...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological indicators >Relating wellfield drawdown and water quality to aquifer sustainability - A method for assessing safe groundwater abstraction
【24h】

Relating wellfield drawdown and water quality to aquifer sustainability - A method for assessing safe groundwater abstraction

机译：将井场水位下降和水质与含水层可持续性联系起来-一种评估安全开采地下水的方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Planning for sustainable groundwater abstraction requires realistic and reliable assessments of groundwater drawdown in aquifers as well as impacted groundwater-dependent terrestrial and aquatic ecosystems. Present-day impact assessments allocate water for the environment and ecosystems in the form of environmental groundwater requirements (EGWRs). However, securing sustainable groundwater abstraction also requires stable groundwater quality for consumers and receptors (e.g. streams and groundwater-dependent ecosystems). We suggest dividing EGWR into two parts, namely EGWR(flow) related to impacts on surface water, and EGWR(wq), related to impacts on groundwater quality. We then propose a method for modelling maximum safe groundwater abstraction rates based on a relationship between water quality and piezometric heads. The method provides estimations of sustainable abstraction rates that secure stable water quality and maintain water security. Using hydrological modelling, we estimated spatially differentiated EGWR(wq), for Zealand, Denmark, based on three different conditioned drawdowns of 3, 6 and 9 m. We found that depending on the boundaries and the different conditioned drawdowns EGWR(wq), poses a 2.5-83% share of the groundwater recharge. We found that a redistribution of water abstraction would make 27 million m(3) available compared with actual abstraction, dependent on scale, while keeping within a conditioned drawdown of 3 m. Our results demonstrate how conditioned drawdown can be implemented with the objectives of evaluating actual abstraction and securing stable water quality, hence comprising a step towards more reliable and relevant groundwater impact assessments.
机译：规划可持续的地下水抽取需要对含水层以及受地下水影响的陆地和水生生态系统的地下水抽取进行现实，可靠的评估。当前的影响评估以环境地下水需求量（EGWR）的形式为环境和生态系统分配水。但是，要确保可持续的地下水提取，还需要消费者和接受者（例如河流和依赖地下水的生态系统）保持稳定的地下水质量。我们建议将EGWR分为两部分，即与对地表水的影响有关的EGWR（流量）和与对地下水水质的影响有关的EGWR（wq）。然后，我们提出一种基于水质和测压压头之间关系的最大安全地下水抽取率模型。该方法提供了可确保稳定水质和维持水安全的可持续提取率的估计。使用水文模型，我们基于3、6和9 m的三种不同条件降落，估算了西兰，丹麦的空间区分EGWR（wq）。我们发现，取决于边界和不同的条件降落量EGWR（wq），占地下水补给量的2.5-83％。我们发现，与实际取水相比，取水的重新分配将使2700万立方米（3）可用，具体取决于规模，同时使取水量保持在3 m以内。我们的结果表明，有条件地减少水量可以如何实现，以评估实际取水量和确保稳定的水质为目标，从而迈出了进行更可靠和相关的地下水影响评估的一步。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号