Variation of Annual Inflow Runoff and Influencing Factors in Gongshang Reservoir
BI Jinghao
CHEN Xinhua
Abstract：Based on the rainfall and inflow data of the upstream of Gongshang Reservoir,methods such as linear trend analysis,moving average,cumulative anomaly,R/S analysis,and double mass curve were used to analyze the variation of inflow runoff and its influencing factors for Gongshang Reservoir from 1976 to 2022.The results showed that the annual inflow runoff of Gongshang Reservoir generally exhibited a continuous slight decreasing trend from 1976 to 2022,decreasing at a rate of approximately 5.9 million m3 per year.The Hurst index(H)of this time series inflow was 0.6282,indicating that the inflow runoff in this basin would continue to show a slight decreasing trend in the future.The annual inflow runoff of the reservoir was dually affected by precipitation and human activities;overall,the impact of human activities was greater.The impact value of human activities reached a maximum of 35 million m3 between 1996 and 2015,which was more than 11 times the impact value of precipitation.These findings provide scientific bases for the sustainable utilization and rational scheduling of water resources in the reservoir region.
Keywords：Gongshang Reservoirannual inflow runoffprecipitationhuman activities
Publication Date：2025-11-20
Online Publishing Date：2025-12-15(First online date of this platform, not the publication date of the document)
Pages：4( 65-68 )