基于分区的不同尺度降雨空间插值方法研究  

Research on Rainfall Spatial Interpolation Method at Multiple Scales Based on Partitioning

作　　者：庹俊 袁晓艾 张毅 卫俊洁 宫留留 尹章才[2] TUO Jun;YUAN Xiaoai;ZHANG Yi;WEI Junjie;GONG Liuliu;YIN Zhangcai(China Energy Changyuan Enshi Hydropower Development Co.,Ltd.,Enshi 445000,Hubei,China;College of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430010,Hubei,China;Changjiang Survey,Planning,Designing and Research Co.,Ltd.,Wuhan 430010,Hubei,China)

机构地区：[1]国能长源恩施水电开发有限公司,湖北恩施445000 [2]武汉理工大学资源环境工程学院,湖北武汉430010 [3]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《水力发电》2024年第11期21-26,共6页Water Power

基　　金：国家自然科学基金资助项目(42171415)。

摘　　要：针对地形复杂多变的恩施地区单一空间插值方法不总适应的问题,提出了一种针对恩施地区的分区方案和各区独立插值的方法。采用分而治之的策略解决了恩施地区降雨插值误差最小的优化问题,较好地平衡了地形异质性与降雨自相关性之间的矛盾,并依据与降雨密切相关的高程因子对恩施地区实现了剖分;基于划分的子区域,采用均方根误差为各子区域筛选出最优的插值方法,实现分区的个性化插值。实验结果表明:此方法不仅能减小子区域地形异质性,降低地形因子对降雨插值的影响,还能找出适用于恩施地区分区插值的最优方案。研究结果可以应用于气温、湿度、PM2.5等具有局地适用性的空间插值领域。In order to solve the problem that the single spatial interpolation method cannot always adapt to the complex and changeable terrain in Enshi region,this paper proposes a zoning scheme and an independent interpolation method for Enshi region.It use the divide-and-conquer strategy to solve the optimization problem of minimizing rainfall interpolation error in Enshi region,which better balance the contradiction between terrain heterogeneity and rainfall autocorrelation,and realize the subdivision of Enshi area according to elevation factors closely related to rainfall.Based on the divided subregions,the root-mean-square error evaluation method is used to select the optimal interpolation method for each subregion,which realizes the personalized interpolation of the subregion.The experimental results indicated that the proposed method can not only reduce the topographic heterogeneity in small regions and thus reduce the influence of topographic factors on rainfall interpolation,but also find out the optimal scheme suitable for regional interpolation in Enshi region.The research results can be applied to the field of spatial interpolation with local applicability such as temperature,humidity and PM2.5.

关 键 词：降雨量 空间插值 空间自相关 交叉检验 恩施 

分 类 号：P426.6[天文地球—大气科学及气象学]