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Book ChapterDOI

Minimizing the Impact of Groundwater Pumping on the Environment: Optimization Strategies

01 Jan 2020-pp 69-84

Abstract: Long-term Groundwater pumping alters the environment and groundwater availability and thus affecting both the local and regional environment in a significant way. There are many purposes for which the groundwater has been abstracted in large quantity thus creating an unscientific way of management of the groundwater, leading to jeopardizing the sustainability of groundwater availability on a long-term basis. In this paper, we would be discussing one case study dealing with the groundwater modeling of open-cast mines with the development of an Integrated groundwater model to evaluate the impact of mining and the irrigated agriculture in the surrounding environs, on the groundwater status as well as to determine the time-period/year when the newly proposed mines without any increase in total pumping of groundwater. The study includes estimating groundwater recharge and developing a three‐dimensional steady‐state groundwater flow model exclusively for mine pumping simulation. The model has been utilized to evaluate the impacts of changes in groundwater pumping under the mine expansion scenario. In addition, simulation runs were made with the developed model to assess the impacts of recharging into the aquifer systems through the proposed recharge structures on groundwater and the surrounding environments and for various scenarios that vary depending upon the current as well as on the future conditions of water use. The other case study was in connection with the dewatering optimization in a metro rail tunneling construction. The requirement of maximum allowable drawdown necessitates the need for pumping and injection simultaneously and the optimal pumping wells and recharge wells location as well as the quantum of pumping and injection have been arrived at for 5 typical tunnel construction locations in a metro city of India. The engineering lessons learned, and the environment-friendly groundwater pumping plans are the major outcomes of these research works, which would be highlighted.
Topics: Groundwater model (71%), Groundwater flow (65%), Groundwater recharge (65%), Groundwater (60%), Aquifer (56%)
References
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Book
01 May 1982-
Abstract: Introduction to Groundwater Modeling presents an overview of the fundamental concepts and applications of computerized groundwater modeling.

385 citations


Journal ArticleDOI
Yangxiao Zhou1, Wenpeng LiInstitutions (1)
Abstract: Significant advances in regional groundwater flow modeling have been driven by the demand to predict regional impacts of human inferences on groundwater systems and associated environment. The wide availability of powerful computers, user friendly modeling systems and GIS stimulates an exponential growth of regional groundwater modeling. Large scale transient groundwater models have been built to analyze regional flow systems, to simulate water budget components changes, and to optimize groundwater development scenarios. This paper reviews the historical development of regional groundwater modeling. Examples of Death Valley and Great Artesian Basin transient groundwater models are introduced to show the application of large scale regional groundwater flow models. Specific methodologies for regional groundwater flow modeling are descried and special issues in regional groundwater flow modeling are discussed.

135 citations


Journal ArticleDOI
01 Mar 2003-Ground Water

122 citations


01 Jan 2011-
Abstract: 在地区性的地下水流动建模的重要进展被需求驾驶了在地下水系统上预言人的推论的地区性的影响并且联系环境。强大的计算机的宽可获得性,用户友好建模系统和 GIS 刺激地区性的地下水建模的指数的生长。短暂地下水建模的大规模被造了分析地区性的流动系统,以模仿水预算部件变化,并且优化地下水开发情形。这份报纸考察地区性的地下水建模的历史的发展。死亡山谷和短暂地下水建模的大自动流出的盆的例子被介绍显示出地区性的地下水流动建模的大规模的申请。为地区性的地下水流动建模的特定的方法论是被看到的,在地区性的地下水流动建模的特刊被讨论。

72 citations


Journal ArticleDOI
Liang Zhao1, Ting Ren1, Ningbo Wang2Institutions (2)
Abstract: Large scale open cut coal mining operations have significant impacts to groundwater in surrounding areas in both active and post-mining phases. The prediction of water inflows into a surface mine excavation is one of the many components involved in mine design phase. Groundwater performance also reacts to mining activities from the operational, economic and safety implications perspective. Under NSW planning legislation, as part of the comprehensive risk assessment, a groundwater impact assessment has to be conducted for a coal project to predict and mitigate the impacts in consideration of the government requirements. In this paper, the groundwater assessment modelling of mine pits was discussed in predicting of groundwater inflows and reviewing analytical and numerical approaches. A methodology of groundwater impact assessment for an open cut mine in NSW with a three-dimensional groundwater flow model Modflow Surfact demonstrated its functions in simulating the project’s impacts on the groundwater regime. The key findings with mitigations are discussed and recommended in the paper to reduce impacts on groundwater and fulfil regulation requirements in NSW.

27 citations