is better able to capture stream Temperature changes resulting from changes in hydroclimatological conditions.
Narayan Kumar Shrestha - One of the best experts on this subject based on the ideXlab platform.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:<p><strong>Abstract.</strong> Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within SWAT Model considers hydrology and the impact of air Temperature in simulating the water-air heat transfer process. In this study we propose using the equilibrium Temperature approach to Model complex heat transfer processes at the water-air interface, which reflects the influences of air Temperature, solar radiation, wind speed and stream water depth on the heat transfer process. The thermal capacity of the streamflow is Modelled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two added parameters to Model the heat transfer processes. The equilibrium Temperature Model is applied and tested in the Athabasca River Basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB for which high-frequency observed stream Temperature data are available. The results indicate that the equilibrium Temperature Model provided better and more consistent performances for the different regions of the ARB with the values of Nash-Sutcliffe Efficiency (>&#8201;0.67) greater than those of the original SWAT Model and the hydroclimatological Model. Overall, the equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort, and has an overall better performance for the simulation of daily stream Temperatures. Thus, it can be used as an effective tool for predicting the change in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations and the equilibrium Temperature Model could be a potential tool to Model stream Temperature for water quality simulations.</p>
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Incorporation of the equilibrium Temperature approach in a Soil and Water Assessment Tool hydroclimatological stream Temperature Model
Hydrology and Earth System Sciences, 2017Co-Authors: Xinzhong Du, Narayan Kumar Shrestha, Darren L. Ficklin, Junye WangAbstract:Stream Temperature is an important indicator for biodiversity and sustainability in aquatic ecosystems. The stream Temperature Model currently in the Soil and Water Assessment Tool (SWAT) only considers the impact of air Temperature on stream Temperature, while the hydroclimatological stream Temperature Model developed within the SWAT Model considers hydrology and the impact of air Temperature in simulating the water–air heat transfer process. In this study, we modified the hydroclimatological Model by including the equilibrium Temperature approach to Model heat transfer processes at the water–air interface, which reflects the influences of air Temperature, solar radiation, wind speed and streamflow conditions on the heat transfer process. The thermal capacity of the streamflow is Modeled by the variation of the stream water depth. An advantage of this equilibrium Temperature Model is the simple parameterization, with only two parameters added to Model the heat transfer processes. The equilibrium Temperature Model proposed in this study is applied and tested in the Athabasca River basin (ARB) in Alberta, Canada. The Model is calibrated and validated at five stations throughout different parts of the ARB, where close to monthly samplings of stream Temperatures are available. The results indicate that the equilibrium Temperature Model proposed in this study provided better and more consistent performances for the different regions of the ARB with the values of the Nash–Sutcliffe Efficiency coefficient (NSE) greater than those of the original SWAT Model and the hydroclimatological Model. To test the Model performance for different hydrological and environmental conditions, the equilibrium Temperature Model was also applied to the North Fork Tolt River Watershed in Washington, United States. The results indicate a reasonable simulation of stream Temperature using the Model proposed in this study, with minimum relative error values compared to the other two Models. However, the NSE values were lower than those of the hydroclimatological Model, indicating that more Model verification needs to be done. The equilibrium Temperature Model uses existing SWAT meteorological data as input, can be calibrated using fewer parameters and less effort and has an overall better performance in stream Temperature simulation. Thus, it can be used as an effective tool for predicting the changes in stream Temperature regimes under varying hydrological and meteorological conditions. In addition, the impact of the stream Temperature simulations on chemical reaction rates and concentrations was tested. The results indicate that the improved performance of the stream Temperature simulation could significantly affect chemical reaction rates and the simulated concentrations, and the equilibrium Temperature Model could be a potential tool to Model stream Temperature in water quality simulations.
S. Uhlenbrook - One of the best experts on this subject based on the ideXlab platform.
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A distributed stream Temperature Model using high resolution Temperature observations
Hydrology and Earth System Sciences Discussions, 2007Co-Authors: M. C. Westhoff, H. H. G. Savenije, W. M. J . Luxemburg, G. S. Stelling, N. C. Van De Giesen, J. S. Selker, L. Pfister, S. UhlenbrookAbstract:Distributed Temperature data are used as input and as calibration data for an energy based Temperature Model of a first order stream in Luxembourg. A DTS (Distributed Temperature Sensing) system with a fiber optic cable of 1500 m was used to measure stream water Temperature with 1 m resolution each 2 min. Four groundwater inflows were identified and quantified (both Temperature and relative discharge). The Temperature Model calculates the total energy balance including solar radiation (with shading effects), longwave radiation, latent heat, sensible heat and river bed conduction. The simulated Temperature is compared with the observed Temperature at all points along the stream. Knowledge of the lateral inflow appears to be crucial to simulate the Temperature distribution and conversely, that stream Temperature can be used successfully to identify sources of lateral inflow. The DTS fiber optic is an excellent tool to provide this knowledge.
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A distributed stream Temperature Model using high resolution Temperature observations
Hydrology and Earth System Sciences Discussions, 2007Co-Authors: M. C. Westhoff, H. H. G. Savenije, W. M. J . Luxemburg, G. S. Stelling, N. C. Van De Giesen, J. S. Selker, L. Pfister, S. UhlenbrookAbstract:Highly distributed Temperature data are used as input and as calibration data for a Temperature Model of a first order stream in Luxembourg. A DTS (Distributed Temperature Sensing) fiber optic cable with a length of 1500 m is used to measure stream water Temperature with a spatial resolution of 0.5 m and a temporal resolution of 2 min. With the observations four groundwater inflows are found and quantified (both Temperature and relative discharge). They are used as input for the distributed Temperature Model presented here. The Model calculates the total energy balance including solar radiation (with shading effects), longwave radiation, latent heat, sensible heat and river bed conduction. The simulated Temperature along the whole stream is compared with the measured Temperature at all points along the stream. It shows that proper knowledge of the lateral inflow is crucial to simulate the Temperature distribution along the stream, and, the other way around stream Temperature can be used successfully to identify runoff components. The DTS fiber optic is an excellent tool to provide this knowledge.
