L-THIA/NPS to Assess the Impacts of Urbanization on Estimated Runoff and NPS Pollution
2003
Lim, K.J. | Engel, B.A. (Purdue Univeristy, West Lafayette, USA) Kim, Y.S. (Korea Institute of Construction Technology, Koyang, Korea Repunlic) Choi, J.D. | Kim, K.S. (Kangwon National University, Kangwon, Korea Republic)
The land use changes from non-urban area to urban areas lead to the increased impervious areas, consequently increased direct runoff and higher runoff. Urban areas have also been recognized as significant sources of Nonpoint Source(NPS) pollution, while agricultural activities have been known as the primary sources of NPS pollution. Many features of the L-THIA/NPS GIS, L-THIA/NPS WWW system have been enhanced to provid easy-to-use system. The L-THIA model was applied to the Little Eagel Creek (LEC) watershed in Indiana to evalute the accuracy of the model. The L-THIA/NPS GIS estimated yearly direct runoff values match the direct runoff separated from U.S. Geological Survey stream flow data reasonably.
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