Considering the spatial heterogeneity of hydrological parameters inside a large grid,a sub-grid parameterization scheme is adopted to divide the large grid into a couple of hillslope elements.

• 在建模过程中尽量利用相关的地理信息描述长江上游地区下垫面特点及其空间变化,并采用次网格参数化方法处理大网格内水文参数的非均一性。