摘要
在传统数理法Mann-Kendall的基础上,采用云模型对广东省清远市38个雨量站点1990—2020年降雨量在时间和空间分布上的特性进行了研究。结果表明:①近30年来,清远市降水量在全年、汛期和非汛期均呈现增长趋势,且在全年和非汛期呈现出显著上升趋势;②清远市降雨量在非汛期最为稳定,全年次之,汛期的稳定性最差,降雨量在全年分布最为离散,汛期次之,非汛期较集中;③在空间分布上,年降雨量与汛期降雨量呈相似的空间分布,总体上均有从西北向东南递增的趋势,其中连州市片区降雨量少而集中且稳定,在非汛期,降雨量的分布整体从东南向西北递增,清城区南部降雨量虽然最少且集中,但是不稳定,英德市东北部降雨量虽多且不集中,却较为稳定。
Based on the traditional Mann-Kendall method,this paper analyzes the spatial-temporal precipitation distribution by the cloud model according to the monthly precipitation data(1990—2020)from 38 stations in Qingyuan City,Guangdong province.The results show that:①In the last 30 years,the precipitation in Qingyuan showed an upward trend in the whole year,flood season and non-flood season,especially in the whole year and flood season.②The stability of precipitation was best in non-flood season,less in whole year,and the worst in flood season.The distribution of precipitation was the most discrete throughout the year,followed by flood season,and more concentrated in non-flood season.③The precipitation showed similar spatial distribution in whole year and flood season,increased from northwest to southeast in general,among them the precipitation in Lianzhou City is small,concentrated and stable.In non-flood season,the distribution of precipitation increased from southeast to northwest,among them the precipitation in the south of Qingcheng District is the least and unstable but concentrated;while that in the northeast of Yingde City is large and stable but not concentrated.
作者
王艳
WANG Yan(Qingyuan Hydrology Sub-bureau of Guangdong Province,Qingyuan 511500,China)
出处
《人民珠江》
2021年第11期46-52,共7页
Pearl River
关键词
时空分布
云模型
降雨量
清远市
spatial-temporal distribution
cloud model
precipitation
Qingyuan
