摘要
现阶段气候变化以及剧烈的人类活动,导致降雨-径流形成机理及规律发生了变化。合理分析降雨-径流变化规律及其影响因素,是水文学以及生态环境学中重要的研究领域。以西沟流域为例,采用统计学方法,在上下游历史洪水的对比分析和年际降雨、径流变化曲线趋势分析的基础上,建立降水-径流双累积曲线以及单次降雨-径流相关图,定量分析降雨-径流的变化规律,进而分析总结出其影响因素。研究结果表明,西沟流域降雨呈年际波动变化,径流呈现逐步减少的趋势,2000年为径流突变年份,这是由于降水、地下水资源开发利用、水利工程以及其他人为活动因素共同作用影响造成的。
At the present stage,climatic change and frequent human activities have caused the change of formation mecha-nism and rules of rainfall-runoff. It is a significant research field of hydrology and ecological environment study to reason-ably analyze the changing pattern of rainfall-runoff and influential factors. This research takes Xigou Basin as an example,adopting statistical method,based on contrastive analysis of the previous bloods in upstream and downstream and of the vari-ation tendency of yearly rainfall-runoff,and creates a double mass curve of rainfall-runoff and single rainfall-runoff corre-logram. It conducts a quantitative analysis on the changing pattern of rainfall-runoff and further concludes the influentialfactors. The results indicate that the rainfall of Xigou Basin has annual fluctuation and there is a tendency of gradual de-crease in runoff. In 2000 the runoff changed suddenly,which is caused by rainfall,development of groundwater resources,hydraulic engineering and other human activities.
引文
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