水资源与水工程学报2017，Vol.28Issue(1)：32-39,44,9.DOI:10.11705/j.issn.1672-643X.2017.01.06
洞庭湖入出湖径流泥沙年内变化规律及成因分析
Analysis on annual variation law and its causes of runoff and sediment flowing in and out of the Dongting Lakes
摘要
Abstract
According to the long time series observation data of monthly runoff and sediment,annual variation law and its causes of runoff and sediment flowing in and out of the Dongting Lake were analyzed by means of non-uniformity coefficient,concentration degree and concentration period,and the Mann-Kendall trend test methods.The results showed that:Annual runoff distribution of the four Rivers (i.e.,the Xiang River,Zi River,Yuan River and Li River) into the Dongting Lake were uneven,the concentration period was from May to July.Annual sediment distribution were very uneven and had a trend of being more and more uneven,the concentration period was from June to July;Annual runoff distribution of three oulets of Jingjiang into the Dongting Lake changed little in general trend,but the annual distribution of sediment were more and more uneven,the concentration period of runoff and sediment were both July;The CVY values of annual runoff and sediment in Chenglingji differed for different years,CVY values of annual sediment fluctuated and had increase trend,but there was no trend for CVY of annual runoff;the concentration period of runoff was in July,but the concentration period of sediment was in April due to the interaction of runoff and sediment;Annual distribution of runoff and sediment became more uniform because of the application of the hydraulic engineering construction and conservation of water and soil.The concentration period of runoff and sediment for the four rivers,three outlet and the lake delayed gradually,the concentration degree of sediment was higher than runoff.关键词
径流/泥沙/年内变化规律/年不均匀系数/集中度/集中期/洞庭湖Key words
runoff/sediment/annual variation law/annual nonuiformity coefficient/concentration degree/concentration period/Dongting Lake分类
建筑与水利引用本文复制引用
毛德华,曹艳敏,李锦慧,胡光伟,李正最,周慧..洞庭湖入出湖径流泥沙年内变化规律及成因分析[J].水资源与水工程学报,2017,28(1):32-39,44,9.基金项目
湖南省教育厅重点项目(15A114) （15A114）
湖南省水利科技重大项目(湘水科计[2015] 13-22) （湘水科计[2015] 13-22）
湖南省重点学科建设项目(2011-001) （2011-001）
