| 以地质统计方法推估上海第三承压含水层渗透系数的分布 |
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| 引用本文： | 施小清,;姜蓓蕾,;卞锦宇,;魏子新,;王寒梅. 以地质统计方法推估上海第三承压含水层渗透系数的分布[J]. 工程勘察, 2009, 0(1): 36-41 |
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| 作者姓名： | 施小清, 姜蓓蕾, 卞锦宇, 魏子新, 王寒梅 |
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| 作者单位： | [1]南京大学水科学系,南京210093; [2]南京水利科学研究院,南京210029; [3]上海地质调查研究院,上海200072 |
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| 基金项目： | 国家自然科学基金（批准号40702037）和南京大学人才引进科研启动基金项目资助. |
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| 摘 要： | 本文采用地质统计方法分析上海第三承压含水层渗透系数的空间变异性。将取对数后的渗透系数作为区域化变量，计算各个方向的试验变差函数，进行理论变差函数模型拟合，以分析含水层空间结构并判定含水层可能的各向异性。变差函数模型经交互验证后，再采用普通Kriging法进行空间插值获得该含水层的渗透系数空间分布。研究结果表明：对数渗透系数在空间上具有明显的几何各向异性，大约在北偏东300方向有最小的变异性，而在东偏南300方向具有最大的变异性，这与含水层形成的水文地质环境具有密切关系。
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| 关 键 词： | 空间变异性 各向异性 交互验证 Kriging法 上海 |
Geostatistical analysis for estimating the spatial variability of hydraulic conductivity in the third confined aquifer of Shanghai City |
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| Affiliation: | Shi Xiaoqing ,Jiang Beilei ,Bian Jinyu ,Wei Zixin ,Wang Hanmei (1. Department of Hydrosciences, Nanjing University, Nanjing, 210093, China; 2. Hydrology and Water Resources Division, Nanjing Hydraulic Research Institute, Nanjing, 210029, China ; 3. Institute of Geology Survey of Shanghai, Shanghai, 200072, China) |
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| Abstract: | The object of this study is to evaluate the spatial distribution of hydraulic conductivity in the third confined aquifer of Shanghai City. The hydraulic conductivity is considered as a regionalized variable. Then the structure of spatial variation could be established by using the GSLIB software to calculate the theoretical variogram of experimental data for generating the variogram model of spatial directions. After cross validation, ordinary Kriging analysis was provided to expand the spatial variation of hydraulic conductivity and reflect the anisotropic variability in contour map. Results showed that the log of hydraulic conductivity has strongly anisotropic variability and illustrated the minimum variation along the N30°E direction and the maximum variation along the E30°S direction. The anisotropic of topography in such area is controlled by its hydrogeology factor while aquifer was forming. |
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| Keywords: | Spatial Variability Anisotropic Cross-validation Kriging Shanghai |
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