Can small buried-valley aquifers be an emergency water source on the Canadian Prairies?

IF 2.4 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY Hydrogeology Journal Pub Date : 2024-07-05 DOI:10.1007/s10040-024-02806-x
Marcus H. Kehler, Benjamin J. Rostron, Brian D. Smerdon, Daniel S. Alessi
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Abstract

Water security for regions that depend on mountain runoff is threatened by climate change and upstream impacts. To build resilience against water scarcity, groundwater may be an emergency or alternative water source, providing a temporary solution in the event of upstream contamination or during drought. Across western North America, buried-valley aquifers are a viable emergency water source. In Alberta, Canada, buried-valley aquifers supply domestic users; however, little is known about their capacity to supply larger water volumes. Using a regional groundwater model, this study investigated the capacity for buried-valley aquifers to supply water to the City of Edmonton, Alberta (population of 1 million) in an emergency scenario where the principal river water source was unusable. The numerical groundwater model has complex hydrostratigraphy, including glacial deposits, dipping bedrock units, and recently mapped Onoway, Beverly, and Stony buried-valley aquifers. Pumping rates varying from 10 to 375 ML/day were assessed for durations of 3, 30, and 365 days, corresponding to hypothetical response times for a range of emergencies. Although none of the aquifers could supply a sufficient volume of water for no change in service, it is possible that up to 190 ML/day could be sourced from groundwater for a period of 1 year. To achieve high rates of pumping, up to 13 production wells would be required in a buried-valley aquifer. The unique hydrogeological responses to hypothetical pumping scenarios also demonstrate the hydrogeology of buried-valley aquifers from a more holistic viewpoint as part of a regional groundwater flow system.

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小型地下河谷含水层能否成为加拿大草原的应急水源?
依赖山区径流的地区的水安全受到气候变化和上游影响的威胁。为了增强应对缺水的能力,地下水可以作为应急水源或替代水源,在上游污染或干旱时提供临时解决方案。在整个北美西部,埋藏在山谷中的含水层是一种可行的应急水源。在加拿大阿尔伯塔省,地下河谷含水层为家庭用户供水;然而,人们对其供应更大量水的能力知之甚少。本研究利用一个区域地下水模型,调查了在主要河水水源无法使用的紧急情况下,地下河谷含水层向阿尔伯塔省埃德蒙顿市(人口 100 万)供水的能力。地下水数值模型具有复杂的水文地层,包括冰川沉积、倾斜的基岩单元以及最近绘制的奥诺韦、贝弗利和斯托尼地下河谷含水层。在 3 天、30 天和 365 天的持续时间内,对 10 至 375 兆升/天的抽水率进行了评估,这与一系列紧急情况的假设响应时间相对应。虽然没有一个含水层可以在不改变服务的情况下提供足够的水量,但在 1 年的时间内,每天可以从地下水中获得高达 190 毫升的水。为了达到较高的抽水率,需要在埋藏于山谷中的含水层中打多达 13 口生产井。对假设抽水情况的独特水文地质反应,也从更全面的角度展示了作为区域地下水流系统一部分的地下河谷含水层的水文地质情况。
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来源期刊
Hydrogeology Journal
Hydrogeology Journal 地学-地球科学综合
CiteScore
5.40
自引率
7.10%
发文量
128
审稿时长
6 months
期刊介绍: Hydrogeology Journal was founded in 1992 to foster understanding of hydrogeology; to describe worldwide progress in hydrogeology; and to provide an accessible forum for scientists, researchers, engineers, and practitioners in developing and industrialized countries. Since then, the journal has earned a large worldwide readership. Its peer-reviewed research articles integrate subsurface hydrology and geology with supporting disciplines: geochemistry, geophysics, geomorphology, geobiology, surface-water hydrology, tectonics, numerical modeling, economics, and sociology.
期刊最新文献
Numerical modeling of development of Leandras and Double Bopper Caves, Grand Canyon, USA Comparison of methods to calculate groundwater recharge for karst aquifers under a Mediterranean climate Estimation of groundwater flux with active distributed temperature sensing and the finite volume point dilution method: a field comparison Can small buried-valley aquifers be an emergency water source on the Canadian Prairies? The aquifer system of the Salado-Juramento fluvial megafan distal plain, Argentina: an integrated approach of geological, hydrogeological and numerical models
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