南昌市降水特性分析与频率计算问题研究  

Statistical analysis and frequency calculation of precipitation in Nanchang City

作　　者：兰盈盈[1] LAN Yingying(School of Hydraulic and Ecological Engineering,Nanchang Institute of Technology,Nanchang 330099,China)

机构地区：[1]南昌工程学院水利与生态工程学院,江西南昌330099

出　　处：《南昌工程学院学报》2020年第6期14-18,共5页Journal of Nanchang Institute of Technology

基　　金：江西省教育厅科学技术研究项目(GJJ180922);国家自然科学基金资助项目(51969016)。

摘　　要：收集了南昌市近70年的降雨资料,采用Lee-Heghinian检验法判断序列变异点,通过变异点对前后两序列进行一致性修正,解决存在一定趋势变化序列的频率计算问题。应用统计分析与频率计算等方法手段,研究南昌市降雨量在年际、年内的集中与偏小程度。结果表明,南昌市年降雨量变化趋势较平稳,最小3个月与最大月降雨量离散较大,易出现洪水与干旱问题,最大日降雨量略有增加趋势,城市暴雨洪水的形式会更加严峻。给出了频率计算成果表,为各类涉水工程规划与设计提供水文依据。The precipitation data of Nanchang City during the past 70 years were collected.Lee-Heghinian test was used to judge the variation point of the sequence,and the consistency of the two sequences was corrected through the variation point to solve the frequency calculation problem of the sequence with certain trend change.The concentration and small degree of rainfall in Nanchang City is studied by means of statistical analysis and frequency calculation.The results show that the change trend of annual rainfall in Nanchang is relatively stable,and the minimum three months and the maximum month precipitation are scattered greatly,which is prone to flood and drought problems.The maximum one-day precipitation increases slightly,and the form of urban rainstorm flood may be more severe.The results of frequency calculation are given to provide hydrological basis for the planning and design of various water related projects.

关 键 词：频率计算 Lee-Heghinian检验 非一致性 降水量 

分 类 号：P333.6[天文地球—水文科学]