摘要
为了解武夷山风景名胜区流域内水质状况及其影响因素,在2008—2009年间对武夷山国家风景名胜区流域8个采样点水质污染物指标进行了逐月监测,研究该流域地表水质的季节变化特征并进行评价。结果表明,该流域水体中的pH值在6.45～7.80,冬、春季较高,夏、秋季较低;NH_3-N、NO_3^-—N、TN、TP质量浓度从大到小依次为冬季、春季、夏季、秋季,COD_(Mn)从大到小依次为夏季、冬季、春季、秋季;相对而言,水质随季节的变化以秋季较好,冬季较差。流域内水文特征、生态环境和人类、农业活动对溪流水质有一定的影响,尤其水体中TP、TN质量浓度较高,说明农业面源污染的影响明显。
This study is aimed to understand the water quality of wa tershed in Wuyishan National Key Scenic Area and corresponding fac- tors which affect the water quality. Hence, concentrations of various pollutants were monitored monthly in eight spots of the area from 2008 to 2009. The results showed that the pH of water ranged from 6.45 to 7.80 and the readings in winter and spring were higher if compared to summer and autumn. The concentrations of NH3 - N, NO3- - N, TN and TP were also showing similar trends as of pH readings. In reverse, the concentrations of CODMn in summer and winter were higher than autumn and spring. The content of NH3 - N could achieve the qualification of Class I as per Environmental Quality Standard for Sur- face Water （GB 3838--2002） in summer and autumn, but it could only meet Class Ⅱ in spring and winter. Except winter time, the content of CODMn could achieve Class 1 qualification in spring, sum- mer an autumn. The content of TP could fulfill the qualification of Class Ⅱ as per the standard throughout the year. However, the con- tent of TN only met the criteria of Class Ⅱ or Class Ⅲ as described by the quality standard. The correlation analysis showed that there were relationships among NH3 - N, NOn- - N, TN, TP and CODMn, and the correlation between NH3 - N and TN was significant. The water quality of Wuyishan National Key Scenic Area watershed was su- perior in upstream and worst in midstream. The results indicated that the water quality variation of surface water in these watersheds were mainly contributed by geological and hydrological characters, human activities and various agricultural practices. It is noteworthy that the concentration of TP and TN were recorded to be significant in this study, showing that the water quality was greatly impacted by agricul- tural pollution.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2010年第5期112-116,共5页
Journal of Safety and Environment
基金
福建省科技计划重点项目(2008Y0026)
福建科技计划省属公益类科研院所基本科研专项(2009R10034-3)
关键词
环境学
流域
季节变化
水质
武夷山
environmentalology
watershed
seasonal variation
water quality
Wuyishan
