基于耗散理论的濮阳市地下水功能评价研究

为解决地下水系统功能评价过程中存在的评价指标适用性差、功能评价结果相对性的问题,本文在分析地下水系统属性和功能内涵的基础上,应用耗散结构理论,采用序参量建立了一套新的、适用性更强的地下水功能评价指标体系及其分级标准,构建了基于系统有序度和信息熵的地下水功能评价模型,并应用于濮阳市地下水功能评价。研究结果表明:范县地下水综合功能强,等级为Ⅰ级,濮阳县、南乐县和台前县地下水综合功能较强,等级为Ⅱ级,清丰县和华龙区地下水综合功能一般,等级为Ⅲ级;黄河流域地下水综合功能强,等级为Ⅰ级,海河流域地下水综合功能一般,等级为Ⅲ级;区域地下水综合功能存在差异的主要原因为地下水过量开采以及由此引发的地面沉降和地下水降落漏斗。所建立的地下水功能序参量适用性强,解决了地下水功能评价结果相对性的问题,功能评价结果能够较好表征濮阳市主要的环境地质问题。

Evaluation of groundwater function in Puyang City based on dissipation theory

In order to solve the problems of poor applicability of evaluation indexes and relativity of evaluation results in the process of groundwater function evaluation,based on the analysis of the attributes and functional connotations of groundwater system,this paper applies the theory of dissipative structure and establishes a new and more applicable groundwater function evaluation index system and corresponding grading standards by using the sequential parameters,and constructs a groundwater function evaluation model on the basis of order degree and information entropy and applies it to the evaluation of groundwater function in Puyang City.The results show that the comprehensive function of groundwater in Fanxian County is strong and the grade is I.The comprehensive function of groundwater in Puyang County,Nanle County and Taiqian County is relatively strong with grade II,and that of Qingfeng County and Hualong District is general with grade III.The comprehensive function of groundwater in Yellow River Basin is strong with grade I,while that of Haihe River Basin is general with grade III.The main reason for the difference of comprehensive function in regional groundwater is the excessive exploitation of groundwater which results in land subsidence and groundwater depression funnel.The established groundwater functional order parameters have strong applicability and solve the problem of relativity of groundwater functional evaluation results.The results of functional evaluation can better characterize the main environmental geological problems in Puyang City.