沧州深层高氟地下水氟分布及演化规律研究
发布时间：2018-09-04 17:02
【摘要】：氟含量高是沧州深层地下水水化学特征之一。为了反映沧州地区地下水资源量和揭示深层地下水氟的演变机制,本文分析了1980年和2014年沧州地区深层地下水中氟含量变化,对沧州深层地下水中氟的分布规律和演化模拟过程进行了研究。使用ArcGIS软件描绘沧州地区深层地下水氟的平面分布规律。结果表明沧州地区深层地下水氟浓度平面分布表现为西部最低,中西部和东部沿海次之,中部最高,且在2014年,其面积增至约占沧州地区总面积的50%。可直接饮用的地下水资源面积减少。运用PHREEQC软件和MODFLOW软件分别建立沧州地区深层地下水水平方向水文地球化学模型和垂直方向的溶质运移模型。根据沧州地区深层地下水中氟的分布规律选取具有在同一水流路径上沿水流方向具有上下游关系的两个采样点,用1980年和2014年相应采样点的采样数据模拟出沧州地区深层地下水高氟水水平方向的来源为萤石沿水流路径水流方向不断发生溶解反应。用沧州地区深层地下水溶质运移模型模拟出沧州地区第Ⅲ含水层高氟水来源于更高浓度的第Ⅳ含水层氟的垂向运移。根据1980年和2014年第Ⅲ含水层氟离子的浓度对氟离子溶质运移模型进行率定,用率定好的沧州地区深层地下水溶质运移模型预测出2030年沧州地区第Ⅲ含水层氟离子平均浓度为1.64mg/L。预计在深层地下水开采活动下,沧州深层地下水氟含量会继续增加,沧州地区居民长期饮用会对身体健康造成影响。
[Abstract]:High fluorine content is one of the hydrochemical characteristics of deep groundwater in Cangzhou. In order to reflect the quantity of groundwater resources in Cangzhou area and reveal the mechanism of fluorine evolution in deep groundwater, this paper analyzes the variation of fluoride content in deep groundwater in Cangzhou area in 1980 and 2014. The distribution law and evolution simulation process of fluorine in deep groundwater of Cangzhou were studied. ArcGIS software was used to describe the plane distribution of fluorine in deep groundwater in Cangzhou area. The results show that the horizontal distribution of fluoride concentration in deep groundwater in Cangzhou area is the lowest in the west, followed by the central and central coastal areas, and increased to 50 percent of the total area in Cangzhou in 2014. The area of direct drinking groundwater resources is reduced. The horizontal hydrogeochemical model and solute transport model of deep groundwater in Cangzhou area were established by using PHREEQC software and MODFLOW software respectively. According to the distribution law of fluorine in deep groundwater in Cangzhou area, two sampling points with upstream and downstream relationship along the same flow path are selected. Based on the sampling data from 1980 and 2014, it is simulated that the source of the horizontal direction of the high fluorine water in the deep groundwater in Cangzhou area is the dissolving reaction of fluorite along the flow direction. By using the solute transport model of deep groundwater in Cangzhou area, the vertical migration of fluorine from the higher concentration of fluorine in the third aquifer in Cangzhou area was simulated. According to the concentration of fluorine ions in the third aquifer in 1980 and 2014, the fluorine solute transport model was used to predict the average concentration of fluorine ion in the third aquifer of Cangzhou area in 2030. The model of solute transport in the deep groundwater of Cangzhou area was used to predict the average concentration of fluorine ion in the third aquifer in Cangzhou area by 2030. It is expected that the fluorine content in the deep groundwater of Cangzhou will continue to increase under the condition of deep groundwater exploitation, and the long-term drinking of the residents in Cangzhou will have an impact on their health.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.3
[Abstract]:High fluorine content is one of the hydrochemical characteristics of deep groundwater in Cangzhou. In order to reflect the quantity of groundwater resources in Cangzhou area and reveal the mechanism of fluorine evolution in deep groundwater, this paper analyzes the variation of fluoride content in deep groundwater in Cangzhou area in 1980 and 2014. The distribution law and evolution simulation process of fluorine in deep groundwater of Cangzhou were studied. ArcGIS software was used to describe the plane distribution of fluorine in deep groundwater in Cangzhou area. The results show that the horizontal distribution of fluoride concentration in deep groundwater in Cangzhou area is the lowest in the west, followed by the central and central coastal areas, and increased to 50 percent of the total area in Cangzhou in 2014. The area of direct drinking groundwater resources is reduced. The horizontal hydrogeochemical model and solute transport model of deep groundwater in Cangzhou area were established by using PHREEQC software and MODFLOW software respectively. According to the distribution law of fluorine in deep groundwater in Cangzhou area, two sampling points with upstream and downstream relationship along the same flow path are selected. Based on the sampling data from 1980 and 2014, it is simulated that the source of the horizontal direction of the high fluorine water in the deep groundwater in Cangzhou area is the dissolving reaction of fluorite along the flow direction. By using the solute transport model of deep groundwater in Cangzhou area, the vertical migration of fluorine from the higher concentration of fluorine in the third aquifer in Cangzhou area was simulated. According to the concentration of fluorine ions in the third aquifer in 1980 and 2014, the fluorine solute transport model was used to predict the average concentration of fluorine ion in the third aquifer of Cangzhou area in 2030. The model of solute transport in the deep groundwater of Cangzhou area was used to predict the average concentration of fluorine ion in the third aquifer in Cangzhou area by 2030. It is expected that the fluorine content in the deep groundwater of Cangzhou will continue to increase under the condition of deep groundwater exploitation, and the long-term drinking of the residents in Cangzhou will have an impact on their health.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.3
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