基于未确知测度理论的含水层富水性评价方法

含水层富水性分区是合理开发地下水资源的重要前提。为了解决传统富水性评价中过分依赖水文地质钻探资料以及影响因素的不确定性问题,以内蒙古荒漠草原典型煤矿为研究区,通过分析含水层富水性影响因素,结合大地电磁测深成果(MT)建立指标体系与分级标准。基于未确知测度理论的优势,利用模糊层次分析法与熵权法(FAHP-EW)组合确定指标权重,建立含水层富水性综合评价模型,并对研究区含水层富水性分区进行评价,借助地理信息系统(GIS)的空间信息融合功能将评价结果可视化。最后采用地面核磁共振(SNMR)技术验证评价结果的准确性。结果表明该方法对研究区富水性分区评价较为合理,证明该评价方法具有一定的有效性和实用性,可为荒漠草原含水层富水性评价提供方法借鉴。

Method of Evaluating the Water-richness of Aquifer Based on Unascertained Measurement Theory

Zoning of the water-richness of aquifer is an important prerequisite for the rational development of groundwater resources.To address the over-reliance on hydrogeological drilling data and the uncertainty of influencing factors in traditional water-richness evaluation,an indicator system and its corresponding grading standard were established via analyses on the influence factors of water-richness in association with magnetotelluric sounding results.The typical mining area of desert steppe in Inner Mongolia was taken as the research area.Based on the advantages of unascertained measurement theory,the index weights were determined by combining fuzzy analytic hierarchy process (FAHP) and entropy weight (EW).A comprehensive evaluation model of aquifer's water-richness was built.The evaluation results were further visualized with the help of GIS spatial information fusion function.Finally,the accuracy of the evaluation results was verified by surface nuclear magnetic resonance (SNMR).The results demonstrated the rationality,effectiveness and practicality of the present evaluation method,which offers a reference for evaluating the water-richness of aquifer in desert steppe.