Institut Supérieur des Sciences et Techniques des Eaux de Gabès, Université de Gabès, Gabès, Tunisia.
LR: Applied Hydro-Sciences Laboratory Research Campus Universitaire, 6072 Zrig, Gabes, Tunisia.
Environ Sci Pollut Res Int. 2023 Feb;30(6):15422-15437. doi: 10.1007/s11356-022-23193-4. Epub 2022 Sep 28.
In southern Tunisia especially in Gabes region, irrigated agriculture is the major economic sector. The intensive exploitation of groundwater have been gradually rising, leading the water quality to deteriorate. To ensure sustainable development and preserve water, soil, and land cover resources, a careful estimation of the irrigation water quality, which influence on the regional agriculture activities. The objective of this study is to investigate the irrigation water suitability based on hydrogeological, hydrochemical, and analytic hierarchy approach (AHP) and water quality index (WQI). Results highlighted that TDS of the groundwater ranged from 0.4 to 6 g/L. The most abundant chemical species in the water were Ca, Cl, SO, and Na, with mean concentration of 460 mg/L, 1320 mg/L, 1450 mg/L, and 1200 mg/L, respectively. The largest amounts were discovered along the shoreline and in deep aquifers embedded in Cretaceous sediments. AHP has used as multicriteria decision analysis, to weighting groundwater quality criteria, and groundwater suitability for irrigation has been mapped. Based on the Quality index "WQI", the water samples are categorized into three types: excellent, acceptable, and worthless. A 45% of sampled water is not suitable for irrigation use. However, groundwater quality is increasingly poor towards the coastal areas and north of the study area. This study concluded that the method adopted in assessing the groundwater quality in arid coastal areas led to important results and could be helpful scholar to improve their research especially in similar areas. It can also assist decision makers in taking proactive solutions to protect and preserve groundwater resources from pollution risks.
在突尼斯南部，特别是加贝斯地区，灌溉农业是主要的经济部门。地下水的大量开采逐渐增加，导致水质恶化。为了确保可持续发展和保护水资源、土壤和土地覆盖资源，需要仔细评估灌溉水质，因为它会影响到地区的农业活动。本研究的目的是基于水文地质学、水化学和层次分析法（AHP）和水质指数（WQI）来调查灌溉水的适宜性。结果表明，地下水的总溶解固体（TDS）范围为 0.4 至 6 克/升。水中最丰富的化学物质是 Ca、Cl、SO 和 Na，平均浓度分别为 460 毫克/升、1320 毫克/升、1450 毫克/升和 1200 毫克/升。这些大量物质是在海岸线和嵌入白垩纪沉积物中的深部含水层中发现的。层次分析法（AHP）已被用作多准则决策分析，以对地下水质量标准进行加权，并且已经绘制了地下水适宜灌溉的地图。根据质量指数“WQI”，水样可分为三类：优秀、可接受和无用。45%的采样水不适宜灌溉使用。然而，地下水质量在沿海地区和研究区北部越来越差。本研究得出的结论是，在干旱沿海地区评估地下水质量的方法得出了重要的结果，这对学者们改进他们的研究，特别是在类似地区的研究，可能会有所帮助。它还可以帮助决策者采取积极措施，保护和保护地下水资源免受污染风险。
