| 济南泉域地下水位动态及其对降水响应的交叉小波分析 |
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| 引用本文： | 祁晓凡,杨丽芝,韩晔,尚浩,邢立亭.济南泉域地下水位动态及其对降水响应的交叉小波分析[J].地球科学进展,2012,27(9):969-978. |
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| 作者姓名： | 祁晓凡 杨丽芝 韩晔 尚浩 邢立亭 |
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| 作者单位： | 1. 山东省地质调查院,山东济南,250013
2. 济南大学资源与环境学院,山东济南,250022 |
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| 基金项目： | 山东省地质勘查基金项目“济南城市地质调查”(编号:鲁勘字，国家自然科学基金项目“浅层大陆盐化咸水水文地质参数变异机制研究” |
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| 摘 要： | 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0.82～1.16 a的主振荡周期,低频部分仅在部分年份存在1.95～3.09 a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73.06～134.42 d,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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| 关 键 词： | 地下水位动态 降水 交叉相位 交叉小波变换 济南泉域 |
Cross Wavelet Analysis of Groundwater Level Regimes and Precipitation- Groundwater Level Regime in Ji' nan Spring Region |
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| Qi Xiaofan,Yang Lizhi,Han Ye,Shang Hao,Xing Liting.Cross Wavelet Analysis of Groundwater Level Regimes and Precipitation- Groundwater Level Regime in Ji' nan Spring Region[J].Advance in Earth Sciences,2012,27(9):969-978. |
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| Authors: | Qi Xiaofan Yang Lizhi Han Ye Shang Hao Xing Liting |
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| Institution: | 1.Shandong Institute of Geological Survey, Ji’nan 250013, China;2. School of Resources and Environment, University of Ji’nan, Ji’nan 250022, China |
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| Abstract: | Based on observations of eight groundwater level regime observational points from 1998 to 2009 in Jinan spring region and the precipitation amount from 1988 to 2009, by adopting the methods of continuous wavelet transform, cross wavelet transform and cross phase, the paper analyzes the multiple time scale characteristics of groundwater level regime, its correlation with each other, as well as response to precipitation. Conclusions are drawn as follows: The region is of obvious 0.82~1.16 years significant oscillation periods with 1.95~3.09 years of low frequency oscillation occurring in some areas with no obvious high frequency oscillation period. Observations from three dot pairs, the Tuwu village Water Group Co, Xiaozhuang village Kuangli village, and Laoshigou village Royal Heights established to investigate the main runoff of the region by analyzing cross wavelet transforms of groundwater level regime and precipitation groundwater level regime show that the water level regime of the nether observational points lag behind that of the upper ones respectively by 9.41, 11.90, 33.97 d and 5.63, 17.73, 31.87 d. Water abundance of the region is also surveyed and it is believed that water abundance has impact on time delay characteristic of groundwater level regime and that larger figures occur in weak abundance sections while small ones in strong water abundance sections. The four observational points, the parking lot 102, Xiaozhuang village, Water Group Co, Dayu Village in strong water abundance sections show similar groundwater level fluctuations, which is resulted from basically simultaneous runoff supply or strong runoff. The groundwater level regime in Laoshigou village lags behind precipitation by 73.06 d, other observational points by 101.11~134.42 d, indicating that there is significant time delay between groundwater level regime and precipitation, and also that the longer the groundwater runoff distance, the longer the time delay is. Based on cross wavelet transform of groundwater level regime and precipitation groundwater level regime, most observational points get close time delay, despite a few different figures due to difference in precipitation data, observation time and precipitation recharge mechanism, etc. Under the same observation time in cross wavelet transform of groundwater level regime, a functional relationship is found between the total time delay sum of part dot pairs and that of the whole dot pairs in the same runoff areas. Thus, cross wavelet can be analyzed to investigate correlation between groundwater level regime and precipitation of a region. |
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| Keywords: | Groundwater level regime Precipitation Cross phase Cross wavelet transform Ji' nan springregion |
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