【作者】 高立；

【导师】 林学钰；

【作者基本信息】 吉林大学 ， 水文学及水资源， 2007， 硕士

【摘要】 本文以常州地区水文地质资料为基础,系统分析了在常州地区进行地下水流数值模拟的可行性及必要性。考虑到研究区水文地质资料日益增多,管理和检索模拟时所需要的数据日益困难,因此利用数据库技术建立常州地区水文地质资料数据库,辅助地下水流数值模拟。同时还利用网络数据库技术及WebGIS技术建立的网络发布体系,实现研究区水文地质资料及模拟流场的网络发布、远程共享。论文主要研究了在GMS平台下如何建立研究区地下水流模型,如何建立随机模型预测研究区内一类给定水头边界的水位值,最终通过随机模型与地下水流模型的耦合,预测到2010年地下水恢复情况及变化趋势。经模拟预测结果表明:自在常州地区实施全面禁采方案之后,研究区内Ⅱ承压含水层地下水位得到全面回升,从2000年至2010年,除长江边原来地下水位较高地段外,常州地区Ⅱ承压水水位普遍升高5m左右,漏斗中心的水位从-77m回升到-72m。此外,为了要实现数值模拟流场的网络发布,论文还重点研究如何将GMS所模拟的流场转换为以shapefiles文件格式存储流场;如何基于ArcIMS建立WebGIS系统,实现研究区水文地质资料中空间数据及经数据转换后地下水流场的网络发布。更多还原

【Abstract】 Changzhou area is located in the Yangtze River Delta hinterland. With the expanding of cities’scales and the economic rapid development, the water consumptions of industry, agriculture and domestic are increasing constantly, and groundwater has been in a state of continuous excessive extraction which constrains the economic sustainable development seriously in Changzhou area. Changzhou government has adopted a series of plans including compressing pumping and prohibiting pumping to solve this problem since 2000 year. In 2005, the government prohibited pumping groundwater in Changzhou entire area. In order to forecast the dynamic changing trends of groundwater level and quantitatively predict the recovery of groundwater level in the near future, as well as provide a scientific basis for rational pumping and utilizing groundwater resources, it is very significant to adopt numerical simulation of groundwater flow in Changzhou area.With the continuous improvements of research methods and the continuous progress of the investigation, the data which were needed in numeric simulation or can be got by investigation increase geometricly. So the database technology was adopt to manger the hydrogeological data in study area and assist the numeric simulation.The compressing pumping plan and prohibiting pumping plan is not only decided by government but also focused by the public. So the Web-Database technology and the WebGIS technology which are developing quickly in recent years , were used in this dissertation to release the hydrogeological data and the forecasted results of groundwater simulation. It can not only provide intuitively the dynamic changing trend of groundwater for society public in time, but also supply certain shareable data and fruit used for reference for future continuous study in Changzhou area.Changzhou area is selected as study area, and in order to make the groundwater system relatively independent, some areas along the Yangtze River in Jangyin were included in the study area. Because the first confined aquifer sporadic distributes along the Yangtze River, only the second and the third confined aquifer were simulated. Groundwater was pumped mainly from the second aquifer, so the second confined aquifer was focused on in the process of simulation.The main results of this thesis are as follows:1、A hydrogeological database was established by using Visual Basic programming language and SQL Server2000 database management system. Its main functions include:①Providing an effective means for storing and updating the hydrogeological data in the study area;②Searching the data quickly, which is needed by numeric model.2、A numeric model of groundwater flow was established. The identifying time of the model is from 1 July to 1 August in 1995. After identifying and verifying the model, the numerical model can reflect the actual hydrogeological conditions; the model can be used to forecast the groundwater level in future.3、The groundwater level in the administrative boundary between Changzhou and Wuxi was forecasted. This boundary is the first type of boundary. In order to forecast the changing trend of groundwater level in the future, forecasting the water level in this boundary was needed firstly. By analyzing the hydrogeological conditions, groundwater yield has dominant influence on water level at the boundary. So the water level in this boundary in the future can be forecasted by building a stochastic model using the mining amount of groundwater , the history water level in last year and the water level in current year. The water level in 2007 to 2010 was predicted by using regression analysis method and building regression equations.4、The groundwater level was predicted by numeric model of groundwater flow which began from 1 July in 2005 to 2010, based on the simulated water level in the first type of boundary forecasted. The results of the model show that the groundwater of the second aquifer recovers full-scale in the study area after carrying out the plan of prohibiting mining from 2005 year to 2010 year and the water level ascend about 2.5 meters in the second aquifer except the areas along the Yangtze River, where the water level is high. The water level in depression cone ascends from -77 meters to -72 meters.5、A release system on the internet was established by using Web—Database technology and the WebGIS technology. It helps to release the hydrogeological data and the groundwater fields simulated by the numeric model. The public can search the changing trend of groundwater level clearly in time form the release system; the other hydrogeological researchers also can get the hydrogeological data and reference from the release system.6、The groundwater fields which was exported by GMS were changed into the shapefiles format. The data of groundwater fields was re-organized by using Visual C++ programming language and the isoline of groundwater flow was generated by using this algorithm of generating the isoline based on grid. At last, changing the isoline into shapefiles format by using MapObjects.更多还原