产流模型蓄水容量的一种尺度校正方法  

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

作　　者：李超 黄薇 向小华[1] 王志伟 吴晓玲[1] LI Chao;HUANG Wei;XIANG Xiaohua;WANG Zhiwei;WU Xiaoling(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Hangzhou Hydrology and Water Resources Monitoring Center,Hangzhou 310016,China)

机构地区：[1]河海大学水文水资源学院,江苏南京210098 [2]杭州市水文水资源监测中心,浙江杭州310016

出　　处：《水资源保护》2021年第3期74-79,共6页Water Resources Protection

基　　金：中央高校基本科研业务费专项(2018B10914);国家重点研发计划(2016YFA0601000)。

摘　　要：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,校正后的尺度蓄水容量均趋近于目标尺度蓄水容量,蓄水容量面积分布曲线逼近目标曲线;在仅考虑地形因素下,所提出的校正方法不仅能够有效降低尺度对地形指数和蓄水容量计算的影响,而且能够大幅减小计算工作量,提高计算效率。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.

关 键 词：水文尺度 蓄水容量 产流模型 地形指数 尺度校正 

分 类 号：TV121[水利工程—水文学及水资源] P333[天文地球—水文科学]