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Simone Fatichi - One of the best experts on this subject based on the ideXlab platform.
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Anthropogenic and Catchment Characteristic signatures in the water quality of Swiss rivers: a quantitative assessment
Hydrology and Earth System Sciences, 2019Co-Authors: Martina Botter, Paolo Burlando, Simone FatichiAbstract:Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the Catchment. We investigate long-term water quality data of 11 Swiss Catchments with the objective to discern the influence of major Catchment Characteristics and anthropic activities on delivery of solutes in stream water. Magnitude, trends, and seasonality of water quality samplings of different solutes are evaluated and compared across Catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify the solute behaviors. While the anthropogenic impacts are clearly detectable in the concentration of certain solutes (i.e., Na+ , Cl− , NO3 , DRP), the influence of single Catchment Characteristics such as geology (e.g., on Ca2+ and H4SiO4 ), topography (e.g., on DOC, TOC, and TP), and size (e.g., on DOC and TOC) is only sometimes visible, which is also because of the limited sample size and the spatial heterogeneity within Catchments. Solute variability in time is generally smaller than discharge variability and the most significant trends in time are due to temporal variations of anthropogenic rather than natural forcing. The majority of solutes show dilution with increasing discharge, especially geogenic species, while sediment-bonded solutes (e.g., total phosphorous and organic carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors affect the biogeochemical response of streams, and, while the majority of solutes show identifiable behaviors in individual Catchments, only a minority of behaviors can be generalized across the 11 Catchments that exhibit different natural, climatic, and anthropogenic features.
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Anthropogenic and Catchment Characteristic signatures in the water quality of Swiss rivers: a quantitative assessment
2018Co-Authors: Martina Botter, Paolo Burlando, Simone FatichiAbstract:Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the Catchment. We investigate long-term water quality data of eleven Swiss Catchments with the objective to discern the influence of Catchment Characteristics and anthropogenic activities on delivery of solutes in stream water. Magnitude, trends and seasonality of water quality samplings of different solutes are evaluated and compared across Catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify different solute behaviors. Although the influence of Catchment geology, morphology and size is sometime visible on in-stream solute concentrations, anthropogenic impacts are much more evident. Solute variability is generally smaller than discharge variability. The majority of solutes shows dilution with increasing discharge, especially geogenic species, while sediment-related solutes (e.g. Total Phosphorous and Organic Carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors impact the biogeochemical response of streams and, while the majority of solutes show identifiable behaviors in individual Catchments, only a minority of behaviors can be generalized across Catchments that exhibit different natural, climatic and anthropogenic features.
Martina Botter - One of the best experts on this subject based on the ideXlab platform.
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Anthropogenic and Catchment Characteristic signatures in the water quality of Swiss rivers: a quantitative assessment
Hydrology and Earth System Sciences, 2019Co-Authors: Martina Botter, Paolo Burlando, Simone FatichiAbstract:Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the Catchment. We investigate long-term water quality data of 11 Swiss Catchments with the objective to discern the influence of major Catchment Characteristics and anthropic activities on delivery of solutes in stream water. Magnitude, trends, and seasonality of water quality samplings of different solutes are evaluated and compared across Catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify the solute behaviors. While the anthropogenic impacts are clearly detectable in the concentration of certain solutes (i.e., Na+ , Cl− , NO3 , DRP), the influence of single Catchment Characteristics such as geology (e.g., on Ca2+ and H4SiO4 ), topography (e.g., on DOC, TOC, and TP), and size (e.g., on DOC and TOC) is only sometimes visible, which is also because of the limited sample size and the spatial heterogeneity within Catchments. Solute variability in time is generally smaller than discharge variability and the most significant trends in time are due to temporal variations of anthropogenic rather than natural forcing. The majority of solutes show dilution with increasing discharge, especially geogenic species, while sediment-bonded solutes (e.g., total phosphorous and organic carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors affect the biogeochemical response of streams, and, while the majority of solutes show identifiable behaviors in individual Catchments, only a minority of behaviors can be generalized across the 11 Catchments that exhibit different natural, climatic, and anthropogenic features.
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Anthropogenic and Catchment Characteristic signatures in the water quality of Swiss rivers: a quantitative assessment
2018Co-Authors: Martina Botter, Paolo Burlando, Simone FatichiAbstract:Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the Catchment. We investigate long-term water quality data of eleven Swiss Catchments with the objective to discern the influence of Catchment Characteristics and anthropogenic activities on delivery of solutes in stream water. Magnitude, trends and seasonality of water quality samplings of different solutes are evaluated and compared across Catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify different solute behaviors. Although the influence of Catchment geology, morphology and size is sometime visible on in-stream solute concentrations, anthropogenic impacts are much more evident. Solute variability is generally smaller than discharge variability. The majority of solutes shows dilution with increasing discharge, especially geogenic species, while sediment-related solutes (e.g. Total Phosphorous and Organic Carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors impact the biogeochemical response of streams and, while the majority of solutes show identifiable behaviors in individual Catchments, only a minority of behaviors can be generalized across Catchments that exhibit different natural, climatic and anthropogenic features.
Paolo Burlando - One of the best experts on this subject based on the ideXlab platform.
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Anthropogenic and Catchment Characteristic signatures in the water quality of Swiss rivers: a quantitative assessment
Hydrology and Earth System Sciences, 2019Co-Authors: Martina Botter, Paolo Burlando, Simone FatichiAbstract:Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the Catchment. We investigate long-term water quality data of 11 Swiss Catchments with the objective to discern the influence of major Catchment Characteristics and anthropic activities on delivery of solutes in stream water. Magnitude, trends, and seasonality of water quality samplings of different solutes are evaluated and compared across Catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify the solute behaviors. While the anthropogenic impacts are clearly detectable in the concentration of certain solutes (i.e., Na+ , Cl− , NO3 , DRP), the influence of single Catchment Characteristics such as geology (e.g., on Ca2+ and H4SiO4 ), topography (e.g., on DOC, TOC, and TP), and size (e.g., on DOC and TOC) is only sometimes visible, which is also because of the limited sample size and the spatial heterogeneity within Catchments. Solute variability in time is generally smaller than discharge variability and the most significant trends in time are due to temporal variations of anthropogenic rather than natural forcing. The majority of solutes show dilution with increasing discharge, especially geogenic species, while sediment-bonded solutes (e.g., total phosphorous and organic carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors affect the biogeochemical response of streams, and, while the majority of solutes show identifiable behaviors in individual Catchments, only a minority of behaviors can be generalized across the 11 Catchments that exhibit different natural, climatic, and anthropogenic features.
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Anthropogenic and Catchment Characteristic signatures in the water quality of Swiss rivers: a quantitative assessment
2018Co-Authors: Martina Botter, Paolo Burlando, Simone FatichiAbstract:Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the Catchment. We investigate long-term water quality data of eleven Swiss Catchments with the objective to discern the influence of Catchment Characteristics and anthropogenic activities on delivery of solutes in stream water. Magnitude, trends and seasonality of water quality samplings of different solutes are evaluated and compared across Catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify different solute behaviors. Although the influence of Catchment geology, morphology and size is sometime visible on in-stream solute concentrations, anthropogenic impacts are much more evident. Solute variability is generally smaller than discharge variability. The majority of solutes shows dilution with increasing discharge, especially geogenic species, while sediment-related solutes (e.g. Total Phosphorous and Organic Carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors impact the biogeochemical response of streams and, while the majority of solutes show identifiable behaviors in individual Catchments, only a minority of behaviors can be generalized across Catchments that exhibit different natural, climatic and anthropogenic features.
Hartanto I.m. - One of the best experts on this subject based on the ideXlab platform.
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Integrating Multiple Sources of Information for Improving Hydrological Modelling: an Ensemble Approach
CRC Press Balkema - Taylor & Francis Group, 2019Co-Authors: Hartanto I.m.Abstract:The availability of Earth observation (EO) and numerical weather prediction data for hydrological modelling and water management has increased significantly, creating a situation that today, for the same variable, estimates may be available from two or more sources of information. Precipitation data, for example, can be obtained from rain gauges, weather radar, satellites, or outputs from numerical weather models. Land use data can be obtained from land survey, satellite imagery, or a combination of the two. Each of these data sources provides an estimate of a Catchment Characteristic and related hydrological model parameters, or of a hydrometeorological variable. Estimates from each data source vary in magnitude or temporal and spatial variability. It is not alwayspossible to judge which data source is the most accurate. One data source may perform poorly in one situation but give an accurate estimate for another. Yet, in hydrological modelling, usually, a particular set of Catchment Characteristics and input data is selected, possibly ignoring other relevant data sources. One of the reasons may be that despite vast research and development efforts in integration methods for sub-sets of the available data sources, there is no comprehensive data-model integration framework assuming existence and enabling effective use of multiple data sources in hydrological modelling.The main objective of this thesis, therefore, is to develop such a data-model integration framework, and test it on a case study
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Integrating Multiple Sources of Information for Improving Hydrological Modelling: an Ensemble Approach
CRC Press Balkema - Taylor & Francis Group, 2019Co-Authors: Hartanto I.m.Abstract:The availability of Earth observation (EO) and numerical weather prediction data for hydrological modelling and water management has increased significantly, creating a situation that today, for the same variable, estimates may be available from two or more sources of information. Precipitation data, for example, can be obtained from rain gauges, weather radar, satellites, or outputs from numerical weather models. Land use data can be obtained from land survey, satellite imagery, or a combination of the two. Each of these data sources provides an estimate of a Catchment Characteristic and related hydrological model parameters, or of a hydrometeorological variable. Estimates from each data source vary in magnitude or temporal and spatial variability. It is not alwayspossible to judge which data source is the most accurate. One data source may perform poorly in one situation but give an accurate estimate for another. Yet, in hydrological modelling, usually, a particular set of Catchment Characteristics and input data is selected, possibly ignoring other relevant data sources. One of the reasons may be that despite vast research and development efforts in integration methods for sub-sets of the available data sources, there is no comprehensive data-model integration framework assuming existence and enabling effective use of multiple data sources in hydrological modelling.The main objective of this thesis, therefore, is to develop such a data-model integration framework, and test it on a case study.Water Resource
Hoshin V Gupta - One of the best experts on this subject based on the ideXlab platform.
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the soil water Characteristic as new class of closed form parametric expressions for the flow duration curve
Journal of Hydrology, 2016Co-Authors: Mojtaba Sadegh, Jasper A Vrugt, Hoshin V GuptaAbstract:Summary The flow duration curve is a signature Catchment Characteristic that depicts graphically the relationship between the exceedance probability of streamflow and its magnitude. This curve is relatively easy to create and interpret, and is used widely for hydrologic analysis, water quality management, and the design of hydroelectric power plants (among others). Several mathematical expressions have been proposed to mimic the FDC. Yet, these efforts have not been particularly successful, in large part because available functions are not flexible enough to portray accurately the functional shape of the FDC for a large range of Catchments and contrasting hydrologic behaviors. Here, we extend the work of Vrugt and Sadegh (2013) and introduce several commonly used models of the soil water Characteristic as new class of closed-form parametric expressions for the flow duration curve. These soil water retention functions are relatively simple to use, contain between two to three parameters, and mimic closely the empirical FDCs of 430 Catchments of the MOPEX data set. We then relate the calibrated parameter values of these models to physical and climatological Characteristics of the watershed using multivariate linear regression analysis, and evaluate the regionalization potential of our proposed models against those of the literature. If quality of fit is of main importance then the 3-parameter van Genuchten model is preferred, whereas the 2-parameter lognormal, 3-parameter GEV and generalized Pareto models show greater promise for regionalization.