| 改进的DRASTIC方法研究杭州西湖分水岭的浅层地下水的易污性 |
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| 作者姓名： | DONG LIANG ZHU YINMEI N. OGURA |
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| 作者单位： | Department of Environmental Science, Zhejiang University, Hangzhou 310029 (China);;Department of Environmental Science, Zhejiang University, Hangzhou 310029 (China);;The United Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509 (Japan) |
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| 基金项目： | *1Project supported by the British Council (No.SHA/992/297) and the Zhejiang Provincial Science and Technology Development Foundation (No.99-2-030). |
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| 摘 要： | The quality of shallow groundwater in the West Lake watershed was investigated from March to July 2000. Integrating with Blackland GRASS GIS system, the DRASTIC model was used to compile the groundwater vulnerability map. A land use factor was added to the DRASTIC model and the modified model (LDRASTIC) increased the accuracy of prediction from 26.9% to 51.3%. The vulnerability map showed that the lowly, moderately and highly susceptible area predicted occupied about 11.6%, 70.9% and 17.5% of the whole watershed, respectively. Compared with the observed values of nitrate and electric conductivity, the LDRASTIC index improved the Pearson correlation coefficients from -0.010 to 0.237 and 0.380 to 0.503; both the improved coefficients were significant at the 0.01 level. The modified DRASTIC analysis showed a great potential as a screening tool for policy decision-making in groundwater management.
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| 关 键 词： | 中国 杭州 西湖流域 浅层地下水 潜在污染 脆弱性 改良DRASTIC法 |
A modified DRASTIC approach to shallow groundwater vulnerability in the West Lake watershed in Hangzhou, China |
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| DONG LIANG,ZHU YINMEI,N. OGURA.A modified DRASTIC approach to shallow groundwater vulnerability in the West Lake watershed in Hangzhou, China[J].Pedosphere,2002,12(1):73-80. |
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| Authors: | DONG Liang ZHU Yin-Mei and N OGURA |
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| Institution: | Department of Environmental Science, Zhejiang University, Hangzhou 310029 (China);;Department of Environmental Science, Zhejiang University, Hangzhou 310029 (China);;The United Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509 (Japan) |
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| Abstract: | The quality of shallow groundwater in the West Lake watershed was investigated from March to July 2000. Integrating with Blackland GRASS GIS system, the DRASTIC model was used to compile the groundwater vulnerability map. A land use factor was added to the DRASTIC model and the modified model (LDRASTIC) increased the accuracy of prediction from 26.9% to 51.3%. The vulnerability map showed that the lowly, moderately and highly susceptible area predicted occupied about 11.6%, 70.9% and 17.5% of the whole watershed, respectively. Compared with the observed values of nitrate and electric conductivity, the LDRASTIC index improved the Pearson correlation coefficients from -0.010 to 0.237 and 0.380 to 0.503; both the improved coefficients were significant at the 0.01 level. The modified DRASTIC analysis showed a great potential as a screening tool for policy decision-making in groundwater management. |
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| Keywords: | DRASTIC GIS land use factor shallow groundwater vulnerability to pollution |
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