| Title |
Evaluation of Runoff and Pollutant Loads using L THIA 2012 Runoff and Pollutant Auto calibration Module and Ranking of Pollutant Loads Potential |
| Authors |
장춘화 ( Chun Hwa Jang ) ; 금동혁 ( Dong Hyuk Kum ) ; 하준수 ( Jun Soo Ha ) ; 김경순 ( Kyong Soon Kim ) ; 강동한 ( Dong Han Kang ) ; 김극태 ( Keuk Tai Kim ) ; 신동석 ( Dong Suk Shin ) ; 임경재 ( Kyoung Jae Lim ) |
| Keywords |
Auto calibration; Direct runoff; Genetic algorithm; L THIA 2012; Nonpoint source pollutant loads |
| Abstract |
Urbanization from agricultural/ forest areas has been causing increased runoff and pollutant loads from it. Thus, numerous models have been developed to estimate NPS loading from urban area and Long Term Hydrologic Impact Analysis L THIA model has been used to evaluate effects of landuse changes on runoff and pollutant loads. However, the L THIA model could not consider rainfall intensity in runoff evaluation. There fore, the L THIA model, capable of simulating runoff using 10 minute rainfall data, was applied to the study areas for evaluation of estimated runoff and NPS. The estimated Nash Sutcliffe coefficient NSE values were over 0.6 for runoff, BOD, TN, and TP for most sites and watershed. The calibrated model was further extended to other counties for pollutant load potential evaluation. Pollutant load potential maps were developed and target areas were identified. As shown in this study, the L THIA 2012 can be used for evaluation runoff and pollutant loads with limited data sets and its estimation could be used in identifying pollutant load hot spot areas for implementation of site specific Best Management Practices. |