Analysis of soil parameter impact on runoff estimation in the MRI-AGCM3.2H

Abstract

To enhance the accuracy of runoff estimation by GCMs (General Circulation Models), effects of land surface parameters on runoff estimation were investigated by using MRI-AGCM3.2H. In this study, two experiments were conducted. One was simulation with default saturated hydraulic conductivity, the other one was simulation with low value saturated hydraulic conductivity. As a result of setting low saturated hydraulic conductivity, surface runoff was increasing and subsurface runoff was decreasing. In some area, the magnitude of increasing surface runoff exceeded that of decreasing subsurface runoff and vice versa.