Abstract
Tank model coefficients were optimized at 12 basins. The “Basin Characteristics”, which was concerned with gradient, soil, geology and land use, were derived using GIS data for each basin. The relationship was investigated between the model coefficients and the “Basin Characteristics” using Multiple Regression Analysis. As a result, it was realized that each coefficient could be optimized with a one-dimensional equation that consists of several basin characteristics. According to the results of trial application at 2 basins, it became obvious that this method is useful in constructing a tank model for long term runoff.
