长江科学院院报Issue(3)：20-26,7.DOI:10.3969/j.issn.1001-5485.2015.03.005
三峡库区龙河流域降雨和人类活动对水沙关系变化贡献率分析
Contributions of Precipitation and Human Activities to the Runoff and Sediment Variation in Longhe River Watershed of Three Gorges Reservoir Area
摘要
Abstract
The variation trend of sediment and precipitation in Longhe River Watershed which is the centre of the Three Gorges Reservoir area was analyzed according to the measured data in 1963-2010.Pettitt test,accumulative anomaly analysis and double mass curve analysis were employed for the research.The year 1982 was found to be the inflection point of precipitation,and 1982 and 1990 the inflection points of sediment load.The contributions of precipitation and human activity to sediment change during three periods (1963-1981,1982-1990,1991-2010) were compared and analyzed.Results reveal that with 1963-1981 as baseline period,precipitation and human activ-ity contribute 29.49% and 60.51% respectively to the sediment change in 1982-1990,and 3.38% and 96.62%respectively in 1991-2010;whereas when 1982-1990 is taken as the baseline period,human activity alone contrib-utes 100% to the sediment decrease in 1991-2010.This research reveals the trend of sediment load change in Longhe River watershed during 1963-2010,and also the contributions of precipitation and human activity.It is of great importance to the soil and water conservation and assessment,and also provides theoretical support to the sharp decline of runoff and sediment discharge in Three Gorges Reservoir Area.关键词
水沙关系/龙河流域/人类活动/贡献率/三峡库区Key words
runoff and sediment relationship/Longhe river watershed/human activities/contribution rate/Three Gorges Reservoir area分类
天文与地球科学引用本文复制引用
刘惠英,程冬兵,张平仓,江辉..三峡库区龙河流域降雨和人类活动对水沙关系变化贡献率分析[J].长江科学院院报,2015,(3):20-26,7.基金项目
国家自然科学基金项目（41461080）；水利部公益性行业专项（201201048，201301059）；江西省土壤侵蚀与防治重点实验室开放基金项目 （）
