The Experts below are selected from a list of 165 Experts worldwide ranked by ideXlab platform
Chuanhai Wang - One of the best experts on this subject based on the ideXlab platform.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Gang Chen, Wenjuan Hua, Xing Fang, Chuanhai WangAbstract:A distributed-framework hydrologic modeling system (DF-HMS) is a primary and significant component of a distributed-framework basin modeling system (DFBMS), which simulates the Hydrological processes and responses after rainfall at the basin scale, especially for non-homogenous basins. The DFBMS consists of 11 Hydrological Feature units (HFUs) involving vertical and horizontal geographic areas in a basin. Appropriate hydrologic or hydraulic methods are adopted for different HFUs to simulate corresponding Hydrological processes. The digital basin generation model is first developed to determine the essential information for hydrologic and hydraulic simulation. This paper mainly describes two significant HFUs contained in the DF-HMS for hydrologic modeling: Hilly sub-watershed and plain overland flow HFUs. A typical hilly area application case study in the Three Gorges area is introduced, which demonstrates DF-HMS’s good performance in comparison with the observed streamflow at catchment outlets.
-
Distributed-Framework Basin Modeling System: I. Overview and Model Coupling
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Wenjuan Hua, Xing FangAbstract:To better simulate the river basin Hydrological cycle and to solve practical engineering application issues, this paper describes the distributed-framework basin modeling system (DFBMS), which concatenate a professional Hydrological model system, a geographical integrated system, and a database management system. DFBMS has two cores, which are the distributed-frame professional modeling system (DF-PMS) and the double-object sharing structure (DOSS). An area/region that has the same mechanism of runoff generation and/or movement is defined as one type of Hydrological Feature unit (HFU). DF-PMS adopts different kinds of HFUs to simulate the whole watershed Hydrological cycle. The HFUs concept is the most important component of DF-PMS, enabling the model to simulate the Hydrological process with empirical equations or physical-based submodules. Based on the underlying source code, the sharing uniform data structure, named DOSS, is proposed to accomplish the integration of a Hydrological model and geographical information system (GIS), which is a new way of exploring temporal GIS. DFBMS has different numerical schemes including conceptual and distributed models. The feasibility and practicability of DFBMS are proven through its application in different study areas.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Xing Fang, Pingnan Zhang, Wenjuan HuaAbstract:A distributed-framework basin modeling system (DFBMS) was developed to simulate the runoff generation and movement on a basin scale. This study is part of a series of papers on DFBMS that focuses on the hydraulic calculation methods in runoff concentration on underlying surfaces and flow movement in river networks and lakes. This paper introduces the distributed-framework river modeling system (DF-RMS) that is a professional modeling system for hydraulic modeling. The DF-RMS contains different Hydrological Feature units (HFUs) to simulate the runoff movement through a system of rivers, storage units, lakes, and hydraulic structures. The river network simulations were categorized into different types, including one-dimensional river branch, dendritic river network, loop river network, and intersecting river network. The DF-RMS was applied to the middle and downstream portions of the Huai River Plain in China using different HFUs for river networks and lakes. The simulation results showed great consistency with the observed data, which proves that DF-RMS is a reliable system to simulate the flow movement in river networks and lakes.
-
Distributed-Framework Basin Modeling System: IV. Application in Taihu Basin
Water, 2021Co-Authors: Gang Chen, Xing Fang, Chuanhai Wang, Pingnan Zhang, Wenjuan HuaAbstract:This paper presents the application of a distributed-framework basin modeling system (DFBMS) in Taihu Basin, China. The concepts of professional modeling systems and system integration/coupling have been summarized in the first three series papers. This study builds a hydrologic and hydrodynamic model for Taihu Basin, which is in the lowland plain areas with numerous polder areas. Digital underlying surface area data agree with the survey results from the water resource development and utilization. The runoff generated in each cell was calculated with the model based on the digital underlying surface data. According to the Hydrological Feature units (HFU) concept from the DFBMS, Taihu Basin was conceptualized into six different HFUs. The basic data of rainfall, evaporation, water surface elevation (WSE), discharge, tide level, and water resources for consumption and discharge in 2000 were used to calibrate the model. The simulated results of WSE and discharge matched the observed data well. The observed data of 1998, 1999, 2002, and 2003 were used to validate the model, with good agreement with the simulation results. Finally, the basic data from 2003 were used to simulate and evaluate the management scheme of water diversion from the Yangtze River to Taihu Lake. Overall, the DFBMS application in Taihu Basin showed good performance and proved that the proposed structure for DFBMS was effective and reliable.
Wenjuan Hua - One of the best experts on this subject based on the ideXlab platform.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Gang Chen, Wenjuan Hua, Xing Fang, Chuanhai WangAbstract:A distributed-framework hydrologic modeling system (DF-HMS) is a primary and significant component of a distributed-framework basin modeling system (DFBMS), which simulates the Hydrological processes and responses after rainfall at the basin scale, especially for non-homogenous basins. The DFBMS consists of 11 Hydrological Feature units (HFUs) involving vertical and horizontal geographic areas in a basin. Appropriate hydrologic or hydraulic methods are adopted for different HFUs to simulate corresponding Hydrological processes. The digital basin generation model is first developed to determine the essential information for hydrologic and hydraulic simulation. This paper mainly describes two significant HFUs contained in the DF-HMS for hydrologic modeling: Hilly sub-watershed and plain overland flow HFUs. A typical hilly area application case study in the Three Gorges area is introduced, which demonstrates DF-HMS’s good performance in comparison with the observed streamflow at catchment outlets.
-
Distributed-Framework Basin Modeling System: I. Overview and Model Coupling
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Wenjuan Hua, Xing FangAbstract:To better simulate the river basin Hydrological cycle and to solve practical engineering application issues, this paper describes the distributed-framework basin modeling system (DFBMS), which concatenate a professional Hydrological model system, a geographical integrated system, and a database management system. DFBMS has two cores, which are the distributed-frame professional modeling system (DF-PMS) and the double-object sharing structure (DOSS). An area/region that has the same mechanism of runoff generation and/or movement is defined as one type of Hydrological Feature unit (HFU). DF-PMS adopts different kinds of HFUs to simulate the whole watershed Hydrological cycle. The HFUs concept is the most important component of DF-PMS, enabling the model to simulate the Hydrological process with empirical equations or physical-based submodules. Based on the underlying source code, the sharing uniform data structure, named DOSS, is proposed to accomplish the integration of a Hydrological model and geographical information system (GIS), which is a new way of exploring temporal GIS. DFBMS has different numerical schemes including conceptual and distributed models. The feasibility and practicability of DFBMS are proven through its application in different study areas.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Xing Fang, Pingnan Zhang, Wenjuan HuaAbstract:A distributed-framework basin modeling system (DFBMS) was developed to simulate the runoff generation and movement on a basin scale. This study is part of a series of papers on DFBMS that focuses on the hydraulic calculation methods in runoff concentration on underlying surfaces and flow movement in river networks and lakes. This paper introduces the distributed-framework river modeling system (DF-RMS) that is a professional modeling system for hydraulic modeling. The DF-RMS contains different Hydrological Feature units (HFUs) to simulate the runoff movement through a system of rivers, storage units, lakes, and hydraulic structures. The river network simulations were categorized into different types, including one-dimensional river branch, dendritic river network, loop river network, and intersecting river network. The DF-RMS was applied to the middle and downstream portions of the Huai River Plain in China using different HFUs for river networks and lakes. The simulation results showed great consistency with the observed data, which proves that DF-RMS is a reliable system to simulate the flow movement in river networks and lakes.
-
Distributed-Framework Basin Modeling System: IV. Application in Taihu Basin
Water, 2021Co-Authors: Gang Chen, Xing Fang, Chuanhai Wang, Pingnan Zhang, Wenjuan HuaAbstract:This paper presents the application of a distributed-framework basin modeling system (DFBMS) in Taihu Basin, China. The concepts of professional modeling systems and system integration/coupling have been summarized in the first three series papers. This study builds a hydrologic and hydrodynamic model for Taihu Basin, which is in the lowland plain areas with numerous polder areas. Digital underlying surface area data agree with the survey results from the water resource development and utilization. The runoff generated in each cell was calculated with the model based on the digital underlying surface data. According to the Hydrological Feature units (HFU) concept from the DFBMS, Taihu Basin was conceptualized into six different HFUs. The basic data of rainfall, evaporation, water surface elevation (WSE), discharge, tide level, and water resources for consumption and discharge in 2000 were used to calibrate the model. The simulated results of WSE and discharge matched the observed data well. The observed data of 1998, 1999, 2002, and 2003 were used to validate the model, with good agreement with the simulation results. Finally, the basic data from 2003 were used to simulate and evaluate the management scheme of water diversion from the Yangtze River to Taihu Lake. Overall, the DFBMS application in Taihu Basin showed good performance and proved that the proposed structure for DFBMS was effective and reliable.
Gang Chen - One of the best experts on this subject based on the ideXlab platform.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Gang Chen, Wenjuan Hua, Xing Fang, Chuanhai WangAbstract:A distributed-framework hydrologic modeling system (DF-HMS) is a primary and significant component of a distributed-framework basin modeling system (DFBMS), which simulates the Hydrological processes and responses after rainfall at the basin scale, especially for non-homogenous basins. The DFBMS consists of 11 Hydrological Feature units (HFUs) involving vertical and horizontal geographic areas in a basin. Appropriate hydrologic or hydraulic methods are adopted for different HFUs to simulate corresponding Hydrological processes. The digital basin generation model is first developed to determine the essential information for hydrologic and hydraulic simulation. This paper mainly describes two significant HFUs contained in the DF-HMS for hydrologic modeling: Hilly sub-watershed and plain overland flow HFUs. A typical hilly area application case study in the Three Gorges area is introduced, which demonstrates DF-HMS’s good performance in comparison with the observed streamflow at catchment outlets.
-
Distributed-Framework Basin Modeling System: I. Overview and Model Coupling
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Wenjuan Hua, Xing FangAbstract:To better simulate the river basin Hydrological cycle and to solve practical engineering application issues, this paper describes the distributed-framework basin modeling system (DFBMS), which concatenate a professional Hydrological model system, a geographical integrated system, and a database management system. DFBMS has two cores, which are the distributed-frame professional modeling system (DF-PMS) and the double-object sharing structure (DOSS). An area/region that has the same mechanism of runoff generation and/or movement is defined as one type of Hydrological Feature unit (HFU). DF-PMS adopts different kinds of HFUs to simulate the whole watershed Hydrological cycle. The HFUs concept is the most important component of DF-PMS, enabling the model to simulate the Hydrological process with empirical equations or physical-based submodules. Based on the underlying source code, the sharing uniform data structure, named DOSS, is proposed to accomplish the integration of a Hydrological model and geographical information system (GIS), which is a new way of exploring temporal GIS. DFBMS has different numerical schemes including conceptual and distributed models. The feasibility and practicability of DFBMS are proven through its application in different study areas.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Xing Fang, Pingnan Zhang, Wenjuan HuaAbstract:A distributed-framework basin modeling system (DFBMS) was developed to simulate the runoff generation and movement on a basin scale. This study is part of a series of papers on DFBMS that focuses on the hydraulic calculation methods in runoff concentration on underlying surfaces and flow movement in river networks and lakes. This paper introduces the distributed-framework river modeling system (DF-RMS) that is a professional modeling system for hydraulic modeling. The DF-RMS contains different Hydrological Feature units (HFUs) to simulate the runoff movement through a system of rivers, storage units, lakes, and hydraulic structures. The river network simulations were categorized into different types, including one-dimensional river branch, dendritic river network, loop river network, and intersecting river network. The DF-RMS was applied to the middle and downstream portions of the Huai River Plain in China using different HFUs for river networks and lakes. The simulation results showed great consistency with the observed data, which proves that DF-RMS is a reliable system to simulate the flow movement in river networks and lakes.
-
Distributed-Framework Basin Modeling System: IV. Application in Taihu Basin
Water, 2021Co-Authors: Gang Chen, Xing Fang, Chuanhai Wang, Pingnan Zhang, Wenjuan HuaAbstract:This paper presents the application of a distributed-framework basin modeling system (DFBMS) in Taihu Basin, China. The concepts of professional modeling systems and system integration/coupling have been summarized in the first three series papers. This study builds a hydrologic and hydrodynamic model for Taihu Basin, which is in the lowland plain areas with numerous polder areas. Digital underlying surface area data agree with the survey results from the water resource development and utilization. The runoff generated in each cell was calculated with the model based on the digital underlying surface data. According to the Hydrological Feature units (HFU) concept from the DFBMS, Taihu Basin was conceptualized into six different HFUs. The basic data of rainfall, evaporation, water surface elevation (WSE), discharge, tide level, and water resources for consumption and discharge in 2000 were used to calibrate the model. The simulated results of WSE and discharge matched the observed data well. The observed data of 1998, 1999, 2002, and 2003 were used to validate the model, with good agreement with the simulation results. Finally, the basic data from 2003 were used to simulate and evaluate the management scheme of water diversion from the Yangtze River to Taihu Lake. Overall, the DFBMS application in Taihu Basin showed good performance and proved that the proposed structure for DFBMS was effective and reliable.
Xing Fang - One of the best experts on this subject based on the ideXlab platform.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Gang Chen, Wenjuan Hua, Xing Fang, Chuanhai WangAbstract:A distributed-framework hydrologic modeling system (DF-HMS) is a primary and significant component of a distributed-framework basin modeling system (DFBMS), which simulates the Hydrological processes and responses after rainfall at the basin scale, especially for non-homogenous basins. The DFBMS consists of 11 Hydrological Feature units (HFUs) involving vertical and horizontal geographic areas in a basin. Appropriate hydrologic or hydraulic methods are adopted for different HFUs to simulate corresponding Hydrological processes. The digital basin generation model is first developed to determine the essential information for hydrologic and hydraulic simulation. This paper mainly describes two significant HFUs contained in the DF-HMS for hydrologic modeling: Hilly sub-watershed and plain overland flow HFUs. A typical hilly area application case study in the Three Gorges area is introduced, which demonstrates DF-HMS’s good performance in comparison with the observed streamflow at catchment outlets.
-
Distributed-Framework Basin Modeling System: I. Overview and Model Coupling
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Wenjuan Hua, Xing FangAbstract:To better simulate the river basin Hydrological cycle and to solve practical engineering application issues, this paper describes the distributed-framework basin modeling system (DFBMS), which concatenate a professional Hydrological model system, a geographical integrated system, and a database management system. DFBMS has two cores, which are the distributed-frame professional modeling system (DF-PMS) and the double-object sharing structure (DOSS). An area/region that has the same mechanism of runoff generation and/or movement is defined as one type of Hydrological Feature unit (HFU). DF-PMS adopts different kinds of HFUs to simulate the whole watershed Hydrological cycle. The HFUs concept is the most important component of DF-PMS, enabling the model to simulate the Hydrological process with empirical equations or physical-based submodules. Based on the underlying source code, the sharing uniform data structure, named DOSS, is proposed to accomplish the integration of a Hydrological model and geographical information system (GIS), which is a new way of exploring temporal GIS. DFBMS has different numerical schemes including conceptual and distributed models. The feasibility and practicability of DFBMS are proven through its application in different study areas.
-
Distributed-Framework Basin Modeling System: II. Hydrologic Modeling System
Water, 2021Co-Authors: Chuanhai Wang, Gang Chen, Xing Fang, Pingnan Zhang, Wenjuan HuaAbstract:A distributed-framework basin modeling system (DFBMS) was developed to simulate the runoff generation and movement on a basin scale. This study is part of a series of papers on DFBMS that focuses on the hydraulic calculation methods in runoff concentration on underlying surfaces and flow movement in river networks and lakes. This paper introduces the distributed-framework river modeling system (DF-RMS) that is a professional modeling system for hydraulic modeling. The DF-RMS contains different Hydrological Feature units (HFUs) to simulate the runoff movement through a system of rivers, storage units, lakes, and hydraulic structures. The river network simulations were categorized into different types, including one-dimensional river branch, dendritic river network, loop river network, and intersecting river network. The DF-RMS was applied to the middle and downstream portions of the Huai River Plain in China using different HFUs for river networks and lakes. The simulation results showed great consistency with the observed data, which proves that DF-RMS is a reliable system to simulate the flow movement in river networks and lakes.
-
Distributed-Framework Basin Modeling System: IV. Application in Taihu Basin
Water, 2021Co-Authors: Gang Chen, Xing Fang, Chuanhai Wang, Pingnan Zhang, Wenjuan HuaAbstract:This paper presents the application of a distributed-framework basin modeling system (DFBMS) in Taihu Basin, China. The concepts of professional modeling systems and system integration/coupling have been summarized in the first three series papers. This study builds a hydrologic and hydrodynamic model for Taihu Basin, which is in the lowland plain areas with numerous polder areas. Digital underlying surface area data agree with the survey results from the water resource development and utilization. The runoff generated in each cell was calculated with the model based on the digital underlying surface data. According to the Hydrological Feature units (HFU) concept from the DFBMS, Taihu Basin was conceptualized into six different HFUs. The basic data of rainfall, evaporation, water surface elevation (WSE), discharge, tide level, and water resources for consumption and discharge in 2000 were used to calibrate the model. The simulated results of WSE and discharge matched the observed data well. The observed data of 1998, 1999, 2002, and 2003 were used to validate the model, with good agreement with the simulation results. Finally, the basic data from 2003 were used to simulate and evaluate the management scheme of water diversion from the Yangtze River to Taihu Lake. Overall, the DFBMS application in Taihu Basin showed good performance and proved that the proposed structure for DFBMS was effective and reliable.
Gero Koehler - One of the best experts on this subject based on the ideXlab platform.
-
Characteristics of Rainfall, Snowmelt and Runoff in the Headwater Region of the Main River Watershed in Germany
Water Resources Management, 2009Co-Authors: Jueyi Sui, Gero Koehler, Faye KrolAbstract:In the headwater region of the Main River watershed in Germany, floods resulted from rain-on-snow events often occur in winter. Data of long-term observations at 16 gauging stations and 11 climate stations are available. Using these data, the objective of this paper is to study the characteristics of precipitation including snow depth and snow water equivalent (SWE). The importance of rainfall on the snow melt process has been assessed. Statistical analysis and trend analysis of extreme precipitation, snow depth, SWE and river discharges have been carried out. Through introducing equivalent precipitation depth from snowmelt with rainfall as a new variable, the simultaneous occurrence of snowmelt and rain-on-snow has been assessed; the characteristics of runoff including peak discharge caused by rain-on-snow have been investigated. The major climatic Feature was found to be a precipitation, which as maximum in summer; and the major Hydrological Feature was a discharge, which was maximum in winter. By using two different models, the Unit Hydrographs at some gauging stations have been determined and compared.
-
Impacts of Snowmelt on Peak Flows in a Forest Watershed
Water Resources Management, 2006Co-Authors: Jueyi Sui, Gero KoehlerAbstract:Using data of long-term observations at three gauging stations and one climatic station in a forest region in southeast Germany, the impacts of snowmelt on peak flow have been investigated in this paper. Results show that the major climatic Feature was found to be a precipitation maximum during the Hydrological summer, and the major Hydrological Feature was a discharge maximum during the Hydrological winter. Empirical equations describing snow depth and snow water equivalent for the studied climatic station have been developed for both snow accumulation period and ablation period. Through introducing snowmelt-rainfall depth as a new variable, the present work investigates the simultaneous occurrence of snowmelt and rainfall on snow cover, assesses the characteristics of runoff including peak flows, calculates the runoff from the snowmelt and rainfall. A Hydrological model has been applied to generate hydrographs resulted from snowmelt and rainfall-on-snow.
