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ISWS Research Report 125PDF

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Title:Hydrologic Modeling of Landscape Functions of Wetlands
Author(s):Demissie, Misganaw; Akanbi, Abiola A.; Khan, Abdul
Subject(s):Wetland
watershed
hydrology
hydraulics
model
channel routing
ground water
baseflow
peakflow
discharge
hydrograph
drainage
mathematical model
hydrologic function
wetland function
overland flow
Abstract:An extensive literature review of existing hydrologic and hydraulic models has been conducted to select a mathematical model suitable for simulating the dynamic processes of wetlands and their impact on the hydrologic responses of the watershed containing the wetlands. Due to the lack of a single suitable model, a base model was developed by incorporating watershed and channel-routing components from two of the reviewed models. This physically based, distributed-parameter model has been tested and applied to one of the selected test watersheds in Illinois to evaluate the impact of wetlands on the watershed hydrology. The simulation results indicate that the peakflow reduction due to the presence of wetlands is significant for wetland areas of up to 60 percent of the watershed area. The reduction in peakflow was observed to diminish with distance downstream of the wetland outlet, indicating that the influence of the wetlands decreases as the distance from the wetland increases. The model results cannot be generalized for other watersheds until the model has been tested and verified for several watersheds in different parts of Illinois.
Issue Date:1997
Series/Report:ISWS RR-125
Genre:Technical Report
Type:Text
Language:English
URI:http://hdl.handle.net/2142/75861
Date Available in IDEALS:2015-04-24


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