Analysis of Water and Sediment Characteristics in Linyi Section,Yihe River Basin
Based on the time series data of runoff from 1951-2023 and sediment transport from 1954-2023 of Linyi Hydrological Station in the Yihe River Basin,M-K test method,hydrologic statistics method and double accumulation curve method were used to analyze the inter-annual,decadal and annual trend and correlation analysis of the water and sediment characteristics of Linyi hydrological Station.The results show that the runoff and sediment transport of the Yi River has a decreasing trend,and the sediment transport decreases more significantly.The average annual runoff showed a"down-up-down-up"trend,and the average annual sediment transport a"down-up-down-up-down"trend,and the annual sediment transport lagged behind the annual runoff fluctuation.The runoff and sediment transport were mainly concentrated in July and August,accounting for 63％and 90％of the annual total,respectively.There are four turning points in the evolution of water-sediment relationship,1960,1980,1998 and 2020.Climate factors,water projects,soil and water conservation projects and the concept of"two mountains",the construction of beautiful and happy rivers and lakes,integrated protection of mountains,forests,fields,lakes,grass and sand,and restoration projects,as well as other comprehensive management measures,all the above factors have made the water-sediment relationship more stable in the fluctuation.Through the analysis of water and sediment characteristics of Yihe River,some references are provided for flood control and drought relief,water conservancy project construction,water scheduling and management,rational allocation of water resources,water ecological protection and restoration of Yihe River.
Yihe River basinLinyi StationWater and sediment characteristicsRunoff volumeSediment discharge
NETL
NSTL
万方数据
