山東省羊莊盆地巖溶水系統(tǒng)地下水可持續(xù)開發(fā)利用研究
[Abstract]:The karst water-bearing system in Yangzhuang Basin is a typical karst water-bearing system in the north of China with complete boundary conditions and regions of recharge, diameter and discharge. In recent years, due to the development of industry and agriculture, a large number of groundwater has been exploited, resulting in a substantial reduction of groundwater resources and deterioration of water quality. The evaluation index system of groundwater resources and groundwater quality is established. The single index zoning map is drawn by GIS software, and the weight of each index is calculated by analytic hierarchy process and entropy method. Finally, the evaluation result of groundwater sustainable development and utilization is obtained by data superposition. The main results obtained in this paper are as follows: (1) The geological and hydrogeological conditions of Yangzhuang Basin are analyzed in detail. According to the lithologic assemblage and water-rich characteristics of water-bearing media, the groundwater-bearing rocks in the study area are divided into Quaternary loose rock pore water-bearing rocks and Ordovician pore water-bearing rocks. Five types of fractured karst water-bearing rocks of carbonate rocks, upper-middle Cambrian carbonate rocks intercalated with clastic rocks, lower Cambrian clastic rocks intercalated with carbonate rocks, karst fractured water-bearing rocks and metamorphic rocks, and intrusive rocks intercalated with fractured water-bearing rocks are identified, and the related resources and parameters for evaluation are determined. According to the actual situation of the area, seven evaluation indexes, namely, exploitable groundwater resource modulus (F1), natural groundwater recharge resource modulus (F2), water supply degree (F3), groundwater level decline rate (F4), groundwater exploitation potential modulus (F5), spring flow attenuation rate (F6) and groundwater quality grade (F7), were selected to establish the evaluation index system of groundwater sustainable development and utilization. The weight of each index is determined by AHP (subjective method) and entropy method (objective method). Finally, the weighted average value is taken as the weight of the index: F1~0.3075, F2~0.1838, F3~0.0727, F4~0.1248, F5~0.1374, F6~0.1091, F7~0.0647. Among them, the natural groundwater recharge resource module has the greatest influence on the groundwater exploitable resource module. Through collecting data, field investigation and hydrogeological test, the evaluation index data are obtained, and the single index evaluation zoning map is drawn by using GIS. The single index evaluation zoning map is obtained and the single index evaluation is carried out. (4) The data of each index in the study area is superimposed by using GIS software, and the comprehensive evaluation of groundwater sustainable development and utilization is obtained. The comprehensive evaluation results were divided into four grades: 0.8-1.0, 0.6-0.8, 0.4-0.6, 0.2-0.4, which represented the "I-grade-good", "I I-better", "I I I-grade-medium" and "IV-poor" of the sustainable development and utilization of groundwater, respectively. Between 0.0, the sustainable development and utilization of groundwater is "I-grade-good", accounting for 6.99% of the area of the study area, and still has the ability of sustainable development and utilization; the comprehensive index evaluation results of the north-east of Xinzhao fault block and the western margin of Shanting fault block are between 0.2 and 0.4, and the sustainable development and utilization of groundwater is poor, accounting for 25.08% of the total area of the study area, which is not suitable for opening. The results show that Yangzhuang basin in the study area still has the capacity of sustainable development and utilization, sustainable exploitation; Shanting fault block is next, it needs to be properly exploited; Xinzhao fault block is poor, not suitable for exploitation.
【學(xué)位授予單位】:成都理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:P641.8
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