Hack의 법칙과 소하천의 지형학적 특성분석

In this study, the topographical characteristics of the small river basin were evaluated using Hack’s law and the shape factor. For this purpose, the basin area and river length were classified by the cluster analysis and the scale parameter of Hack’s law was estimated. In addition, we understand the basin shape though the shape factor and examine the effect of shape factor on the empirical formula which is applied for the design flood estimation of small river basin. As result, we found the small river is the straight river close to the square river basin shape. The result of empirical formula evaluation for design flood estimation, the time of concentration and the storage coefficient have a relation of 1.37 and Russel coefficient is 0.73. It means that the time of concentration and storage coefficient is estimated smaller compared with the middle-big basin. It will be possible to develop the empirical formula which is suitable to domestic small river basin if the rainfall and discharge analysis and additional research are carried out.