| Title |
Review of Features and Applications of Watershed-scale Modeling, and Improvement Strategies of it in South-Korea |
| Authors |
박윤식 ( Youn Shik Park ) ; 류지철 ( Jichul Ryu ) ; 김종건 ( Jonggun Kim ) ; 금동혁 ( Donghyuk Kum ) ; 임경재 ( Kyoung Jae Lim ) |
| DOI |
https://doi.org/10.15681/KSWE.2020.36.6.592 |
| Keywords |
APEX; CAT; HSPF; STREAM; SWAT; Watershed-scale modeling |
| Abstract |
In South Korea, the concept of water environment was expanded to include aquatic ecosystems with the Integrated Water Management implementation. Watershed-scale modeling is typically performed for hydrologic component analysis, however, there is a need to expand to include ecosystem variability such that the modeling corresponds to the social and political issues around the water environment. For this to be viable, the modeling must account for several distinct features in South Korean watersheds. The modeling must provide reasonable estimations for peak flow rate and apply to paddy areas as they represent 11% of land use area and greatly influence groundwater levels during irrigation. These facts indicate that the modeling time intervals should be sub-daily and the hydrologic model must have sufficient power to process surface flow, subsurface flow, and baseflow. Thus, the features required for watershed-scale modeling are suggested in this study by way of review of frequently used hydrologic models including: Agricultural Policy/Environmental eXtender(APEX), Catchment hydrologic cycle analysis tool(CAT), Hydrological Simulation Program-FORTRAN(HSPF), Spatio-Temporal River-basin Ecohydrology Analysis Model(STREAM), and Soil and Water Assessment Tool(SWAT). |