共查询到20条相似文献，搜索用时 271 毫秒
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基于数值模拟技术以象山矿11#煤底板奥灰含水层放水试验成果为基础,深入分析与合理概化水文地质条件,采用三维地下水模拟软件Visual MODFLOW建立研究区地下水系统的三维数值模型。经过模型的校正分析,认识矿井水文地质条件,反演得出含水层主要水文地质参数,最终合理的预测了该矿井11#煤研究区底板带压涌水量及首采面奥灰含水层涌水量。 相似文献
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北京市平原区地下水流动数值模型应用研究 总被引：1，自引：0，他引：1
以北京市平原区地下水系统作为研究对象,系统地收集整理了相关的地质和水文地质资料,通过对资料的综合分析,对边界条件、含水层结构等进行合理概化,建立了水文地质概念模型。在此基础上,运用MODFLOW软件建立了北京市平原区地下水流动的三维数值模型。模型垂向上剖分为10层,平面上每层剖分为499行×499列不规则矩形网格,有效单元共计1 103 000个,以刻画复杂的含水层结构和地下水三维流动特征。依据实测地下水位数据进行模型参数识别与校正,绝大多数计算水位与实测水位拟合较好,模拟流场与实测流场吻合,参数符合水文地质条件,表明本研究建立的数值模型能够较好地刻画北京平原区地下水流动特征。 相似文献
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研究主要目的是以数值模拟的方法,再现选定的研究区域20世纪70~90年代地下水位处于较低水平的过程并推求地下水的补给过程。研究区为某流域入海口前10×12km2的矩形区域,基于研究区土层纵断面的物理条件,在平面二维的基础上,考虑含水层垂向水收支成分,利用地下水计算的基本方程式开发地下水准三维数值计算模型,以数值模拟的方法验证模型效率。对地下水位数值模拟的结果表明,模型效率可以达到80%以上。基于1966~2005年的数值计算结果,推求了研究区各含水层的补给过程。研究结果可为区域性地下水数值模拟技术及地下水资源量的评估等研究提供方法上的借鉴。 相似文献
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Ground Water Vistas软件是目前国际上盛行的三维地下水水流和溶质运移模拟的图形使用界面.本文介绍了Ground Water Vistas在三种模式下的功能,分析评述了它的优缺点.并以美国Edwards含水层Barton泉稳定流模型为实例,展示了Ground Water Vistas强大的前处理、后处理功能及其优良的三维可视化效果.Edwards含水层喀斯特发育程度极高,其模型研究对我国喀斯特地区地下水资源的评价与管理具有借鉴意义和指导作用. 相似文献
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地下水数值模拟是目前定量研究地下水水量和水质的重要手段。使用基于随机理论的MonteCarlo方法来进行地下水数值模拟。这种方法能较好地考虑水文地质参数的空间变异性。主要将MonteCarlo方法和确定性模型模拟方法的模拟结果在渗透系数场、水头场、速度场和浓度场等方面进行了比较。结果表明:在模拟三维非均质含水层中的溶质运移问题时,充分考虑了含水层渗透系数空间变异性的MonteCarlo法比确定性方法更为有效,模拟精度提高了很多,且对模拟误差及误差来源有合理的数学解释。 相似文献
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郑州北郊水源地地下水流三维有限元模拟 总被引：3，自引：1，他引：3
本文从傍河水源地地下水流动的三维特征分析入手，结合三维有限元数值模型，模拟了两组大型抽水试验，识别和反求含水层参数，进一步对地下水开采方案进行了评价。 相似文献
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基于VTK的地下水数值模拟三维可视化开发应用 总被引：1，自引：0，他引：1
本文应用Kitware公司Visualization Toolkit(VTK),开发地下水数值模型可视化建模及数据处理的三维可视化方法.利用美国地质调查局三维地下水数值计算模型MODFLOW的数据,构建VTK类库定义的vtkStructruredGrid、vtkUnstructuredGrid及vtkPolyData数据集类型对象及VTK流水线.以河南省安阳市小南海泉域地下水可视化模拟系统开发为例,实现图像绘制、等水头线生成、筛选及剪切交互处理. 相似文献
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Sandstone is a common lithology in a number of groundwater reservoirs. Studying the skeleton sandstone architectural units, therefore, lays the basis for characterizing aquifer systems, groundwater quality, and resource evaluation. This comprehensive analysis of Cretaceous aquiferous sandstones in the Ordos basin, China, shows that there exists a basin-scale skeleton sandstone in the Luohe Formation which contains 11 isolated barrier beds, 12 small skeleton sandstone bodies in Huanhe Formation, and 3 in the Luohandong Formation. The spatial structure and superimposed relationship as well as the medium properties of these skeleton sandstones and isolated barrier beds can be shown by 3D visualization models. Simultaneously, resource quantity can be evaluated with the 3D inquiry functions. The comparison between property models and structural models indicates that the salinity of groundwater of the Luohe Formation has a close connection with the locations of isolated barrier beds that contain abundant gypsum. Through quantitative calculation, groundwater resource of the Cretaceous Luohe and Luohandong formations is estimated to be 1.6×10~(12) m~3, and the total groundwater resource of the Cretaceous system in the Ordos basin is more than 2×10~(12) m~3. 相似文献
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沙曲井田位于山西河东煤田离柳矿区的中部,处在柳林泉域岩溶水系统的径流区。矿区奥灰水水量大,水位标高为+797～+802m,其中的4#煤底板承受奥灰水压2～5MPa,10#煤底板承受奥灰水压3～6MPa,属带压开采矿井。利用井田以往的地质及水文地质勘探资料,应用GMS软件建立矿区三维立体模型和地下水渗流的数学模型,实现水文地质结构三维可视化,使数学模型能正确地反映预测区的水文地质条件,达到数值仿真效果;应用有限差分数值法,对开采上组煤(3#+4#)和下组煤(8#+9#、10#)时,石炭系太原组灰岩含水层和奥陶系峰峰组含水层的疏降进行矿井涌水量预测,为矿井的安全生产和防治水工作提供依据。 相似文献
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Tauseef Ahmad Ansari Yashwant B. Katpatal A. D. Vasudeo 《Arabian Journal of Geosciences》2016,9(4):325
Groundwater management requires complete visualization of aquifer characteristics to understand scientific aspects and hence remains a challenge, especially in hard rock terrains. In the present research paper, a comprehensive approach using 3D stratigraphic model, fence diagrams and numerical modeling has been proposed to understand the groundwater status for effective recharge. The stratigraphy, groundwater flow, and groundwater fluctuations for the period 1999–2010 were analyzed. The total volume of formations, volume of voids, storage capacity, and quantities of recharge of unconfined aquifer system in the Nagpur urban area were estimated. The steady state groundwater flow model of Basalt formation was calibrated to evaluate the subsurface system using Processing Modflow (PMWIN 5.3.2). The calibrated hydraulic head is compared with field observed head. The comparative spatial analysis presents a simple integrated approach in identifying zones with falling groundwater trends suitable for groundwater recharge in hard rock terrain in Nagpur urban area. 相似文献
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河北平原地下水氢、氧、碳、氯同位素组成的环境意义 总被引：15，自引：0，他引：15
地下水是古气候信息的载体，它的化学成分和同位素组成可以反映古气候的演变。应用３Ｈ、１４Ｃ和３６Ｃｌ资料计算的河北平原地下水的年龄如下：第１含水组（Ｑ４）０～３ｋａ，第２含水组（Ｑ３）３～１００ｋａ，第３含水组（Ｑ２）１００～３００ｋａ，第４含水组（Ｑ１）３００～７００ｋａ。根据δ１８Ｏ和δＤ计算的地下水补给期的地面平均气温表明，第四纪以来河北平原气候环境是逐渐变暖的。根据第４至第１含水组（Ｑ１～Ｑ４）地下水δＤ＝－７０‰的等值线变化，认为第四纪以来，渤海海岸线逐渐由东向西移动。 相似文献
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Three-dimensional geologic modeling and visualization of the Virttaankangas aquifer,southwestern Finland 总被引：1，自引：1，他引：1
Aki Artimo Joni Mäkinen Richard C. Berg Curtis C. Abert Veli-Pekka Salonen 《Hydrogeology Journal》2003,11(3):378-386
A need exists for a reliable and long-term water supply for the 285,000 inhabitants of the Turku area in southwestern Finland.
In response to this need, there are plans to replace the present water supply from the surface sources with artificially infiltrated
groundwater from a Quaternary esker aquifer called the Virttaankangas aquifer. New sedimentological studies of the Virttaankangas
area have revealed the complexities of the esker system and its surrounding glacial, glaciofluvial, and glaciolacustrine geology.
This led to the characterization of the hydrogeological units of the aquifer, the result of which has been a three-dimensional
(3-D) truly integrated solids model that represents the geometry, interrelationships, and hydrostratigraphy of the study area.
The 3-D model was made with EarthVision geologic modeling software. The 3-D geological model of the Virttaankangas aquifer
can be used for planning the infiltration of river water into the aquifer and to understand the geologic and geographic boundaries
of the hydrogeologic units hosting the groundwater reserve and the geologic relationships between the units. Another major
outcome of this study is a powerful visualization tool that will be provided to municipal and government authorities who must
understand the geologic complexities involved with water-resource planning prior to their decision making.
Electronic Publication 相似文献
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Using three-dimensional geological mapping methods to inform sustainable groundwater development in a volcanic landscape, Victoria, Australia 总被引：1，自引：1，他引：0
Bruce Gill Don Cherry Michael Adelana Xiang Cheng Mark Reid 《Hydrogeology Journal》2011,19(7):1349-1365
This study investigated the use of three-dimensional (3D) geological methods to provide better groundwater resource estimates for the Spring Hill area in central Victoria, Australia. Geological data were gathered in 3D geological software, which was utilised to derive fundamental dimensional parameters of the groundwater system in the study area. Mining industry software and hydrogeological methods were combined to give volumetric determinations of the basalt aquifer that were used to improve estimates of the groundwater resource. The methods reduce uncertainty about the physical attributes of the aquifer systems and greatly improve conceptual understanding of their behaviour. A simple numerical water-balance model was developed to refine the estimates of aquifer volume and fluxes to approximate observed water-level behaviour in the area. This enabled a much better comparison of groundwater resource use to the natural inputs and outputs for the area. A key conclusion was that the main issues for sustainable development and use in the study area are more to do with the physical aspects of the aquifer system, rather than simply the volume of water pumped. Visualisations of the area’s hydrogeology also provide improved hydrogeological understanding and communication for groundwater users and administrators. 相似文献
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同位素技术是研究区域地下水循环规律的主要手段之一。本文对平原区地下水进行了取样分析,运用同位素技术并结合水文地质条件,研究了北京市平原区地下水循环演化规律。运用^3H和^14C的测年技术确定了地下水年龄;利用D和18^O关系曲线探讨了地下水的起源;按照是否积极参加了现代水循环的原则将第四系地下水划分为浅层水和深层水;对浅层水和深层水的更新状况进行了研究。研究表明,浅层水广泛分布于北京平原区,径流条件好,更新快;深层水主要分布于永定河、潮白河冲洪积扇下部及冲洪积平原的深部地区,补给条件相对差,与现代大气降水联系弱,径流条件差,更新慢。 相似文献
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含水层结构和地下水面形态的虚拟模拟——以苏锡常地区为例 总被引：4，自引：2，他引：2
利用Visual C++作为虚拟苏锡常地区第四系含水层结构和地下水面形态的开发工具,采用OpenGL对它们进行三维可视化表达,研究者可采用不同的显示方式对含水层和地下水面进行观察,了解各地层间的空间分布特征、含水层间的补给关系、地下水面的形态和水平方向上地下水补给区和排泄区的分布情况,以及地下水面的动态演示过程。 相似文献
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地下水流场三维可视化研究进展与前景 总被引：3，自引：2，他引：1
在系统回顾近10年来地下水流场三维可视化主要研究成果的基础上,结合笔者的研究实践,综述了地下水流场三维可视化研究进展。从三维表现形式上,把地下水流场的三维可视化表达方法分为5类：准三维写意可视化、准三维制图可视化、三维体视化、混合可视化和立体可视化。分别论述了每种方法的几何模型、空间分析和绘制技术等,并分析了三维可视化技术在地下水流场研究中的应用前景。 相似文献
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B. M. S. Giambastiani A. M. McCallum M. S. Andersen B. F. J. Kelly R. I. Acworth 《Hydrogeology Journal》2012,20(6):1027-1044
A FEFLOW three-dimensional (3D) groundwater model is developed to enhance the understanding of groundwater processes in the complex alluvial stratigraphy of Maules Creek Catchment (New South Wales, Australia). The aquifer vertical heterogeneity is replicated by indexing 204 lithological logs into units of high or low hydraulic conductivity, and by developing a 3D geological conceptual model with a vertical resolution based on the average lithological unit thickness for the region. The model mesh is populated with the indexed geology using nearest neighbour gridding. The calibrated model is successful in simulating the observed flow dynamics and in quantifying the important water-budget components. This indicates that the lateral groundwater flow from the mountainous region is the main inflow component of the system. Under natural conditions, the Namoi River acts as a sink of water, but groundwater abstraction increasingly removes a large amount of water each year causing dewatering of the system. The pumping condition affects the river–aquifer interaction by reversing the flow, from gaining to losing river conditions during the simulation period. The procedure is relevant for the development of groundwater models of heterogeneous systems in order to improve the understanding of the interplay between aquifer architecture and groundwater processes. 相似文献