Assessment of the vulnerability of groundwater quality with respect to aluminum on crystalline bedrock under temperate climate conditions

IF 4.9 Q2 ENGINEERING, ENVIRONMENTAL Groundwater for Sustainable Development Pub Date : 2024-07-02 DOI:10.1016/j.gsd.2024.101256
Juliette Rougerie , Rémy Buzier , Valentin Robin , François Bordas , Anne Da Silva , Julie Leblanc , Delphine Devillers , Patrice Fondanèche , Karine Cleriès , Emmanuelle Ducloux , Marc Rateau , Lauriane Boulp , Gilles Guibaud
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Abstract

Despite meeting legal standards, drinking water quality in sparsely populated areas with scattered groundwater resources in medium mountain ranges may be compromised. This results from inaccurate assessments of human activities, such as forest exploitation, on groundwater intake watersheds or insufficient monitoring frequency to understand their full impact on groundwater quality. This study involved a 3-year monthly monitoring of 18 groundwater intakes for drinking water supply, situated in areas with crystalline bedrocks, a temperate climate, and surrounded by forest exploitation. The quality of groundwater collected from alterites up to 15 m deep was evaluated over time. The correlation between the groundwater physico-chemical parameters (measured through 382 samples between March 2017 and December 2020) and the groundwater intakes’ environment - such as the geological and pedological context, land use, climate, and depth of drains - was investigated to understand their potential impact on groundwater quality. This study revealed a significant degradation in shallow groundwater quality (up to 5 m deep) concerning dissolved aluminum (concentration up to 2 mg L−1), which results from land use and is climate dependent. Indeed, dissolved aluminum concentrations in groundwater can be correlated with the pH of the upper soil horizons, which are mostly impacted by forestry practices, as well as with rainfall events. The results of this study highlight that by integrating efforts to preserve the soil and change forestry practices (e.g., selective logging, avoiding rapid rotations), more efficient protection of groundwater quality can be achieved in the context of acidic soils present on crystalline bedrock.

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评估温带气候条件下结晶基岩上铝对地下水水质的脆弱性
尽管符合法定标准,但在人口稀少、地下水资源分散的中山脉地区,饮用水水质可能会受到影响。这是因为人类活动(如森林开采)对地下水取水流域的影响评估不准确,或者监测频率不足,无法全面了解人类活动对地下水水质的影响。这项研究对 18 个饮用水取水口进行了为期 3 年的月度监测,这些取水口位于结晶基岩地区,气候温和,周围有森林开发。对从最深 15 米的地下采集的地下水水质进行了长期评估。研究了地下水物理化学参数(通过 2017 年 3 月至 2020 年 12 月期间的 382 个样本测量)与地下水取水口环境(如地质和土壤环境、土地利用、气候和排水沟深度)之间的相关性,以了解它们对地下水质量的潜在影响。这项研究显示,浅层地下水(最深 5 米)的溶解铝(浓度最高达 2 毫克/升)质量明显下降,这是土地利用和气候造成的。事实上,地下水中的溶解铝浓度与上层土壤的 pH 值(主要受林业活动的影响)以及降雨事件相关。这项研究的结果突出表明,在结晶基岩上存在酸性土壤的情况下,通过将保护土壤和改变林业实践(如选择性采伐、避免快速轮伐)结合起来,可以更有效地保护地下水水质。
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来源期刊
Groundwater for Sustainable Development
Groundwater for Sustainable Development Social Sciences-Geography, Planning and Development
CiteScore
11.50
自引率
10.20%
发文量
152
期刊介绍: Groundwater for Sustainable Development is directed to different stakeholders and professionals, including government and non-governmental organizations, international funding agencies, universities, public water institutions, public health and other public/private sector professionals, and other relevant institutions. It is aimed at professionals, academics and students in the fields of disciplines such as: groundwater and its connection to surface hydrology and environment, soil sciences, engineering, ecology, microbiology, atmospheric sciences, analytical chemistry, hydro-engineering, water technology, environmental ethics, economics, public health, policy, as well as social sciences, legal disciplines, or any other area connected with water issues. The objectives of this journal are to facilitate: • The improvement of effective and sustainable management of water resources across the globe. • The improvement of human access to groundwater resources in adequate quantity and good quality. • The meeting of the increasing demand for drinking and irrigation water needed for food security to contribute to a social and economically sound human development. • The creation of a global inter- and multidisciplinary platform and forum to improve our understanding of groundwater resources and to advocate their effective and sustainable management and protection against contamination. • Interdisciplinary information exchange and to stimulate scientific research in the fields of groundwater related sciences and social and health sciences required to achieve the United Nations Millennium Development Goals for sustainable development.
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