| Title |
Morphometric Characteristics and Correlation Analysis with Rainfall-runoff in the Han River Basin |
| Authors |
이지행(Lee, Ji Haeng) ; 이웅희(Lee, Woong Hee) ; 최흥식(Choi, Heung Sik) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.2.0237 |
| Keywords |
형태학적 특성;유출률;상관특성;다중회귀분석식 Morphometric characteristics;Runoff ratio;Correlation;Multiple regression equation |
| Abstract |
The basin characteristics reflect the attributes of geomorphological pattern of basin and stream networks affect the rainfall-runoff. In order to analyze the relationship between the basin runoff and stream morphometric characteristics, the morphometric characteristics were investigated for 27 water-level observation stations on 19 rivers in the Han River basin using Arc-map. The morphometric characteristics were divided into linear, areal and relief aspects for calculation while the annual mean runoff ratio as a basin response by rainfall was estimated using the measured precipitation and discharge to analyze the rainfall-runoff characteristics. The correlation among the morphometric parameters were schematized to analyze the correlations among them. The multiple regression equation for rainfall-runoff ratio was provided with morphometric parameters of stream length ratio, form factor ratio, shape factor, stream area ratio, and relief ratio and the coefficient of determination was 0.691. The RMSE and MAPE between the measured and the estimated annual runoff rates were found as 0.09, 11.61% respectively, the suggested regression equation showed good estimation. |