Abstract
A method with multi-layer and grid-based runoff model using Hydro-BEAM (Hydrological River Basin Environment Assessment Model) is proposed to analyze the integrated hydrological processes. The spatiotemporal water flow is calculated with the kinematic wave model for surface runoff, Richards' equation for unsaturated subsurface flow and the unconfined flow model for groundwater. The initial loss of rainfall due to interception by depression storage process is considered here. Moreover the basin division and land use dynamics are introduced to analyze reservoir operation and land utilization with human activities. The proposed model is calibrated for different initial conditions and parameters, and applied to the Yasu River to verify the dynamic linkage between surface and groundwater.
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