基于化学与信息的湖泊水质评价  

Assessment of Lake Water Quality Based on Chemical Exergy and Information Exergy

作　　者：尹耀锋 邹朝望 孙媛媛 YIN Yaofeng;ZOU Chaowang;SUN Yuanyuan(Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute,Wuhan 430064,China)

机构地区：[1]湖北省水利水电规划勘察设计院,武汉430064

出　　处：《三峡生态环境监测》2018年第4期31-36,共6页Ecology and Environmental Monitoring of Three Gorges

基　　金：湖北省重点科研资助项目(HBSLKY201716;HBSLKY201715)

摘　　要：以武汉市东湖和沙湖为例,对2012—2013年间23次监测数据,采用化学和信息分析方法,通过能量、贴近度和方差对两个湖泊的水质状况进行评价。结果表明:(1)化学分析方法从能量的角度建立了当前状态与国家各类水质标准间的数量联系,计算过程客观,无主观赋值,结果直观。(2)信息矩阵刻画了水质过程的变化规律。对于不同的过程,可用贴近度衡量它们与标准过程的距离,判断水质类别。当几个过程的贴近度相同时,可用方差从中选取最接近的过程,判断水质类别。(3)监测指标中污染严重的指标是总氮和总磷。总氮大多处于Ⅴ类,总磷大多处于劣Ⅴ类,其中沙湖的污染要严重于东湖。Based on the theory of chemical exergy and information exergy,the monitoring data taken from East lake and Sha lake in Wuhan during 2012-2013 was used to evaluate the water quality of the two lakes.The re-sults indicate that:(1)In the aspect of energy transfer,the chemical exergy analysis establishes quantitative connection between the current state and each level of water quality standard.The calculation is objective with?out subjective assignment and the outcome is intuitively visual.(2)The matrix of information exergy describes variations of water quality.The close degree can be used to measure the difference of different processes with re-spect to each standard process.When the close degrees of several processes are the same,the water quality level can be evaluated by the minimum variance of the processes.(3)The most serious pollution indicators for the two lakes are total nitrogen(TN)and total phosphorus(TP).The TP and TN states are at the Level IV and Level V of the water quality standard,respectively.The water quality of Sha lake is worse than that of East lake.

关 键 词：水质评价 东湖 沙湖 化学 信息[火用] 

分 类 号：X172[环境科学与工程—环境科学] S141[农业科学—肥料学]