基于模糊综合评判法的岩溶地区地层含水性评价--以三峡地区寒武系地层为例

Evaluation of Stratigraphic Aquosity in Karst Area Based on Fuzzy Comprehensive Evaluation Method—— A Case Study in Cambrian Strata in the Three Gorges Area

为解决岩溶地区地下水非均质性所带来的获取各项参数难度较大的问题,围绕综合性指标"含水性",选取岩性、裂隙、岩溶发育程度3项评价指标,采用将模糊数学评判法与模糊层次分析法相结合的评价方法(模糊综合评判法)对岩溶地区地层含水性进行综合评价,并通过在三峡地区岩溶山区选取寒武系地层进行了方法论证。结果表明:三峡地区岩溶山区寒武系地层的含水性表现为娄山关组>水井沱组二段>覃家庙组;对于不同的地貌类型,三峡地区岩溶山区寒武系覃家庙组地层的含水性强于盆山交界区覃家庙组地层的含水性。该评价结果与实际调查情况相符,证明该评价方法具有一定的可靠性和实用性,可为后续岩溶含水系统划分提供依据,进一步服务于水资源评价。

To deal with the difficulty in obtaining various parameters caused by the heterogeneity of groundwater in karst areas,this article selects three evaluation indexes of lithology,fissures and karst development degree around the comprehensive index"aquosity",and combines the fuzzy mathematics evaluation method with the fuzzy analytic hierarchy process(fuzzy comprehensive evaluation method)to comprehensively and quantitatively evaluate the aquosity of each stratum in karst area.The article selects the Cambrian strata in karst mountainous area in the Three Gorges area to conduct methodological demonstration.The results show that the aquosity of the karst mountainous stratum is Loushanguan Formation>the second member of Shuijingtuo Formation>Qinjiamiao Formation;for different landform types,the aquosity of Qinjiamiao Formation in karst mountainous area is stronger than that of basin mountain in the junction area.The eva-luation result is consistent with the actual survey,which proves that the method as a whole has a certain degree of reliability and practicability,which can provide a basis for subsequent water-bearing system division and further serve the evaluation of water resources.