摘要
【目的】对于同一流域内部不同子区域高程、坡度等地形要素差别较大的情景,采用同一降雨空间插值方法,将显著影响降雨插值结果的精度。为降低流域下垫面差异对降雨插值精度的影响,【方法】以岸堤水库流域为例,采用克里金法(Kriging)、反距离权重法(IDW)法和自然邻域法(NN)法及其两两组合,共9种方案进行分析,通过对比不同降雨插值方法及其组合和不同雨量站点数量情景下的降雨插值效果,对组合降雨空间插值方法进行适应性研究。【结果】结果显示:(1)局部组合和整体单一插值方法插值后所得降雨量在梯度变化、空间分布和子区域分界线两侧有较大差异,局部组合插值的结果优于整体单一插值;(2)岸堤水库流域东北区域采用IDW法、西南区域采用NN法方案插值后不同场次降雨和不同站点的平均MRE值为1.11%,极大值和极小值下分别为1.51%和5.30%,精度最高,效果最优;(3)同一插值方案下,均匀减少插值站点,插值方法精度降低明显。【结论】研究结论如下:在雨量站数量一定的情况下,流域空间地形差异明显、多种插值方法效果相当时,局部组合插值能够综合多种插值方法的特点,使插值方法更适应于流域的局部特性并提升插值精度。本研究对于解决流域地形地貌空间分布差异显著的降雨空间插值问题,具有一定的理论意义和参考价值。
[Objective]For scenarios there are significant differences in terrain elements such as elevation and slope in different sub-regions in a basin,using single rainfall spatial interpolation method will affect the accuracy of rainfall interpolation result.In order to reduce the influence of the underlying surface difference on the accuracy of rainfall interpolation,[Methods]taking the Andi reservoir basin as an example.9 schemes include Kriging,Inverse Distance Weight(IDW),Natural Neighborhood(NN),and their pairwise combinations are used to compare the accuracy of rainfall interpolation in this study.By comparing the rainfall interpolation effects of different rainfall interpolation method and their combinations,and scenarios with different rainfall station numbers,the adaptability of the combined rainfall spatial interpolation method is studied.[Results]The results show that:(1)The rainfall obtained by local combined interpolation and overall single interpolation method has significant differences in gradient changes,spatial distribution,and both sides of the sub-regions boundary.The result of local combined interpolation method are superior to overall single interpolation methods.(2)IDW is used in the northeast area of the Andi reservoir basin and NN in the southwest area,the average MRE values of different rainfall events and different stations is 1.11%and the average MRE values of the maximum and minimum values are 1.51%and 5.30%,respectively.This scheme has the highest accuracy.(3)Under the same interpolation scheme,the rainfall interpolation accuracy has significantly decreased when the interpolation stations are uniformly reduced.[Conclusion]The research conclusion is as follows:When the number of rainfall stations is fixed,and there are significant differences in the spatial terrain of the basin and the effectiveness of multiple interpolation method is equivalent,local combined interpolation can integrate the characteristics of multiple interpolation method,making the interpolation method more suitable for th
作者
陈美
司伟
王庆平
王帅
戈晓斌
胡丽萍
CHEN Mei;SI Wei;WANG Qingping;WANG Shuai;GE Xiaobin;HU Liping(College of Hydrology and Water Resources,Hohai University,Nanjing 210024,Jiangsu,China;Ningbo Hongtai Water Conservancy Information Technology Co.,Ltd.,Ningbo,315033,Zhejiang,China;Hydrology and Water Resources Monitoring Center of Lower Ganjiang River,Yichun 336000,Jiangxi,China)
出处
《水利水电技术（中英文）》
北大核心
2024年第8期59-68,共10页
Water Resources and Hydropower Engineering
基金
中央高校基本科研业务费专项资金资助(B230201030)
江西省“科技+水利”联合计划项目(2022KSG01006)。
关键词
降雨空间插值
下垫面空间差异
单一插值
组合插值
局部适应性
降水
rainfall spatial interpolation
spatial differences in subsurface
single interpolation
combined interpolation
local adaptation
precipitation
