宁夏工程技术2023，Vol.22Issue(4)：289-294,6.
固原市隆德县降水特性分析
Analysis of Precipitation Characteristics in Longde County,Guyuan City
摘要
Abstract
The variation characteristics of precipitation at different time periods in Longde County and the main factors affecting the precipitation changes during the time periods were studied by sliding average value method,M-K test method,Sen's method,R/S analysis method,wavelet analysis and multiple linear regression method,based on the precipitation data from 1961 to 2019 at Longde Station in Guyuan,Ningxia.The results show that the average annual precipitation is 519.67 mm,and the annual precipitation decreases at a rate of 8.94 mm/(10 a).The overall precipitation shows an insignificant decreasing trend and the trend is continuous.Among the precipitation in each season,the precipitation in summer and autumn shows a decreasing trend,while the precipitation in winter shows a significant increasing trend.The annual precipitation is mainly concentrated in summer,followed by spring and autumn,and the least in winter.There are mainly 28 a,22 a and 12 a cycle changes in this study period,where 28 a is the first main cycle.The inter-annual variation of total annual precipitation and summer precipitation is mainly influenced by precipitation intensity,while that of spring,autumn and winter is jointly influenced by precipitation frequency and precipitation intensity.The results of the study can provide scientific basis for agricultural production,natural disaster defense and water resources planning in Longde County.关键词
隆德/降水特性/趋势分析/周期分析/贡献度分析Key words
Longde/precipitation characteristics/trend analysis/period analysis/contribution analysis分类
大气科学引用本文复制引用
许昊丽,李春光,李超超,田军仓,王培..固原市隆德县降水特性分析[J].宁夏工程技术,2023,22(4):289-294,6.基金项目
宁夏回族自治区重点研发计划重点项目(2020BEG03045,2022ZDYF1132) （2020BEG03045,2022ZDYF1132）
