| 区域地下水系统防污性能评价方法探讨与验证——以鲁北平原为例 |
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| 关键词:regional groundwater vulnerability aeration zone clay layer assessment and verification |
| 基金项目:国家自然科学基金项目(编号: 41172214);中国地质调查局地质调查项目(编号: 1212010634603) |
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| The Method for Regional Groundwater Vulnerability Assessment and the Verification of the Assessment Results: A Case Study of the Northern Shandong Plain |
| In regional groundwater vulnerability assessment, the impact factors are multiple and complex, and hence it is difficult to determine the evaluation system and the weights of factors objectively. This problem has affected the credibility of the assessment results. Selecting the Northern Shandong Plain as the study area, the authors used innovative overlay and index method. The conventional DRASTIC model was improved and converted into DRITCS model to evaluate groundwater vulnerability. The evaluation factors of DRITCS model included the groundwater depth, integrated lithology of the aeration zone, thickness of clay layer with the thickness of a single layer over 0.5 m within 2 m of land surface, aquifer thickness, permeability coefficient, and net recharge. A key factor in groundwater vulnerability assessment was determined reasonably, which represented the changes of the clay layer in the aeration zone. The DRITCS model was used to evaluate the groundwater vulnerability in northern Shandong plain as an example and was verified by nitrogen pollution status of the study area. The verification of groundwater vulnerability assessment results of northern Shandong plain indicates that the proposed method can reflect objectively the spatial differences and regional distribution characteristics of groundwater vulnerability caused by phase transition of the basin. It is proved that the DRITCS Model has good practicability. |
| LIU Chun-hua,ZHANG Guang-hui,WANG Wei,MENG Su-hua,YANG Li-zhi,JI Wen-long,LIU Zhi-zheng.2014.The Method for Regional Groundwater Vulnerability Assessment and the Verification of the Assessment Results: A Case Study of the Northern Shandong Plain[J].Acta Geoscientica Sinica,35(2):217-222. |
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