Runoff Characteristics of Chishui River From 1970 to 2021
LI Changjiang
FANG Xiaoyu
AN Meiyun
PENG Yun
Abstract：The runoff characteristics and trends of the Chishui River was analyzed using Spearman rank correlation test,Mann Kendall test,and ordered cluster analysis based on the runoff series data from the Chishui River hydrological station from 1970 to 2021.To aim at for providing reference for the scientific management,development,and utilization of water resources,as well as the protection of the ecological environment in the Chishui River Basin.The research results show that the annual,flood season,and dry season runoff of the Chishui River all show varying degrees of insignificant decreasing trends.The year 2000 was the sudden change point of annual runoff reduction in the Chishui River Basin,2002 was the sudden change point of flood season runoff reduction,and 1992 was the sudden change point of dry season runoff reduction.The annual runoff in the Chishui River Basin mainly has three time scale oscillation periods of 56,42,and 31 years;There are three main time scale oscillation periods for flood season runoff:56,41,and 31 years;During the dry season,there are three main time scale oscillation periods for runoff:55,44,and 10～12 years.
Keywords：Chishui Riverrunoff characteristicsevolution trend
Publication Date：2025-04-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 26-31 )