大伙房水库汛期径流变化趋势及影响因素定量分离研究

发布时间：2018-04-30 06:18

本文选题：大伙房水库 + 汛期　；参考：《水利水电技术》2017年02期

【摘要】：基于大伙房水库1961—2004年汛期各月降雨径流资料,利用Mann-Kendall趋势检验法、Mann-Kendall突变检验法、Pettitt突变检验法和降雨—径流深双累积曲线方法,分析了大伙房水库汛期降雨、汛期径流深、最大月降雨和最大月径流深四类序列的趋势和跳跃特性,并利用累积量斜率变化率定量评价了降雨和人类活动对汛期径流深和最大月径流深的影响。结果表明:(1)流域汛期降雨和径流深下降趋势不显著,最大月降雨和最大月径流深上升趋势不显著;(2)汛期降雨、径流深、最大月降雨和最大月径流深突变不显著,降雨径流关系变异年份分别为1975、1985和1995年,1975年后流域汛期产流能力减弱;(3)大伙房水库汛期径流变化经历了4个阶段,人类活动是导致水库汛期径流深减少的主要原因,降雨变化是导致最大月径流深增加的主要原因。
[Abstract]:Based on the monthly rainfall runoff data of Dahuofang Reservoir during the flood season from 1961 to 2004, using the Mann-Kendall trend test method and the Mann-Kendall mutation test method and the precipitation runoff double accumulation curve method, the rainfall in flood season and the runoff depth in flood season in Dahuofang Reservoir are analyzed. The trend and jump characteristics of the four types of maximum monthly rainfall and maximum monthly runoff depth are analyzed and the effects of rainfall and human activities on runoff depth and maximum monthly runoff depth in flood season are quantitatively evaluated by using the slope change rate of cumulative amount. The results show that the decreasing trend of rainfall and runoff depth in flood season is not significant, but the rising trend of maximum monthly rainfall and maximum monthly runoff depth is not significant in flood season. The abrupt change of runoff depth, maximum monthly rainfall and maximum monthly runoff depth is not significant. The variation years of rainfall runoff relationship were 1975 ~ 1985 and 1995, respectively. After 1975, the runoff production capacity of the basin decreased in flood season. The runoff of Dahuofang Reservoir experienced four stages. Human activity was the main reason for the deep decrease of runoff in flood season. The change of rainfall is the main reason for the increase of maximum monthly runoff.
【作者单位】：三峡大学水利与环境学院;水资源安全保障湖北省协同创新中心;
【基金】：国家自然科学基金项目(41101511,51509141) 湖北省教育厅自然科学研究项目(Q20141204)
【分类号】：TV121

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