Groundwater quality assessment for domestic and agricultural purposes in Yan'an City, northwest China: implications to sustainable groundwater quality management on the Loess Plateau
Groundwater quality assessment for domestic and agricultural purposes in Yan'an City, northwest China: implications to sustainable groundwater quality management on the Loess Plateau
复制标题
中国西北延安市生活和农业地下水质量评估：对黄土高原可持续地下水质量管理的影响
DOI：
10.1007/s12665-018-7968-3
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发表时间：
2018-12-01
影响因子：
2.8
通讯作者：
Xiang, Gang
中科院分区：
文献类型：
--
作者：
Li, Peiyue;He, Song;Xiang, Gang
地下水对黄土高原的可持续发展至关重要，但由于自然因素和人为污染，该地区地下水质量普遍较差。本研究以延安市为研究对象，探讨了延安市生活和农业用水的适宜性，并评价了其对黄土高原地下水可持续管理的意义。将指数水平与国家和世界卫生组织饮用水指南确定的阈值进行比较，并使用多种农业水质指标评估地下水用于灌溉的适宜性。采用熵加权的理想解相似性排序优选方法（熵加权TOPSIS）对地下水水质进行综合评价。结果表明：研究区地下水以盐渍、硬质、微碱性为主，以HCO3-Ca中心点Mg型为主，并伴有少量SO4中心点Cl-Ca中心点Mg型。碳酸盐、石膏的溶解和可溶性盐的浸出是影响地下水离子化学的重要自然过程。TH、TDS和SO4（2-）是主要指标，Fe、Mn、F-和NH4（+）是次要污染物。地下水水质总体可用于灌溉，大部分水质适宜饮用。雨水收集、水质改善、定期水质监测和多学科水研究是黄土高原地下水可持续管理的措施。
Groundwater is critical for the sustainable development of the Loess Plateau, while groundwater quality is generally poor in this area due to natural factors and anthropogenic pollution. This study was carried out to investigate the suitability of groundwater for domestic and agricultural purposes in Yan'an City on the Chinese Loess Plateau and to assess its implications to sustainable groundwater management on the plateau. The index levels were compared with the threshold values established by the national and the WHO drinking water guidelines, and the suitability of groundwater for irrigation purposes was assessed using multiple agricultural water quality indicators. An entropy-weighted Technique for Order Preference by Similarity to an Ideal Solution (entropy-weighted TOPSIS) was adopted for overall groundwater quality assessment. The results indicate that the study area is characterized by saline, hard, and slightly alkaline groundwater, mainly of the HCO3-Ca center dot Mg type, accompanied by some minor SO4 center dot Cl-Ca center dot Mg type. The dissolution of carbonates and gypsum and the leaching of soluble salts are important natural processes influencing the groundwater ion chemistry. The parameters TH, TDS, and SO4 (2-) are major indices, while Fe, Mn, F-, and NH4 (+) are minor contaminants affecting groundwater quality. The overall groundwater quality is generally acceptable for irrigation, and most of the water is suitable for drinking. Rainwater harvesting, water quality improvement programs, regular water quality monitoring, and multidisciplinary water research programs are suggested as measures for sustainable groundwater management on the Loess Plateau.