2023 CSDMS meeting-030: Difference between revisions

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|CSDMS meeting state=Florida
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|CSDMS meeting email address=ssetegn@fiu.edu
|CSDMS meeting email address=ssetegn@sfwmd.gov
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{{CSDMS meeting abstract title temp2023
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|CSDMS meeting abstract title=Coupled Hydrologic and Hydraulic Model for Simulation of Freshwater Inflow to Estuaries in Costal Watersheds
|CSDMS meeting abstract title=A Linked Hydrologic, Hydraulic, and Water Quality Model for Simulation of Freshwater Inflow to Estuaries in Coastal Watersheds
|Working_group_member_WG_FRG=Coastal Working Group, Hydrology Focus Research Group, Ecosystem Dynamics Focus Research Group
|Working_group_member_WG_FRG=Coastal Working Group, Hydrology Focus Research Group, Ecosystem Dynamics Focus Research Group
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|CSDMS meeting coauthor first name abstract=Shimelis
|CSDMS meeting coauthor last name abstract=Setegn
|CSDMS meeting coauthor institute / Organization=SFWMD/FIU
|CSDMS meeting coauthor town-city=Mimai
|CSDMS meeting coauthor country=United States
|State=Florida
|CSDMS meeting coauthor email address=ssetegn@fiu.edu
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{{CSDMS meeting abstract template 2023
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|CSDMS meeting abstract=This study presents a coupled hydrologic and hydraulic model for simulating freshwater inflow to estuaries in coastal watersheds. The model integrates a hydrologic model that simulates the distribution of freshwater over the coastal watershed and a hydraulic model that simulates freshwater transport through the estuary. The hydrologic model is based on a physically based, distributed rainfall-runoff model, while the hydraulic model uses a two-dimensional, depth-averaged model of estuarine circulation. The two models are coupled with a consistent set of boundary conditions and physical parameters. The model is a time-dependent, coupled hydrologic and hydraulic simulation model. It includes the representation of basic surface hydrology, groundwater flow, surface water flow, and water quality fate and transport. The model is capable of simulating hydrology in watersheds with high groundwater tables and dense drainage canal networks. The model was developed using long-time series rainfall, temperature, evapotranspiration, basin boundary, hydrography including streams and canals features, soil, land use, and land surface elevations. The coupled model is applied to a case study of a coastal watershed in south Florida, and the results are compared to observations from the field. The results indicate that the model accurately simulates the distribution of freshwater over the coastal watershed and the transport of freshwater through the estuary and that it is a valuable tool for understanding the dynamics of freshwater inflow to estuaries in coastal watersheds.
|CSDMS meeting abstract=Freshwater inflow plays a substantial role in the water quality of coastal and estuarine watersheds and ecosystems. The salinity of an estuary can vary depending on the amount of freshwater received. In highly managed systems, such as St. Lucie and Caloosahatchee estuaries in south Florida, USA, understanding total freshwater inflow and the sources of inflow is very important for management decision-making. There is very little information on the quantity of freshwater inflow to St. Lucie and Caloosahatchee estuaries from their ungauged tidal basins. This study examines a linked hydrologic, hydraulic, and watershed water quality model (WaSh) for simulating freshwater inflow to these two systems. The WaSh model is a time-dependent simulation model that represents basic surface hydrology, groundwater flow, surface water flow, and water quality fate and transport. The WaSh model consists of four basic components; a cell-based representation of the watershed basin land surface, a groundwater component, a surface-water drainage system, and a water management component that can consider the effects of reservoirs, stormwater treatment areas, irrigation supply and demand, and land-use changes. The model is capable of simulating hydrology in watersheds with high groundwater tables and dense drainage canal networks, which is typical in South Florida.  
The model was developed using long-time series of rainfall, temperature, evapotranspiration, basin boundaries, hydrography including streams and canals features, soils, land use, and land surface elevations. The results indicate that the model accurately simulates the distribution of freshwater over the coastal watersheds and the transport of freshwater through the estuary and that it is a valuable tool for understanding the dynamics of freshwater inflow to estuaries in coastal watersheds.
 
Keywords: Coastal Hydrology, Ungauged basin, WaSh model, estuary, Salinity, hydrologic and hydraulic model, water quality
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A Linked Hydrologic, Hydraulic, and Water Quality Model for Simulation of Freshwater Inflow to Estuaries in Coastal Watersheds


Shimelis Setegn, SFWMD/FIU West Palm Beach Florida, United States. ssetegn@sfwmd.gov



Freshwater inflow plays a substantial role in the water quality of coastal and estuarine watersheds and ecosystems. The salinity of an estuary can vary depending on the amount of freshwater received. In highly managed systems, such as St. Lucie and Caloosahatchee estuaries in south Florida, USA, understanding total freshwater inflow and the sources of inflow is very important for management decision-making. There is very little information on the quantity of freshwater inflow to St. Lucie and Caloosahatchee estuaries from their ungauged tidal basins. This study examines a linked hydrologic, hydraulic, and watershed water quality model (WaSh) for simulating freshwater inflow to these two systems. The WaSh model is a time-dependent simulation model that represents basic surface hydrology, groundwater flow, surface water flow, and water quality fate and transport. The WaSh model consists of four basic components; a cell-based representation of the watershed basin land surface, a groundwater component, a surface-water drainage system, and a water management component that can consider the effects of reservoirs, stormwater treatment areas, irrigation supply and demand, and land-use changes. The model is capable of simulating hydrology in watersheds with high groundwater tables and dense drainage canal networks, which is typical in South Florida.

The model was developed using long-time series of rainfall, temperature, evapotranspiration, basin boundaries, hydrography including streams and canals features, soils, land use, and land surface elevations. The results indicate that the model accurately simulates the distribution of freshwater over the coastal watersheds and the transport of freshwater through the estuary and that it is a valuable tool for understanding the dynamics of freshwater inflow to estuaries in coastal watersheds.

Keywords: Coastal Hydrology, Ungauged basin, WaSh model, estuary, Salinity, hydrologic and hydraulic model, water quality