Regionalization of lumped water balance model parameters based on multipleregression

This study establishes a method for evaluating the coefficients of tank mod el. First, the model coefficients were optimized using the Standardized Pow ell Method at 12 watersheds. Then 16 characteristics were derived from geog raphical information on topography, soil type, geology, and land-use of the basins. Finally, a multiple linear regression model was applied to the rel ationship between the model coefficients and the basin characteristics. Tri al application of the regression equations worked successfully at two diffe rent watersheds, suggesting that the coefficients of the tank model could b e evaluated based solely on the geographical characteristics of the basin. (C) 2001 Elsevier Science B.V. All rights reserved.