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首页> 外文期刊>Arabian journal of geosciences >Application of numerical modeling for groundwater flow and contaminant transport analysis in the basaltic terrain, Bagalkot, India
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Application of numerical modeling for groundwater flow and contaminant transport analysis in the basaltic terrain, Bagalkot, India

机译：数值模型在玄武岩地带地下水流量和污染物迁移分析中的应用，印度巴加尔科特

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摘要

A three-dimensional steady-state finite difference groundwater flow model is used to quantify the groundwater fluxes and analyze the subsurface hydrodynamics in the basaltic terrain by giving particular emphasis to the well field that supplies domestic, agricultural, and industrial needs. The alluvial aquifer of the Ghatprabha River comprises shallow tertiary sediment deposits underlain by peninsular gneissic complex of Archean age, located in the central-eastern part of the Karnataka in southern India. Integrated hydrochemical, geophysical, and hydrogeological investigations have been helped in the conceptualization of groundwater flow model. Hydrochemical study has revealed that groundwater chemistry mainly controlled by silicate weathering in the study area. Higher concentration of TDS and NO_3-N are observed, due to domestic, agriculture, and local anthropogenic activities are directed into the groundwater, which would have increased the concentration of the ions in the water. Groundwater flow model is calibrated using head observations from 23 wells. The calibrated model is used to forecast groundwater flow pattern, and anthropogenic contamination migration under different scenarios. The result indicates that the groundwater flows regionally towards the south of catchment area and the migration of contamination would be reached in the nearby well field in less than 10 years time. The findings of these studies are of strong relevance to addressing the groundwater pollution due to indiscriminate disposal practices of hazardous waste in areas located within the phreatic aquifer. This study has laid the foundation for developing detailed predictive groundwater model, which can be readily used for groundwater management practices.
机译：通过特别强调满足家庭，农业和工业需求的井场，使用三维稳态有限差分地下水流模型对地下水流量进行定量，并分析玄武岩地形中的地下流体动力学。 Ghatprabha河的冲积含水层由位于印度南部卡纳塔克邦中东部的阿尔基斯时代的半岛片麻岩复合体所覆盖，包括浅层第三纪沉积物。综合的水化学，地球物理和水文地质调查已有助于地下水流模型的概念化。水化学研究表明，研究区域的地下水化学主要受硅酸盐风化作用控制。由于家庭，农业的原因，观察到较高的TDS和NO_3-N浓度，并且将人为活动引入了地下水，这将增加水中离子的浓度。地下水流量模型使用23口井的水头观测仪进行了校准。校准后的模型用于预测地下水流型以及不同情况下的人为污染迁移。结果表明，地下水区域性地流向集水区的南部，在不到10年的时间里，污染物的迁移将在附近的井场中达到。这些研究的结果与解决由于在地下蓄水层内的区域中随意处置危险废物而造成的地下水污染具有重大意义。该研究为开发详细的预测性地下水模型奠定了基础，该模型可轻松用于地下水管理实践。

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