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논문 기본 정보

자료유형
학술대회자료
저자정보
Thuy, Nguyen Thi Phuong (Dept. of Civil Eng., Chungnam National Univ.?E-mail : thuywru101@gmail.com) Kim, Joo-Cheol (IWRRI, Chungnam National Univ.) Jung, Kwansue (Dept. of Civil Eng., Chungnam National Univ.?E-mail : thuywru101@gmail.com)
저널정보
한국수자원학회 한국수자원학회 학술발표회 한국수자원학회 2015년도 학술발표회
발행연도
2015.1
수록면
212 - 212 (1page)

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초록· 키워드

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So far, geomorphologic dispersion due to the heterogeneity characteristics of flow paths in a basin has been demonstrated as a major factor affecting to the hydrologic response function of a catchment. This effect has considered by many previous studies taking into account flow path length factors, especially in the application of width function. Based upon the analysis of topographic index, another important geomorphologic factor extracted from DEM data, this work presents a new factor named saturation to evaluate its effects to the formation of the well-known instantaneous unit hydrograph (IUH) in Nash model and drainage structure in a river basin. First, the geomorphologic parameters corresponding to different saturation conditions are computed from DEM data with the support of GIS software. Then, in the combination of hydrologic and geomorphologic data, effective rainfall in each saturation degree and the Nash parameters are calculated using excel. Finally, the verification process with direct runoff data is conducted using Fortran programming. This process is applied to five sub-watersheds in Bocheong catchment ($485.21km^2$) in Korea where the necessary data are available and believable. The results from this approach will improve researchers and students'understandings about the relationship between rainfall and runoff and its relation with drainage structure within a catchment.

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