石家庄—衡水剖面地下水化学特征及水文地球化学过程

发布时间：2018-01-09 12:12

本文关键词：石家庄—衡水剖面地下水化学特征及水文地球化学过程　出处：《中国地质大学(北京)》2017年硕士论文　论文类型：学位论文

【摘要】：地下水是石家庄与衡水地区工农业生产和生活用水的重要水源。受自然因素和人类活动影响,地下水环境逐渐变差,威胁了饮用水安全,限制了地下水用途,水的供需矛盾日益突出。因此,深入研究石家庄衡水地下水的水化学特征和形成过程,对合理开发、利用和保护地下水水源有着重要意义。本文依托“京津冀地区地质环境综合监测”项目,以石家庄-衡水剖面的第四系地下水为研究对象,分别对第四系含水组四层含水层中的水化学成分进行了系统研究,采用Piper三线图分析了地下水化学类型特征,通过改进的内梅罗指数法评价了地下水质量,采用离子比例系数法及不同离子相关关系图研究了地下水化学成分的形成过程,并用PHREEQC模拟了不同含水层中的水岩相互作用,得出以下主要结论:1.Piper三线图分析结果表明,地下水化学特征在水平方向上具有分带性。从山前平原至中部平原第Ⅰ、第Ⅱ含水层水化学类型主要由HCO_3-Ca·Mg型水、HCO_3·Cl-Ca·Mg型水过渡为Cl·SO_4-Na·Ca型水、Cl·SO_4-Na·Mg型水;第Ⅲ、第Ⅳ则主要由HCO_3-Ca·Mg型水、HCO_3-Na·Ca型水过渡为Cl·SO_4-Na型水、Cl·HCO_3-Na型水。2.水质评价结果表明,第Ⅰ、第Ⅱ含水层水质较差;第Ⅲ、第Ⅳ含水层水质相对较好。符合III类水标准的水样分别占各含水层总水样的50%、66.7%、90.5%和81.8%。3.离子比例系数分析得出,地下水动力条件自西向东具有明显的分带性,从山前平原至中部平原地下水动力作用逐渐减弱,且随含水层深度增加而减弱;从山前平原至中部平原阳离子交替吸附作用逐渐加强,且随含水层深度的增加也逐渐加强;水化学离子成分的主要矿物来源是盐岩、碳酸盐岩、硫酸盐岩和硅酸盐岩等。4.计算和分析表明,石家庄、衡水地区地下水主要受溶滤作用、蒸发浓缩作用、阳离子交替吸附作用、氧化还原作用和人类活动的共同影响影响。水文地球化学反向模拟结果显示,决定第Ⅰ、第Ⅱ含水层水化学特征的主要水文地球化学作用依次为蒸发浓缩作用、溶滤作用和阳离子交替吸附作用;决定第Ⅲ、第Ⅳ含水层水化学特征的主要水文地球化学作用依次为溶滤作用和阳离子交替吸附作用。
[Abstract]:Groundwater is the Shijiazhuang and Hengshui areas of industrial and agricultural production and an important source of living water. Affected by natural factors and human activities, the groundwater environment becomes worse, threatening the safety of drinking water, limiting the use of groundwater, water supply and demand contradiction is increasingly prominent. Therefore, and the formation process of the in-depth research of Shijiazhuang water chemical characteristics of groundwater in Hengshui. For the rational development, utilization and protection of groundwater is important water source. This paper is based on the comprehensive monitoring of geological environment of Beijing Tianjin Hebei region project, research object in Shijiazhuang - Hengshui section of the Quaternary Groundwater, respectively for the Quaternary aquifer group of water chemical composition of four layer aquifer were studied using Piper three line map analysis of the characteristics of groundwater chemical types, the groundwater quality was evaluated by Nemero index method, using the proportional coefficient method and different ion ion correlation Is to study the formation process of groundwater chemical composition, PHREEQC is used to simulate the interaction of water with different water rock, main conclusions are as follows: three line graph 1.Piper analysis results show that the chemical characteristics of groundwater zonation in the horizontal direction. From the piedmont plain to the Central Plains of the first, the second containing water the chemical type of water is mainly composed of HCO_3-Ca - Mg water, HCO_3 - Cl-Ca - Mg - SO_4-Na - Cl transition to water Ca water, Cl - SO_4-Na - Mg type water; III, IV is mainly composed of HCO_3-Ca - Mg water, HCO_3-Na - Ca water transition for Cl - SO_4-Na water, Cl - HCO_3-Na water.2. water quality evaluation results show that the first and the second aquifer water quality is poor; the third, the fourth aquifer water quality is relatively good. Meet the class III water standard water samples respectively the total water aquifer of 50%, 66.7%, 90.5% and 81.8%.3. ion ratio analysis, groundwater dynamic. Parts from the west to the East has obvious zonation, gradually weakened from the piedmont plain to the Central Plains groundwater dynamic function, and with the aquifer depth increases; from the piedmont plain to the Central Plains of the cation exchange adsorption gradually strengthened, and with the increase of aquifer depth is gradually strengthened; the main source of mineral water chemical ion composition the salt rock, carbonate rock, sulfate and silicate rocks.4. calculation and analysis show that the Shijiazhuang Hengshui area, groundwater is mainly affected by leaching, evaporation, cation exchange adsorption, influence of oxidation-reduction and the impact of human activities. The reverse hydrogeochemical simulation results show that the decision of the first. Aquifer hydrochemical characteristics of the second main hydrogeochemical action followed by evaporation, dissolution and cation exchange reaction; decision III, IV water The main hydrogeochemical characteristics of the chemical characteristics of layer water are filtration and cation alternately adsorption.

【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P641.3

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