【摘 要】
：
采用长江流域宜昌、寸滩和武隆站水文资料,dbN小波分析方法分析了三峡工程运行对宜昌径流变化的影响,的结论如下.(1)宜昌日流量序列分析结果：2003年2月份径流序列的突变与
【出 处】
：
中国地理学会2013年(华东地区)学术年会
论文部分内容阅读
采用长江流域宜昌、寸滩和武隆站水文资料,dbN小波分析方法分析了三峡工程运行对宜昌径流变化的影响,的结论如下.(1)宜昌日流量序列分析结果：2003年2月份径流序列的突变与三峡水库运行无关,突变点(2006年)恰好与三峡水库二期蓄水时间一致,2007年2月份径流序列突变与三峡水库在枯季放水发电有直接关系.2003年10月径流序列的突变与三峡水库运行无关,2005年10月径流序列也发生了突变现象,说明2006年10月份径流序列突变与三峡水库蓄水运行有直接关系.(2)三峡工程运行对宜昌径流特性的影响：三峡工程运行加剧了长江上游汛期径流减少的趋势,增加了枯季径流增大的趋势；使坝下游径流过程发生了变化,增加了枯季径流量,减少了蓄水期间径流量,使年内分配的不均匀性减小,径流的极差减小,改变了天然径流原有节律,致使长江中下游径流特征发生了变异.
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