含水层

The Karsts, fault and the water bearing fracture belts on the upper covering of the mineral bodies are shown clearly in CSAMT profiles. It is obviously the results are the helpful documents for preventing water bursting...

矿体上盘灰岩中的溶洞、断层、含水破碎带以及可能的与含水层的联系在成果图上反映的非常清晰，为矿山进行水隐患治理提供了一份明确的资料

The compaction released water karsts are formed under the middle-deep buried surroundings are a process of the dissolution role between compaction released water contained organic acid and carbonate rock, are final production of karstification roles.

鄂尔多斯盆地的压释水岩溶是在中深埋藏条件下，富含有机酸的压释水渗入碳酸盐岩含水层所产生的溶蚀作用过程及岩溶化结果。

Environmental Protection Office of the State of New York on the 22nd release of the study found that, although in 2004 in New York have banned the use of methyl tert-butyl ether, but the pollution remains a threat to drinking water supply to Long Island aquifer.

环境保护的纽约州办事处对22日公布的研究发现，虽然在2004年在纽约已禁止使用甲基叔丁基醚，但污染仍然是饮用水供应构成长期的威胁岛的含水层。

The assessment result shows: the infirm zone of the aquifer basically distributes in the limestone area of low Ordovician -top Cambrian, which the cranny is uncovered and overgrown, the area is also the direct recharge area of spring basin. In addition , in the rivers valley area of Jin xiuchuan and Bei sha river, because the leakage of the river is serious, the contamination can leak easily to the groundwater in the area of surface and near the river, so this area also is the infirm zone. Frail zone distributes in the uncovered area of mid-Cambrian which the canny upgrowth is commonly, parts of the zone distributes the relatively impervious layer such as shale. In the north-west area where is the down-rivers of two rivers, the alluvium is thick, the protection to the limestone is good.

评价结果显示，济南岩溶泉域含水层很脆弱区基本分布在济南泉域的岩溶裂隙非常发育的、裸露的下奥陶～上寒武的石灰岩地区，该地区也是泉域的直接补给区，另外在锦绣川、北沙河等河谷地带，由于河床渗漏严重，地表水及近河地带污染物容易渗入地下，也为很脆弱区；脆弱区一般分布在裸露的中寒武地层区，岩溶裂隙发育一般，部分地带分布有页岩等相对隔水层；西北部两河下游冲积层较厚，对下伏石灰岩保护功能较强，属于脆弱性相对很低区。

The presentation introduces conditions, features and difficulties in the recovery project of Shanghai Metro Line 4, by stating cons and pros of overall proposal of recovery design, the safeness of support and bracing structure for hyper deep foundation, influence of mid-river cofferdam on existing sound tunnel and hyper deep foundation, structural design selection for connection section of the mined tunnel, water-proofing option for hyper deep foundation in confined aquifer soil.

报告介绍了上海地铁4号线修复工程建设条件、特点和难点，陈述了对修复设计总体方案取舍、超深基坑支护结构安全度、江中围堰对完好隧道及超深基坑的影响、暗挖连接段的结构设计方案选择、处于承压含水层中的超深基坑的结构防水等内容。

Outline of the Presentation The presentation introduces conditions, features and difficulties in the recovery project of Shanghai Metro Line 4, by stating cons and pros of overall proposal of recovery design, the safeness of support and bracing structure for hyper deep foundation, influence of mid-river cofferdam on existing sound tunnel and hyper deep foundation, structural design selection for connection section of the mined tunnel, water-proofing option for hyper deep foundation in confined aquifer soil.

报告内容介绍报告介绍了上海地铁4号线修复工程建设条件、特点和难点，陈述了对修复设计总体方案取舍、超深基坑支护结构安全度、江中围堰对完好隧道及超深基坑的影响、暗挖连接段的结构设计方案选择、处于承压含水层中的超深基坑的结构防水等内容。

The corresponding geological, hydrogeological and professional models are set up by using the immersion sense, interaction with computer as well as realtime forecast function of VRT so that hydrogeological conditions, groundwater flow, groundwater quality , environmental geological problems such as land subsidence, sea water intrusion, soil desertification, soil salinizationalkalization, swampiness and the development tendency of cone of depression caused by groundwater exploitation, can be represented in the virtual environment.

利用虚拟现实技术沉浸感、与计算机的交互功能和实时表现功能，建立相关的地质、水文地质模型和专业模型，进而实现对含水层结构、地下水流、地下水质和环境地质问题（例如地面沉降、海水入侵、土壤沙漠化、盐渍化、沼泽化及区域降落漏斗扩展趋势）的虚拟表达。

Third, the movement of flow and solutes strongly coupled with the density and viscosity.

数值模拟是研究含水层中污染物运移的有力工具和有效途径。

For each strategy, a corresponding exploitation plan of groundwater was designed. Then each designed exploitation plan (except scheme 3) was put into the model for calculation and simulation. The analysis on the forecasting results every plan indicates that:(1) Shuting down the self-provided wells is the most direct and effective method, playing an important role in the land subsidence prevention.(2) The resumption of compressed soil by groundwater artificial recharge is limited. So the artificial recharge can\'t provide essential effect for the resumption of land subsidence, unless the artificial recharge is much more than the groundwater withdrawal.(3) The method of "adjusting the exploitation stratum of groundwater to the shallow" has an obvious effect on the land subsidence prevention.(4)"Sand wells" can increase the leakage recharge for confined aquifer, and thus can slow and prevent the development of the land subsidence.(5) For the groundwater exploitation in Xi\'an, emergency self-provided wells should be managed according to the well spacing of 1600m, 2000m and 1600m, respectively, in the river terrace area, alluvial-proluvial fan area and loess tableland area to exploit the first confined groundwater. Corresponding individual well yield can be set as 2500m~3/d, 1500 m~3/d and 200 m~3/d. Make emergency self-provided wells pump in the dry year and stop pumping groundwater to restore and conserve underground water sources in average years and wet years. In this way, groundwater withdrawal of 162000m~3/d can be obtained to provide for the supplement of water supply in Xi\'an. As a result, the water supply stress can be released in dry years. The groundwater depression formed in the exploiting year can resume in 3-4 years. At the same time, this exploitation manner will not lead to obvious land subsidence.

本文利用所建的模型预测了现状开采条件下未来20年的地下水位和地面沉降的变化，在此基础上，提出了防治西安市地面沉降的五个地下水开采方案，利用所建的地面沉降模型对各个设计方案其进行了模拟和预报，对预测结果的分析表明：①封停自备井是防治地面沉降最为直接和最有效的对策，对防治地面沉降起着最为积极的作用；②采用人工回灌方法使被压缩的土层得到的恢复是非常有限的，对地面沉降不能起到根治作用，只有回灌量明显大于开采量时才能有一定的效果；③&调整开采层次，在浅层取水&对防治地面沉降的效果十分明显；④布设&砂井&可以增加对承压含水层的越流补给量，从而可以有效地缓解和控制地面沉降的发生和发展；⑤对西安市的地下水开采，可在河流阶地区、冲洪积扇区和黄土塬区分别采用1600m、2000m、1600m的井间距布置应急自备井，分别采用2500m~3/d、1500 m~3/d和200 m~3/d的单井开采量，开采第一承压水，在平水年或者丰水年不开采，涵养地下水源，在枯水年启动这些应急自备井开采，在输出分析范围内共可获得162000 m~3/d(5913万m~3/a)开采量，可以有效地补充西安市的供水水源，缓解供水紧张局面，开采年开采导致的下降的水位可在停采3～4年后得到基本恢复，同时，这种开采方式不会造成大的地面沉降量。

The better surface ecological system will increase the microbiles, breath of vegetation roods and CO2 in the soil, these are

当地表生态系统很好时，土壤中的微生物量、植物根系的呼吸量及 CO2量均很高，这导致表层喀斯特含水层水中的钙含量和 HCO3量均很高，到洞穴中有利产生丰富的碳酸钙沉积景观。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。