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http://dx.doi.org/10.3741/JKWRA.2010.43.4.353

Discharge Estimation at Ungauged Catchment Using Distributed Rainfall-Runoff Model  

Choi, Yun-Seok (Water Resources Research Div., Korea Institute of Construction Technology)
Kim, Kyung-Tak (Water Resources Research Div., Korea Institute of Construction Technology)
Shim, Myung-Pil (Dept. of Civil Engineering, Inha Univ.)
Publication Information
Journal of Korea Water Resources Association / v.43, no.4, 2010 , pp. 353-365 More about this Journal
Abstract
Generally, river discharge is measured at flood forecasting points, upstream dam points, large rivers, and important points over a basin, and it is hard to estimate discharge of medium or small stream and small catchment. Physically based rainfall-runoff model with geographical parameters can simulate discharge at all the points within a basin with optimized parameters for a point in the basin. In this study, GRM (Grid based Rainfall-runoff Model) calibrated at the outlet is applied. The discharge at upstream point is estimated and the possibility of model regionalisation is examined for ungauged catchment of small or medium stream within a river system. Wicheon and Boksu watershed in Nakdonggang (Riv.) and Yudeungcheon (Riv.) respectively are selected. The discharge at Miseong and Sindae station is simulated with the parameters estimated at Museong and Boksu station. The results of Miseong and Sindae station show good agreement with observed hydrographs in peak discharge and peak time and consistently linear relationships with high correlations in discharge volume, peak discharge, and peak time. And it shows GRM could be applied to estimate discharge at ungauged catchments along a river system.
Keywords
GRM; ungauged catchment; distributed rainfall-runoff model; regionalisation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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