成都市红层地下水水质特征研究

Study on groundwater quality characteristics of red beds in Chengdu

成都市2009-2014年期间在所辖11个市县红层丘陵区布设专门红层水井,以期查明红层地下水水质状况。通过对184口红层水井进行回访调查,在成都市红层区内不同地貌、不同水文地质单元、不同地下水类型区、不同化学分区及可能受污染区域取样64组进行研究分析,结果表明,成都市红层地下水水化学类型以重碳酸型水为主,其次包括重碳酸硫酸型水、重碳酸氯化物型水以及硫酸型水、硫酸重碳酸型水。按照《农村实施<生活饮用水卫生标准>准则》(GB 5749-85)评价,红层区农村给水水质在很大程度上达到水质二级标准以上,占总数的81.2%,三级和超三级分别占总数的7.8%和11.0%。在三级水质中,主要超标指标为总硬度,而在超三级的水质中,超标元素主要为硫酸盐、总硬度、溶解性总固体,其次为铁、锰。

During the past 2009-2014 years,special red beds have been laid in the red beds hills of 11 counties and cities under the jurisdiction of the Chengdu municipality,in order to find out the groundwater quality of the red beds. Based on the 184 layer of lipstick wells visit investigation in Chengdu City,the red zone of different landforms in different geological units,different area,different types of groundwater chemical zoning and potentially contaminated area sampling of the 64 groups were analyzed. The results show that the hydrochemical type of groundwater in Chengdu red bed is mainly composed of bicarbonate type water,followed by heavy carbonate sulfuric acid water,heavy carbonate chloride type water,sulfuric acid type water and sulfuric acid heavy carbonate type water. In accordance with the ＂ implementation of rural drinking water health standards＂ standards ＂（ GB 5749-85）,red zone rural water quality to achieve water quality standards of the two to a great extent,accounting for 81. 2 % of the total,three and three respectively accounted for 7. 8 % and 11 %. In the three grade water quality,the main exceeding standard is total hardness,while in the super grade three water quality,the excessive elements are sulfate,total hardness and total dissolved solids,followed by iron and manganese.