An Analysis of Runoff Characteristics at Creeks

Jung, Jae-Wook; Yoon, Sei-Eui

Journal of the Korean Society of Hazard Mitigation 2001;1(2):75-84.
Published online September 30, 2001.

소하천 유역의 유출변화 특성분석

정재욱, 윤세의

An Analysis of Runoff Characteristics at Creeks

Jae-Wook Jung, Sei-Eui Yoon

Abstract

In this study, the maintenance problems were investigated through checking the creeks which were improved by close-to-nature river improvement technique. The characteristics of flow were measured at Changsa Creek in Suwon city. The computational results of numerical model with kinematic wave theory was evaluated through observation data about precipitation, velocity, and flow depth. Furthermore, SCS, Clark, and RRL models were compared to the actual observations. As a result, the kinematic wave theory`s calculated peak time of discharge concentration occurred little earlier than the actual observation, but the tendency of hydrograph coincided with observation.

Key Words: creeks; won characteristics; Changsa Creek; kinematic wave model; on-site observation

요지

본 연구에서는 자연형하천으로 정비된 소하천의 실태조사를 통해 정비현황의 문제점을 조사하였다. 수원천 수계에 포함된 창사천을 대상으로 현장관측을 실시하였다. 창사천에서 관측된 강우량, 유속, 수심 등의 자료를 이용하여 운동파 모형의 적용성을 평가하였으며, 실무에서 널리 사용되고 있는 SCS, Clark, RRL 모형과도 비교하였다. 운동파방정식을 창사천유역에 적용했을 때 실측치와 비교적 유사한 결과를 얻을 수 있었다.

핵심용어: 소하천; 유출특성; 창사천; 운동파모형; 현장관측