소유역의 첨두유출량 산정방법 비교연구

Abstract

본 연구에서는 첨두유출량이 실측된 유역에 대하여 여러 가지 산정방법별로 첨두유출량을 계산해보고 실측치와의 회귀분석을 시행하여 상관관계를 검토하였다. 첨두유출량 산정방법으로는 합리식, SCS합성단위유량도법, Clark의 유역추적법, Snyder의 합성단위유량도법, Nakayasu방법을 적용하였다. 대상유역으로는 설마천 시험유역의 전적비교 지점을 선정하여 적용하였으며, 최근 10년간의 최대 강우강도를 적용하였다. 설마천 시험유역의 실측된 첨두유출량과 상관도를 비교한 결과 합리식 0.84735와 Snyder방법과 SCS 합성단위유량도법이 0.83726의 상관계수를 갖는 것으로 나타났다.; This study computed peak flood runoff with various computational methods regarding basins in which peak flood discharge was gauged, performed regression analysis of actual value and then examined correlation. As computational methods of peak flood runoff, Rational Formula, SCS synthetic unit hydrograph method, Clark's watershed routing method, Snyder synthetic unit hydrograph method, and Nakayasu method were applied. As targeted basins, a place to compare results in Seolma-cheon experimental basin was selected and applied. Maximum rainfall intensity in the last 10 years was applied. As the result of comparing the correlation diagram with the peak flood runoff of Seolma-cheon experimental basin actually gauged, it identified a correlation coefficient of 0.84735 for Rational Method and of 0.83726 for Snyder and SCS synthetic unit hydrograph method.