摘要
Abstract
Based on the long-term series of annual runoff and monthly precipitation data from 1970 to 2021 in the Zhongzhou River Basin,this paper analyzes the interannual changes and intra-annual distribution patterns of precipitation and runoff in the basin,and applies the Mann Kendall method to analyze the characteristics of precipitation and runoff changes in the basin.The results show that:①The average annual precipitation in the Zhongzhou River Basin is 2222mm,the average annual runoff is 1.192 billion m3,and the average annual runoff depth is 1356mm;The annual precipitation and annual runoff have significant interannual variations,and the distribution within the year is extremely uneven;②The annual,flood season,and dry season runoff of the basin generally shows a downward trend,with a significant downward trend during the dry season;③The annual and dry season precipitation in the basin shows an overall upward trend,with a significant upward trend during the dry season;④After the 1990s,there were significant differences in the sudden changes in precipitation and runoff during the dry season in the watershed,and the hydrological patterns during the dry season were significantly influenced by human activities.关键词
中洲河/降水量/径流量/Mann-Kendall法/趋势检验/突变检验Key words
Zhongzhou river/precipitation/runoff/Mann-Kendall method/trend test/mutation test分类
天文与地球科学
