摘要
Abstract
Based on the data of precipitation and runoff from 1961 to 2012,the decadal,annual and seasonal variation trends and characteristics of runoff coefficient of Dahuofang Reservoir Basin in recent 52 years are analyzed herein.The result shows that (1) the decadal variation trend is gentle;(2) the monthly average runoff coefficient presents a fluctuated variation within a year,i.e.slightly lower during June-July,and slightly higher in the periods of December-next January,March-April and August;(3)the annual runoff coefficient presents an unobvious increasing trend,i.e.the minimum values occur during 1988-1992,while the maximum values appear during 2008-2012.The runoff coefficient shows a decreasing trend before 1980 and presents a cyclic fluctuated variation during 1980-2000,and then gives an increasing trend after 2000,moreover,all the annual runoff coefficients of 1965,1968,1971,2010 and 2012 are abruptly changed.关键词
大伙房水库/径流系数/降水量/变化趋势/浑河流域/水资源利用/生态环境管理Key words
Dahuofang Reservoir/runoff coefficient/precipitation/variation trends/Hun River basin/water resources utilization/enviromental management分类
建筑与水利
