基于遥感降水的西江流域降水时空特征分析  

Temporal and Spatial Characteristics of Precipitation in West River Basin Based on Remote Sensing Precipitation

作　　者：秦湛博 方荣杰[1,2] 黄光灵 粟忠 许景璇 QIN Zhanbo;FANG Rongjie;HUANG Guangling;SU Zhong;XU Jingxuan(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas,Guilin University of Technology,Guilin 541004,China;Guilin Hydrological Center,Guilin 541001,China)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541004 [2]桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004 [3]桂林水文中心,广西桂林541001

出　　处：《人民珠江》2023年第8期127-136,共10页Pearl River

基　　金：桂林市科学研究与技术开发计划项目(20190217-1)。

摘　　要：为精确分析西江流域降水时空特征,利用流域内34个气象站2001—2019年实测降水数据,对同时期GPM降水数据在西江流域的适用性进行评估,并根据GPM数据定量分析西江流域降水时空变化特征。结果表明:GPM数据与实测降水数据一致性高,误差合理,在西江流域具有适用性;流域内年降水量整体表现为上升趋势,且具有欠-丰阶段性变化趋势,4—9月降水量占全年降水量78.39%;年、月降水量空间分布均表现为自西向东逐级递增趋势,19 a降水增加,但未达到90%置信度的区域占72.39%,降水变异程度以中变异程度为主,占比66.24%;19 a间降水表现为反向持续的区域占比78.50%,预计有61.16%在过去19 a中降水增加,但未达到90%置信度的区域,未来的降水可能逆转为减少趋势。研究结果可为科学规划西江流域水资源、推动新阶段流域水利高质量发展提供理论支持。To accurately analyze the spatial and temporal characteristics of precipitation in the West River Basin,this paper evaluates the applicability of GPM precipitation data in the West River Basin from 2001 to 2019 by the measured precipitation data from 34 meteorological stations in the basin and quantitatively analyzes the spatiotemporal variation characteristics of precipitation in the West River Basin based on the GPM data.The results show that the GPM data are consistent with the measured precipitation data with reasonable errors,and have applicability in the West River Basin.The annual precipitation in the basin shows an overall upward trend,and the characteristics of alternate stages of drought and flood periods.The precipitation from April to September accounts for 78.39%of the whole year.The spatial distribution of annual and monthly precipitation shows a gradually increasing trend from west to east step by step.The precipitation has increased in the past 19 years,but 72.39%of the areas do not reach the confidence level of 90%.The degree of precipitation variation is mainly moderate,accounting for 66.24%.In the past 19 years,78.50%of the areas have shown reverse continuous precipitation,and 61.16%of the areas where precipitation increased in the past 19 years do not reach the confidence level of 90%.The future precipitation is likely to reverse to a decreasing trend.The research results can provide theoretical support for scientific planning of West River Basin water resources and promoting the high-quality development of river basin water conservancy in the new stage.

关 键 词：GPM 精度评价 时空分布 西江流域 

分 类 号：P426.6[天文地球—大气科学及气象学]