The bed evolution of the Tali river and Chi-Chi weir of Choshui river basin were simulated by alluvial river-movable bed-two dimensional model.

• 集水区地文性土壤冲淤模式结合地理资讯系统，可有效处理集水区之水文及地文特性参数，无须简化水文及地文条件，亦可迅速更新集水区之水文及地文资料，更符合集水区之现况。