高密度电法在文山广南地区铝土矿地下水环境影响评价中的应用

Application of High Density Resistivity Method in Environmental Impact Assessment of Bauxite Groundwater in Guangnan of Wenshan Karst Regions

文山州广南县属于岩溶发育地区,地下水分布情况较为复杂,不利于地下水环境影响评价工作的开展。利用高密度电法对岩溶发育区进行了地下水勘查,为项目的地下水环境影响评价提供重要依据。文章采用多功能数字直流激电仪等设备,获得地下水电阻率分布情况,使用2DRES等软件进行反演,得出形象化的测线断面图,结合地质钻探调查资料,可较准确的推断矿区地下水及岩溶分布规律。高密度电法有成本低、工作周期短、效率高、成果直观等优点,在岩溶地区地下水环境影响评价中有广阔的应用前景。

Guangnan County of Wenshan City belongs to karst development area with complex distribution of groundwater, which is adverse to the groundwater environmental impact assessment. High density resistivity method is used to conduct groundwater exploration in karst development area, providing important basis for groundwater environmental impact assessment of the project. In this paper, the distribution of resistivity of underground water is obtained by using multi-function digital DC power meter, and the software of 2DRES is used for inverting to obtain the line section map. Combined with the geological drilling investigation data, the distribution law of underground water and karst can be accurately deduced. The high density resistivity method has the advantages in low cost, short working cycle, high efficiency and intuitionistic results. It has a broad application prospect in the groundwater environmental impact assessment in karst areas.