TY - GEN
T1 - Improving hydrologic model performance by using the UNET model
T2 - World Environmental and Water Resources Congress 2006: Examining the Confluence of Environmental and Water Concerns
AU - Lian, Yanqing
AU - Xie, Hua
AU - Demissie, Misganaw
AU - Knapp, H. Vernon
PY - 2007
Y1 - 2007
N2 - Using the U.S. Environmental Protection Agency's (USEPA) Better Assessment Science Integrating Point and Nonpoint Sources (BASINS) system, the Illinois State Water Survey developed a Soil Water Assessment Tool (SWAT) model for the Illinois River basin. The SWAT model was calibrated and verified using observed flows at Marseilles, Kingston Mines, and Valley City along the Illinois River. Over the 1993-2000 simulation period, Nash-Sutcliffe efficiencies for daily, monthly, and annual flows exceeded 0.7 at the three gaging stations, except daily flows at Kingston Mines. However, comparisons between the simulated and observed daily flows indicated that simulated and observed peak flows deviated in magnitude and timing. The SWAT model uses Muskingum and variable storage-flow routing schemes, which are less capable of routing flows in the complex Illinois River that has locks and dams, backwater lakes, and gentle hydraulic gradients with backwater effects from the Mississippi River. The goal of this study was to improve the hydrologic modeling accuracy for daily flow routing on the Illinois River. A one-dimensional unsteady state hydraulic model (UNET) developed for the Illinois River was coupled with the calibrated SWAT model. This paper compares modeling accuracies of the coupled SWAT-UNET models and SWAT model results.
AB - Using the U.S. Environmental Protection Agency's (USEPA) Better Assessment Science Integrating Point and Nonpoint Sources (BASINS) system, the Illinois State Water Survey developed a Soil Water Assessment Tool (SWAT) model for the Illinois River basin. The SWAT model was calibrated and verified using observed flows at Marseilles, Kingston Mines, and Valley City along the Illinois River. Over the 1993-2000 simulation period, Nash-Sutcliffe efficiencies for daily, monthly, and annual flows exceeded 0.7 at the three gaging stations, except daily flows at Kingston Mines. However, comparisons between the simulated and observed daily flows indicated that simulated and observed peak flows deviated in magnitude and timing. The SWAT model uses Muskingum and variable storage-flow routing schemes, which are less capable of routing flows in the complex Illinois River that has locks and dams, backwater lakes, and gentle hydraulic gradients with backwater effects from the Mississippi River. The goal of this study was to improve the hydrologic modeling accuracy for daily flow routing on the Illinois River. A one-dimensional unsteady state hydraulic model (UNET) developed for the Illinois River was coupled with the calibrated SWAT model. This paper compares modeling accuracies of the coupled SWAT-UNET models and SWAT model results.
KW - Hydrologic models
KW - Illinois
KW - River basins
UR - http://www.scopus.com/inward/record.url?scp=84858601304&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84858601304&partnerID=8YFLogxK
U2 - 10.1061/40856(200)215
DO - 10.1061/40856(200)215
M3 - Conference contribution
AN - SCOPUS:84858601304
SN - 0784408564
SN - 9780784408568
T3 - Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
BT - Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
Y2 - 21 May 2006 through 25 May 2006
ER -