南京夹江饮用水源地安全评价

Security Evaluation for Jiajiang Drinking Water Source in Nanjing

提出饮用水源地的陆域安全评价是其安全评价的重要组成部分,将南京市夹江水源地安全评价过程分为水质评价和陆域安全评价两部分,选用化学需氧量、氨氮、硝酸盐(以N计)作为水质评价指标,试验测取17个采样点水样各指标浓度,分析得到其水质处于基本安全级别;从影响陆域安全的自然生态和人类活动等因素出发,基于遥感和GIS技术,拟定评价指标体系,构建评价模型,研究表明其陆域绝大部分处于安全级别。因此,夹江饮用水源地处于基本安全等级。

Water quality assessment and land area safety assessment make up the process of security evaluation for Jiajiang drinking water source in Nanjing. In the first step, 17 water samples are collected, and the concentration of chemical oxygen demand, ammonia nitrogen, and nitrates （with N notation） chosen as water quality indicators are determined in the laboratory. The result of the experiment shows that the water is limitedly safe. In the second step, the evaluating indicators set and the evaluating model are decided after the analysis of the main fac- tors affecting the safety of the land area from natural ecology and human activity. The result reveals that the majority of the land area is totally safe. So the security level of Jiajiang drinking water source is limitedly safe.