Runoff Characteristics of the Controlled Watershed of Baiyekou Reservoir from 1952 to 2021
This article uses multiple indicators to analyze the interannual variation characteristics of runoff data in the control basin of Baiyekou Reservoir from 1952 to 2021 for 70 years.Linear correlation test,Mann Kendall test and Spearman rank correlation test are used to analyze the variation trend of runoff of Baiyekou reservoir,The Mann Kendall mutation test is used to analyze the variation of runoff of Baiyekou reservoir,At the same time,wavelet transform is used to analyze the periodicity of runoff in Baiyekou Reservoir.The results showed that:The runoff of Baiyekou reservoir is unevenly distributed throughout the year.The runoff is mainly concentrated from July to September.The peak value of runoff in most years occurs in August,the peak value of runoff in a few years occurs in July and September,and the peak value of runoff in a few years occurs in October,The annual runoff of Baiyekou reservoir generally shows a significant downward trend in the past decade.The mutation point year is 1970,and the main cycle is 4 years,7 years and 37 years.On a time scale of 37 years,the inflow runoff of the Baiyekou Reservoir will be relatively low after 2019.
万方数据
维普
