摘要
为了探究出山店水库上游流域近65 a来降水的时空变化特征,基于出山店水库上游流域13个雨量站1952—2017年的逐日降水资料,运用气候倾向率法、Mann-Kendall趋势检验、Morlet小波分析和反距离权重IDW插值法等多种方法,研究了降水的年际变化、周期性与空间分布特征。结果表明:(1)流域1952—2017年多年平均降水量为1028.3 mm,年降水量的气候倾向率为-20 mm/10 a(p<0.05),呈显著下降趋势,从季节上看,春、夏、冬降水随时间变化呈现减少趋势,秋季的降水呈现增加趋势;(2)年降水量呈现南高北低的空间分布,而年降水量的气候倾向率的变化趋势则与之相反;(3)流域降水量变化呈现20 a左右的第一主周期,同时流域的周期性变化也存在一定的空间分布特征。近65 a来,出山店水库上游年降水量变化趋势为先增加后减少,在整个时间域上有显著的下降趋势,并呈现20 a左右的周期性变化。
In order to investigate the spatial and temporal characteristics of precipitation in the upper watershed of the Chushandian Reservoir over the past 65 years,based on the daily precipitation data of 13 rainfall stations in the upper upstream of Chushandian reservoir from 1952 to 2017,the interannual variation,periodicity and spatial distribution characteristics of precipitation were studied by using climate tendency rate method,Mann Kendall trend test,Morlet wavelet analysis and inverse distance weight(IDW)interpolation method.The results show that:(1)from 1952 to 2017,the annual average precipitation was 1028.3 mm,and the climate tendency rate of annual precipitation was-20 mm/decade(p<0.05),which showed a significant downward trend;from the seasonal point of view,the precipitation in spring,summer and winter showed a decreasing trend with time,and the precipitation in autumn showed an increasing trend;(2)the annual precipitation was higher in the south and lower in the north,while the trend of precipitation tendency rate was opposite;(3)the change of precipitation in the basin presented the first main cycle of about 20 years,and the periodic change of the basin also had some spatial distribution characteristics.In the past 65 years,the precipitation in the upstream of Chushandian reservoir showed a significant downward trend,and the difference of time and space was obvious,the trend of annual precipitation in upstream of Chunshandian Reservoir had been increasing and then decreasing,with a significant downward trend throughout the time domain,and annual precipitation showed a cyclical change of about 20 years.
作者
甘容
李丹丹
杨峰
左其亭
GAN Rong;LI Dandan;YANG Feng;ZUO Qiting(School of Water Conservancy Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan Key Laboratory of Groundwater Pollution Prevention and Remediation,Zhengzhou 450001,China;Administration of Reservoir Construction of Chushandian Reservoir,Xinyang,Henan 464043,China)
出处
《水土保持研究》
CSCD
北大核心
2022年第4期150-158,共9页
Research of Soil and Water Conservation
基金
河南省水利科技攻关计划项目(GG202026)
国家自然科学基金(51509222,U1803241)。
作者简介
第一作者:甘容(1983—),女,湖北随州人,副教授,博士,主要从事水文模型及气候变化研究。E-mail:ganrong168@163.com。
