Evaluation and Re-estimation of Instream Flow Considering the Water Quality and Aquatic Ecosystem of the Seomjingang River Watershed

In this study, the appropriateness of current publicly announced and managed instream flow in Seomjingang River watershed was evaluated based on water quantity, quality, state aquatic ecosystem. The stream observed rate at Gurye-gun (Songjeong-ri) station that is main point management located lowest downstream River. Another important reason for choosing observational data from before construction major dam to present day were available. quality ecosystem conditions reviewed measured over past 20 years, achievement ratio compared with stations other river systems. Based evaluation result, re-estimated 11 its two branches. currently permitted use River, amount required supply deficit during dry seasons predicted presented as a reference work.