西安护城河水环境污染状况分析与综合评价  

Analysis and comprehensive evaluation on pollution situation of water environment in Xi'an moat

作　　者：陶望雄 李文宾[1] 孙菲[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054

出　　处：《水资源与水工程学报》2015年第3期72-75,79,共5页Journal of Water Resources and Water Engineering

基　　金：高等学校学科创新引智计划项目(B08039);干旱半干旱地区多种农业水资源合理配置及有效利用战略研究(2014-07-XZ-002)

摘　　要：为研究西安市护城河水环境污染特征,对护城河10个采样点水体的溶解氧(DO)、化学需氧量(CODCr)、总氮(TN)、氨氮(NH3—N)及总磷(TP)等指标进行测定分析,并对其污染成因进行了探讨。结果表明:西安护城河南-西段从A1~A5,DO、CODCr、TN、NH3—N、TP均是随着流向逐渐增大的趋势,水体主要受内源污染;而东-北段沿B1~B5,各监测指标无明显变化规律,但CODCr、TN、NH3—N、TP多在B3达到峰值,水体除了受到内源污染外,主要受外源污染影响。采用城市河流水环境综合评价方法,构建西安护城河水环境综合评价指标体系和评价模型。护城河总体水环境质量水平较差,其中南段相对较好,西段、东段次之,北段最差,亟待治理和保护。In order to analyze the pollution characteristics of water environment in Xi'an moat , the paper measured the indexes including DO , CODCr , TN, NH3-N and TP from 10 sampling points and analyzed its pollution causes.The results show that DO, CODCr, TN, NH3-N and TP presents a gradual increase trend with the flow along south-west section of Xi'an moat from sampling points A 1 to A5 , which indicates that the south-west section may be mainly affected by endogenous pollutants;While these parameters have no obvious variation trend along the east-north section from sampling points B1 to B5,but in the sampling point B3, the indicators such as COD Cr、TN、NH3-N and TP reached the maximum value in 10 sampling points, which shows that the east-north section may be polluted not only endogenous pollutants , but main-ly polluted by exogenous pollutants .The paper applied integrated evaluation method of urban river envi-ronment to establish the comprehensive evaluation index system and evaluation model of Xi 'an moat.The results show that overall water environmental quality level is poor ,that of the southern section is relatively good, that of the western part and the eastern section is the second , and that of the northern section is the worst.

关 键 词：污染成因 外源污染 城市河流水环境综合评价 护城河 

分 类 号：X522[环境科学与工程—环境工程] X824