摘要
利用Mann—Kendall秩相关分析确定了1961～2008年近50年延河流域水沙变化趋势．结果表明，降水量、径流量和输沙量都有显著的减少趋势。进一步分析表明延河流域的径流量和输沙量在1974年和1997年均发生了突变。以1961～1973年为无人类活动影响的基准年，比对1974～1996年和1997～2008年径流量和输沙量，年均径流量分别减少0．17×10^8m^3和0．86×10^8m^3，年均输沙量减少0．17×10^8t和0．41×10^8t。双累积曲线分析表明，延河流域径流量和输沙量的变化主要受人类活动的影响。
This paper analyzed the runoff and sediment in the Yanhe River Basin by Mann-Kendall test in the period of 1961-2008. The results show that strong decreasing trends in annual precipitation, runoff and sediment load have existed, and the turning points of runoff and sediment in the Yanhe River Basin are the year 1974 and 1997. Compared to the years 1961-1973, the annual runoff decreased by 0.17×10^8m^3 and 0.86×10^8m^3, and the annual sediment loads decreased by 0.17×10^8t and 0.41×10^8t in the years 1974-1996 and 1997-2008. The double mass curves were applied to quantitatively analyze the change of runoff and sediment loads in the Yanhe River, which show that the human activity is the main reason of the changes of runoff and sediment loads.
出处
《水文》
CSCD
北大核心
2012年第5期81-86,共6页
Journal of China Hydrology
基金
北京师范大学自主科研基金(2009SD-6)
关键词
水沙特征
人类活动
降水因素
延河流域
characteristics of runoff and sediment load
human activity
rainfall factor
Yanhe River Basin
