摘要
为了调研平原河网地区观光水体的水质状况,应用模糊综合评价法对浙江省嘉善县大云镇“十里水乡”景区河道进行水质评价。各水质评价指标对应不同等级水质标准的可能性由隶属度函数表征,所有水质评价指标的隶属度函数值组成一个模糊矩阵。各水质评价指标对水质评价结果的影响程度由权重因子衡量,将模糊矩阵R与权重矩阵A综合计算得到模糊综合评价矩阵B。水质分析与评价结果表明:COD(chemical oxygen demand,化学需氧量)和COD Mn(高锰酸盐指数)总体上稳定,NH 3-N(氨氮)和TP(total phosphorus,总磷)含量夏季升高而春秋季降低,TN(total nitrogen,总氮)含量大体上呈上升趋势,而“十里水乡”河道水质总体上呈下降趋势;在一年的监测期间,“十里水乡”河道水体Ⅰ类、Ⅱ类、Ⅲ类、Ⅳ类水质各占8.3%,Ⅴ类水质占66.8%,综合水质以Ⅴ类水质为主;TN含量对“十里水乡”河道水质总体评价的影响较大。模糊综合评价法可客观综合地评价水质;通过控制TN的排放可有效改善水环境质量。
In order to investigate the water quality of sightseeing water in plain river network region,fuzzy comprehensive evaluation method was adopted to assess the water quality of“Miles of Water Town”sightseeing river network in Dayun Town,Jiashan County,Zhejiang Province.The possibility of every water quality evaluation index corresponding to different water quality grades was characterized by membership function,whose values of all water quality evaluation indexes constituted a fuzzy relation matrix.Weight factors measured the degree of every water quality evaluation index influencing water quality assessment results,obtaining the fuzzy comprehensive evaluation matrix B synthetically calculated by fuzzy relation matrix R and weight matrix A.The results of water quality analysis and assessment show that COD(chemical oxygen demand)and COD Mn are generally stable,contents of NH 3-N and TP(total phosphorus)increase in summer while decrease in spring and autumn,TN(total nitrogen)content is generally on the rise and the water quality of“Miles of Water Town”river is on the whole in decline;during the monitoring period throughout one year,classⅠ,classⅡ,classⅢand classⅣwater quality each account for 8.3 percent in“Miles of Water Town”river network,and classⅤwater quality accounts for 66.8 percent.Therefore,the comprehensive water quality is dominated by classⅤ;moreover,TN content has greater influence on the overall evaluation of its water quality.Fuzzy comprehensive evaluation method can assess water quality objectively and comprehensively;the water environment quality can be improved effectively by controlling the emission of TN.
作者
陈勇民
CHEN Yongmin(School of Civil Engineering and Architecture,Zhejiang University ofScience and Technology,Hangzhou 310023,Zhejiang,China)
出处
《浙江科技学院学报》
CAS
2020年第6期583-589,共7页
Journal of Zhejiang University of Science and Technology
基金
浙江省公益技术研究社会发展项目(2016C33101)。
关键词
观光水体
水质评价
模糊综合评价法
隶属度
sightseeing water
water quality assessment
fuzzy comprehensive evaluation method
membership function