人类活动对赣江入湖泥沙量的影响  

Effect of Human Activities on Sediment Load Evolution into Poyang Lake from Ganjiang River

作　　者：涂安国 杨洁 李英 郑海金 莫明浩 

机构地区：[1]江西省水土保持科学研究院,南昌330029

出　　处：《水土保持学报》2013年第2期76-79,共4页Journal of Soil and Water Conservation

基　　金：江西省优势科技创新团队计划项目(20115BCB29022);水利公益性行业科研专项(201001055)

摘　　要：运用Spearman秩相关检验和双累积曲线等方法,分析了赣江外洲站1970-2011年入湖泥沙量演变趋势。在此基础上,通过产沙函数S=Mf(Q,P)导出的人类活动对输沙量影响模型和双累积曲线回归模型研究了人类活动对输沙变化规律的影响,并定量计算了人类活动对赣江流域入湖泥沙减少的贡献率。结果表明,近40多年来,赣江外洲站入鄱阳湖泥沙量年际波动较大,总体呈明显减少趋势。水土保持措施的实施、水利工程的修建等人类活动是入湖泥沙减少的主要驱动力。相比1970-1983年基准年,1984-1992年人类活动年均减少入湖泥沙量153.95万t,贡献率为49.27%;随着人类活动的加剧,至1993-2011年人类活动年均减少入湖泥沙量734.51万t,贡献率高达97.24%。The evolution of the load of sediment into the Poyang lake from 1970 to 2011 was analyzed by Spearman test and double cumulative curve method. Based on this, the impact of human activities on sediment variation was analyzed, and the contribution rate of human activities was calculated quantitatively by human activities on sediment load impact model which was exported by sediment yield function, and double cumulative curve regression model. The research results show that the load of sediment was obviously decreased and interannual fluctuations. Soil and water conservation measures, water conservancy construction and other human activities were the main driving force which effected sediment reduction. Compared to 1970 --1983, the sediment during 1984--1992 reduced 1. 539 5 million t by human activities, the contribution rate was 49.27%. With the increasing human activities, the sediment annual reduced 7. 345 1 million t by human activities to 1993--2011, the contribution rate was up to 97.24%.

关 键 词：产沙函数 人类活动 贡献率 赣江流域 

分 类 号：P333.4[天文地球—水文科学] TV141.3[水利工程—水文学及水资源]