PDF(Pubmed)
Abstract：
Groundwater serves as a primary water source for various purposes. Therefore, aquifer pollution poses a critical threat to human health and the environment. Identifying the aquifer\'s highly vulnerable areas to pollution is necessary to implement appropriate remedial measures, thus ensuring groundwater sustainability. This paper aims to enhance groundwater vulnerability assessment (GWVA) to manage aquifer quality effectively. The study focuses on the El Orjane Aquifer in the Moulouya basin, Morocco, which is facing significant degradation due to olive mill wastewater. Groundwater vulnerability maps (GVMs) were generated using the DRASTIC, Pesticide DRASTIC, SINTACS, and SI methods. To assess the effectiveness of the proposed improvements, 24 piezometers were installed to measure nitrate concentrations, a common indicator of groundwater contamination. This study aimed to enhance GWVA by incorporating new layers, such as land use, and adjusting parameter rates based on a comprehensive sensitivity analysis. The results demonstrate a significant increase in Pearson correlation values (PCV) between the produced GVMs and measured nitrate concentrations. For instance, the PCV for the DRASTIC method improved from 0.42 to 0.75 after adding the land use layer and adjusting parameter rates using the Wilcoxon method. These findings offer valuable insights for accurately assessing groundwater vulnerability in areas with similar hazards and hydrological conditions, particularly in semi-arid and arid regions. They contribute to improving groundwater and environmental management practices, ensuring the long-term sustainability of aquifers.
摘要：
地下水是各种用途的主要水源。因此,含水层污染对人类健康和环境构成严重威胁。确定含水层的高度易受污染的地区是必要的，以实施适当的补救措施，从而确保地下水的可持续性。本文旨在加强地下水脆弱性评估（GWVA），以有效地管理含水层质量。这项研究的重点是Moulouya盆地的ElOrjane含水层，摩洛哥,由于橄榄厂废水，它面临着显著的降解。地下水脆弱性图（GVM）是使用DRASTIC生成的，农药DRASTIC,SINTACS,和SI方法。为了评估拟议改进的有效性，安装了24个压力计来测量硝酸盐浓度，地下水污染的常见指标。这项研究旨在通过合并新的图层来增强GWVA，比如土地利用，并在综合敏感性分析的基础上调整参数率。结果表明,所产生的GVM和测量的硝酸盐浓度之间的Pearson相关值(PCV)显著增加。例如,在添加土地利用层并使用Wilcoxon方法调整参数速率后，DRASTIC方法的PCV从0.42提高到0.75。这些发现为准确评估具有类似危害和水文条件的地区的地下水脆弱性提供了宝贵的见解，特别是在半干旱和干旱地区。它们有助于改善地下水和环境管理实践，确保含水层的长期可持续性。
