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济南泉域地下水位动态及其对降水响应的交叉小波分析

DOI: 10.11867/j.issn.1001-8166.2012.09.0969, PP. 969-978

Keywords: 地下水位动态,降水,交叉相位,交叉小波变换,济南泉域

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Abstract:

利用1988—2009年济南泉域8个地下水位动态观测点不同时段观测资料及1998—2009年降水数据,采用连续小波变换、交叉小波变换方法对济南泉域地下水位动态的多时间尺度特征、相互关系及其对降水的响应进行了分析。结果表明①济南泉域地下水位动态存在显著的0.82~1.16a的主振荡周期,低频部分仅在部分年份存在1.95~3.09a的振荡周期;②含水岩组富水性对地下水位动态存在影响,研究区主径流方向上弱富水性地段地下水位动态时滞较强富水性地段长,强富水性地段4个观测孔地下水位波动时序基本一致;③地下水位动态对降水的响应滞后明显,为73.06~134.42d,总体表现为地下水径流路径越长,响应越滞后;④基于地下水位动态与基于降水—地下水位动态交叉小波变换得到的观测点对水位动态的滞后时间多数一致,同一径流路径上局部点对滞后时间之和与全局点对有很好的对应关系。交叉小波分析可定量评价泉域地下水位动态及其与降水的相关关系。

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