产流模型蓄水容量的一种尺度校正方法

针对不同尺度下地形指数以及蓄水容量的差异问题,以流域栅格地形为依托,提出了蓄水容量的一种尺度校正方法.以地形指数作为辅助因子,通过引入分辨率因子和分形理论分别对决定地形指数的上游集水面积和坡度两个变量进行尺度校正,并根据地形指数与蓄水容量之间的关联关系,计算地形指数校正后的不同尺度蓄水容量.实例验证结果表明,校正后的尺...

A scale correction method for water storage capacity of runoff generation model

In view of the difference of topographic index and water storage capacity in different scales, a scale correction method for water storage capacity is proposed based on the raster topography of the basin. Using the topographic index as an auxiliary factor, two variables that determine the topographic index, namely the upslope catchment area and slope, were respectively scale corrected by introducing the resolution factor and fractal theory; Then, the storage capacity of each scale grid under the corrected topographic index was calculated according to the correlation between the topographic index and the storage capacity. The experiment results showed that the corrected storage capacity of each scale tended to the respective storage capacity of target scale, and the calculated storage capacity area distribution curves approached the target curve. Considering terrain factors, the proposed correction method can not only effectively reduce the influence of grid scale on the calculation of topographic index and water storage capacity, but also greatly reduce the calculation workload and improve the calculation efficiency.