基于熵权-集对分析的多级生态塘功效综合评价

借助熵权-集对分析法,以龙泓涧流域主流多级生态塘中具有代表性的8个断面为研究对象,针对其水质特点,选取溶解氧(DO)、COD、TN、NH3-N和TP等5项指标,对多级生态塘系统的净化功效进行了综合评价,并对多级生态塘系统内不同形态氮的去除效率进行了分析。结果表明,氮污染物是引起本流域内水质较差的主要污染物,通过多级生态塘系统的净化,本流域内水质由Ⅴ类提升至Ⅲ类,并对氮污染负荷的削减具有比较明显的功效。最后,对本系统的进一步优化提出建议,为龙泓涧流域的水资源管理提供了理论指导。

Integrated performance assessment of multi-stage eco-ponds based on entropy weight-set pair analysis

Using entropy weight-set pair analysis, the purification efficiency of the multi-stage eco-ponds was comprehensively assessed in the Longhongjian watershed. Eight representative sites were selected for monitoring based on the watershed. According to the characteristics of water quality in this area, dissolved oxygen (DO), chemical oxygen demand (COD), total nitrogen (TN), total phosphorous (TP), and ammonia nitrogen (NH3-N) were selected as monitoring indices. The removal rates of different forms of nitrogen were analyzed. The results indicated that nitrogen pollutants were the main pollutants in the multi-stage eco-pond system. Water quality in this area was improved from class five to class three by entropy weight-set pair analysis, which showed a dramatic performance by the multi-stage eco-ponds for polluted water body purification. In addition, nitrogen pollutant loadings were significantly reduced. Recommendations are proposed for improving this system, and a theory basis is provided for water source management of the Longhongjian watershed.