摘要
根据94件水化学样品的分析结果,对查布水源地地下水水化学特征及其空间分布规律进行了研究,并结合含水层沉积环境及补径条件探讨了地下水化学成分的影响因素,以期为水源地水质保护提供依据。结果表明:地下水水化学类型呈现明显的水平分带性,东部地下水中阴离子以HCO3-为主,地下水水质一般较好,矿化度多小于1 g/L;西部地下水中阴离子以SO42-、Cl-为主,水质变差,矿化度明显增高;研究区硝酸盐污染比较明显,F-局部超标,矿化度超标也比较明显;水质受含水层的沉积环境和地下水补径条件及人畜活动的影响明显。水源地开采后,其影响会加大,因此应制定合理的水源地保护方案。
In order to provide evidence for the protection of water quality in the source area, the characteristics of chemical components for 96 groundwater samples in Chabu well field and their spatial distributions were analyzed, and the affecting factors of chemical components of groundwater were discussed from analyzing the depositional environment and runoff and discharge conditions of groundwater. The results indicate that in the eastern area, the main anion in groundwater is HCO3^-, the water quality is good, and its mineralization degree is less than 1 g/L; in the western area, the main anions in groundwater are SO4^2- and Cl^-, the water quality has been worsened, and its mineralization degree is increased obviously. In addition, nitrate contamination of groundwater is obvious in Chabu well field. And the water quality has been partially worsened due to high F^- concentration and mineralization degree. The factors affecting the quality of groundwater include the depositional environment and runoff and discharge conditions of ground water and human being activities. These factors must be considered in formulating protection plans for water resources in Chabu well field.
出处
《地球科学与环境学报》
CAS
2008年第4期402-407,共6页
Journal of Earth Sciences and Environment
基金
中国地质调查局项目(1212010331302)
关键词
水源地
水化学类型
硝酸盐污染
影响因素
well field
type of chemical component
nitrate pollution
affecting factor
