Flood Discharge Analysis on Land Use Changes in Han Stream, Jeju Island
토지이용변화에 따른 한천유역의 홍수유출 변동 분석

Se-Chang Yang, Sung-Kee Yang, Jun-Ho Lee, Woo-Yul Jung, Kwang-Hyo Ko
2015 Journal of Environmental Science International  
A number of projects for development have been done continuously due to the increase of tourist in Jeju Island. However flood disaster countermeasure due to urbanization is not considered during this development projects. This study is to make basic process for the flood estimation in Han stream of Jeju Island. The variation of stream discharge due the every 5 years' land use change from 1980 to 2005. Data for flood events (rainfall and discharge) were collected for HEC-HMS model. Clark method
more » ... odel. Clark method was used for unit hydrograph analysis. For the estimation of Clark unit hydrograph parameters, Kraven II and Sabol's empirical equations were applied. The peak discharge increased 9.9~33.67% and total discharge amount increased 12.53~30.21%. Also, time of concentration for peak discharge was reduced by 10 minutes for each event.
doi:10.5322/jesi.2015.24.4.425 fatcat:kst6uv7xsvfmrivgpshdd6tmni