水土保持通报2012，Vol.32Issue(3)：37-41,67,6.
降水变化和人类活动对纸坊沟小流域年径流的影响
Effects of Precipitation Change and Human Activities on Annual Runoff from Small Watershed of Zhifanggou Watershed
摘要
Abstract
The measured data of annual precipitation and runoff during 49 years（1955—2003） for the small watershed of Zhifanggou located near Pingliang City,Gansu Province,were statistically analyzed in order to understand and quantify the contributions of human activities,and precipitation change to the variation of runoff on the Loess Plateau.It was found that although annual precipitation did not change significantly,annual runoff showed a tendency of significant reduction from 59.1 mm in the 1950′s to 12.2 mm in the early of the 21th century,a relative reduction of 72.4%.Based on the double-mass-curve of accumulated annual precipitation and annual runoff,the variation of precipitation—runoff was divided into five stages： 1955—1964,1965—1976,1977—1985,1986—1995 and 1996—2003.Then the stage of 1955—1964 was chosen as the base stage for comparisons,and the contributions of human activities and precipitation change to annual runoff variation were separated and quantified for each stage.Besides the obvious contribution of annual precipitation decrease to annual runoff reduction in dry stage,the variations of annual runoff in other stages were mainly caused by the human activities,and the absolute contribution of human activities showed an increasing tendency.All these indicate that a rational planning of human activities is an important approach to solve the water problems on the Loess Plateau.关键词
黄土高原/纸坊沟小流域/径流/降水/人类活动Key words
Loess Plateau/Zhifanggou watershed/runoff/precipitation/human activity分类
天文与地球科学引用本文复制引用
王明玉,王百田,赵铭军,任烨,毛泽秦..降水变化和人类活动对纸坊沟小流域年径流的影响[J].水土保持通报,2012,32(3):37-41,67,6.基金项目
十二五规划项目“近期黄土丘陵沟壑区节水防蚀水土保持林研究与示范” （）
