人民长江2025，Vol.56Issue(4)：112-120,9.DOI:10.16232/j.cnki.1001-4179.2025.04.015
多种卫星降水产品在金沙江流域的适用性评估
Applicability assessment of various satellite precipitation products in Jinsha River Basin
摘要
Abstract
Accurate precipitation estimation with high spatial and temporal resolution is crucial for regional hydrological simula-tion and water resources management.To investigate the applicability of satellite precipitation products with high spatial and tem-poral resolution in the Jinsha River Basin,spatial distribution characteristics of annual average daily precipitation,spatial distribu-tion of errors,and the performance in different climatic years and altitude regions of three satellite precipitation products(CHIR-PS,IMERG,and GSMaP)were comprehensively analyzed using statistical and classification indexes.This analysis was based on rain gauge observations provided by the China Meteorological Administration.The results show that:① The spatial distribution characteristics of all satellite precipitation products are similar,showing an increasing trend from the northwest to the southeast in the Jinsha River Basin.② GSMaP shows a higher correlation(CC=0.66),a lower root mean squared error(RMSE=6.38),and a stronger detection ability for precipitation events(POD=0.72,FAR=0.29).In addition,the accuracies of all satellite precipi-tation products are consistently higher during wet years compared to dry years.③ GSMaP consistently demonstrates superior per-formance compared to other satellite precipitation products across various altitude zones.Relatively,the accuracies of all satellite precipitation products are higher in high-altitude than in low-altitude regions.Generally,GSMaP has the highest accuracy,which can provide data support for disaster prevention and reduction and hydrological simulation in the Jinsha River Basin.关键词
卫星降水/适用性评估/CHIRPS/IMERG/GSMaP/金沙江流域Key words
satellite precipitation/applicability assessment/CHIRPS/IMERG/GSMaP/Jinsha River Basin分类
建筑与水利引用本文复制引用
徐涛,顾晶晶,梁犁丽,关昊哲,曹引,龚家国..多种卫星降水产品在金沙江流域的适用性评估[J].人民长江,2025,56(4):112-120,9.基金项目
中国长江电力股份有限公司项目(Z432402001) （Z432402001）
国家自然科学基金项目(52279031,52309040) （52279031,52309040）
国家重点研发计划项目(2023YFC3209302-03) （2023YFC3209302-03）
