玉符河强渗漏带黄河水回灌过程中含水层堵塞研究
发布时间：2019-05-18 11:30
【摘要】：为保证城市用水的供应和市区泉水的喷涌,济南市已经在市区西部和南部的泉域补水区开展了一系列的含水层补给管理(MAR)项目工程。然而,由于回灌水水质不理想,不管以何种方式进行地下水回灌都会面临着含水层堵塞的问题。本文针对利用黄河水进行地下水回灌过程中产生的含水层堵塞问题,研究区选择在济南市西南的玉符河强渗漏带区域。采用野外监测、取样化验和室内沙柱模拟试验相结合的方式,研究玉符河强渗漏带利用黄河水进行回灌过程中的含水层堵塞形式、堵塞影响因素、颗粒物来源与微观运动以及地下水回灌效果,同时野外监测的数据也能够对试验结果进行检验。本文取得的结论如下:(1)玉符河强渗漏带黄河水回灌过程中主要存在着含水层物理堵塞的风险,而其他如化学堵塞、生物堵塞和机械堵塞均不是本区域内含水层面临的主要问题。本区域内含水层物理堵塞的主要影响因素为颗粒物含量和回灌水水头高度,其中颗粒物包括内源性颗粒物和外源性颗粒物。(2)在沙柱堵塞方面,外源性颗粒物的浓度越大,沙柱堵塞的越快且越密实,外源性颗粒物浓度的增加会促进内源性颗粒物向下的移动和积累,外源性颗粒物浓度的高低不会影响稳定状态下的沙柱渗透系数;低水头条件更易加剧内源性颗粒物引起的堵塞,而高水头条件更易将颗粒物带入沙柱的较深层,造成沙柱的深层堵塞,从总体上来看,回灌水水头越高,造成的沙柱堵塞程度越大。在沙柱出流水水质方面,外源性颗粒物浓度的大小直接影响稳定状态下沙柱的出流浊度,浓度越大出流浊度也越大,内源性颗粒物的存在对于回灌过程中浊度的控制至关重要;回灌水的水头不会对稳定状态下沙柱的出流浊度产生影响。(3)试验后沙柱上层颗粒物质量达到了原沙的1.4倍,下层颗粒物质量为原沙的1.2倍,而中层颗粒物质量与原沙相差不大。外源性颗粒物主要积累在沙柱上层,而内源性颗粒物主要积累在沙柱下层,沙柱内细微颗粒物质量呈现出“两头大,中间小”的现象,玉符河强渗漏带含水层的较浅层与较深层的堵塞值得注意。从微观上来看,内源性细微颗粒物中粒径在1μm~10μm区间和50μm~74μm区间的细微颗粒物移动性较弱、整体表现出积累,而粒径在10μm~50μm区间内移动性较强、整体表现出外排,而外源性细微颗粒物的各个粒径区间在沙柱中的移动和积累则比较均匀。(4)观测井内地下水水位随着玉符河补水量的增加而升高,通过玉符河强渗漏带补充地下水水量取得了很好的效果;通过玉符河强渗漏带含水层的滤除作用,回灌水的水质得到了很大的改善;同时检测数据也验证了沙柱试验的结果,说明沙柱试验的结果可以在玉符河强渗漏带实地应用。(5)野外采集的原沙中细微颗粒物含量为5%左右,通过试验分析得到沙样堵塞最大细微颗粒物质量比为7.2%。从玉符河强渗漏带含水层结构的颗粒物容量以及堵塞的角度来讲,目前玉符河人工回灌工程运行“健康”,玉符河强渗漏带依然有着很长的回灌“寿命”。本文的研究结果对于本区域内的回灌工程的选址、回灌水量、回灌时间、回灌的安全性和持续性以及回灌后对于地下水环境和水质的影响都有着一定的指导意义,同样对于水文地质条件相似的地区也有着一定的参考价值。
[Abstract]:In order to ensure the supply of urban water and the surge of spring water, Jinan has carried out a series of water-bearing recharge management (MAR) project projects in the water-replenishing area of the spring area in the west and south of the city. However, since the water-return water quality is not ideal, the problem that the aquifer is blocked can be faced regardless of the manner in which the groundwater recharge is carried out. In the light of the problem of the water-bearing block that is produced in the process of groundwater recharge by using the Yellow River, the research area is selected in the area of the strong seepage zone of the jade in the southwest of Jinan. The method of combination of field monitoring, sampling test and indoor sand column simulation test is adopted to study the blocking form of the aquifer, the influencing factors, the source of the particulate matter and the micro-movement and the recharge effect of the groundwater during the recharge process by the yellow river water, At the same time, the data of field monitoring can also be tested for the test results. The results of this paper are as follows: (1) The risk of physical blockage of the aquifer is mainly in the process of the recharge of the Yellow River, while others, such as chemical blockage, biological blockage and mechanical blockage, are not the main problems facing the aquifer in the region. The main influencing factors of the physical blockage of the aquifer in the region are the particulate matter content and the height of the return water head, wherein the particulate matter includes the endogenous particulate matter and the exogenous particulate matter. (2) In the aspect of the blocking of the sand column, the greater the concentration of the exogenous particulate matter, the faster and more dense the sand column is blocked, and the increase of the concentration of the exogenous particulate matter can promote the downward movement and accumulation of the endogenous particulate matter, the concentration of the exogenous particulate matter does not affect the permeability coefficient of the sand column under the stable state; the low head condition is more likely to increase the blockage caused by the endogenous particulate matter, and the high water head condition is more likely to bring the particulate matter into the deeper layer of the sand column, so that the deep layer of the sand column is blocked, The higher the water head, the greater the clogging degree of the sand column. in that aspect of the water quality of the sand column, the concentration of the exogenous particulate matter is directly affect the discharge turbidity of the sand column in a stable state, the greater the concentration and the greater the turbidity, and the presence of the endogenous particulate matter is critical to the control of the turbidity in the recharge process; The head of the return water does not affect the discharge turbidity of the sand column in the steady state. (3) The mass of the upper layer of the sand column after the test is 1.4 times that of the original sand, and the mass of the lower layer is 1.2 times that of the original sand, and the mass of the middle layer particulate matter is not much different from that of the original sand. The exogenous particulate matter is mainly accumulated on the upper layer of the sand column, and the intrinsic particulate matter is mainly accumulated in the lower layer of the sand column, and the mass of the fine particles in the sand column shows the "The two ends are big, the middle is small" phenomenon, and the shallow and deeper blockage of the strong leakage zone of the Yulian river is worth noting. The particle size of the endogenous fine particles in the interval of 1. m to 10. m u.m and the interval of 50. m to 74. m And the movement and accumulation of the particles of the exogenous fine particles in the sand column are more uniform. (4) The water level of the groundwater in the observation well is increased with the increase of the amount of the water of the jade and the water of the underground water is supplemented by the strong seepage of the jade. The results of the sand column test are also verified by the data, and the results of the sand column test show that the results of the sand column test can be applied in the field of the strong leakage of the jade. And (5) the content of the fine particles in the raw sand collected in the field is about 5 percent, and the mass ratio of the sand-like blocking maximum fine particulate matter is 7.2 percent through the test analysis. In terms of the particle capacity and the blocking angle of the water-bearing structure of the strong seepage of the Yulian River, the present "health" of the artificial recharge of the Yufu River and the strong leakage zone of the Yulian River still have a long reinjection "life". The results of this paper are of great significance to the site selection of the recharge project in the region, the recharge volume, the recharge time, the safety and the continuity of the recharge, and the effect of the recharge on the groundwater environment and the water quality. It also has a certain reference value to the area similar to the hydrogeology condition.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P641.25
[Abstract]:In order to ensure the supply of urban water and the surge of spring water, Jinan has carried out a series of water-bearing recharge management (MAR) project projects in the water-replenishing area of the spring area in the west and south of the city. However, since the water-return water quality is not ideal, the problem that the aquifer is blocked can be faced regardless of the manner in which the groundwater recharge is carried out. In the light of the problem of the water-bearing block that is produced in the process of groundwater recharge by using the Yellow River, the research area is selected in the area of the strong seepage zone of the jade in the southwest of Jinan. The method of combination of field monitoring, sampling test and indoor sand column simulation test is adopted to study the blocking form of the aquifer, the influencing factors, the source of the particulate matter and the micro-movement and the recharge effect of the groundwater during the recharge process by the yellow river water, At the same time, the data of field monitoring can also be tested for the test results. The results of this paper are as follows: (1) The risk of physical blockage of the aquifer is mainly in the process of the recharge of the Yellow River, while others, such as chemical blockage, biological blockage and mechanical blockage, are not the main problems facing the aquifer in the region. The main influencing factors of the physical blockage of the aquifer in the region are the particulate matter content and the height of the return water head, wherein the particulate matter includes the endogenous particulate matter and the exogenous particulate matter. (2) In the aspect of the blocking of the sand column, the greater the concentration of the exogenous particulate matter, the faster and more dense the sand column is blocked, and the increase of the concentration of the exogenous particulate matter can promote the downward movement and accumulation of the endogenous particulate matter, the concentration of the exogenous particulate matter does not affect the permeability coefficient of the sand column under the stable state; the low head condition is more likely to increase the blockage caused by the endogenous particulate matter, and the high water head condition is more likely to bring the particulate matter into the deeper layer of the sand column, so that the deep layer of the sand column is blocked, The higher the water head, the greater the clogging degree of the sand column. in that aspect of the water quality of the sand column, the concentration of the exogenous particulate matter is directly affect the discharge turbidity of the sand column in a stable state, the greater the concentration and the greater the turbidity, and the presence of the endogenous particulate matter is critical to the control of the turbidity in the recharge process; The head of the return water does not affect the discharge turbidity of the sand column in the steady state. (3) The mass of the upper layer of the sand column after the test is 1.4 times that of the original sand, and the mass of the lower layer is 1.2 times that of the original sand, and the mass of the middle layer particulate matter is not much different from that of the original sand. The exogenous particulate matter is mainly accumulated on the upper layer of the sand column, and the intrinsic particulate matter is mainly accumulated in the lower layer of the sand column, and the mass of the fine particles in the sand column shows the "The two ends are big, the middle is small" phenomenon, and the shallow and deeper blockage of the strong leakage zone of the Yulian river is worth noting. The particle size of the endogenous fine particles in the interval of 1. m to 10. m u.m and the interval of 50. m to 74. m And the movement and accumulation of the particles of the exogenous fine particles in the sand column are more uniform. (4) The water level of the groundwater in the observation well is increased with the increase of the amount of the water of the jade and the water of the underground water is supplemented by the strong seepage of the jade. The results of the sand column test are also verified by the data, and the results of the sand column test show that the results of the sand column test can be applied in the field of the strong leakage of the jade. And (5) the content of the fine particles in the raw sand collected in the field is about 5 percent, and the mass ratio of the sand-like blocking maximum fine particulate matter is 7.2 percent through the test analysis. In terms of the particle capacity and the blocking angle of the water-bearing structure of the strong seepage of the Yulian River, the present "health" of the artificial recharge of the Yufu River and the strong leakage zone of the Yulian River still have a long reinjection "life". The results of this paper are of great significance to the site selection of the recharge project in the region, the recharge volume, the recharge time, the safety and the continuity of the recharge, and the effect of the recharge on the groundwater environment and the water quality. It also has a certain reference value to the area similar to the hydrogeology condition.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P641.25
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