摘要
分析2014年四个季节罗时江河口湿地常规水质指标p H、DO、TP、MPO4、TN、NH+4-N、NO3-N、NO2-N、COD和Chl-a浓度的季节性变化特征及相互关系,并用内梅罗指数法和综合营养状态指数法评价罗时江河口湿地水质和营养状况。结果表明:1)该湿地水质随季节变化呈现出不同的变化规律。2)内梅罗指数评价结果为春季水质最差,达到重污染级别,秋季和冬季次之,水质级别为较好,夏季水质属于良好水平;富营养化指数四个季节大小顺序为春季(65.53)>秋季(59.46)>冬季(57.90)>夏季(50.70),即春季富营养化水平最高,达到中度富营养,夏秋季水质次之,为轻度富营养,冬季水质较好,但也达到了富营养化水平。3)不同季节CN/CP比值变化较大,由大到小的顺序依次为春季(60)、冬季(59)、秋季(26)、夏季(8)。4)罗时江河口湿地营养盐主要来自陆源,并以氮营养盐为主要污染因子。
The paper analyzed the seasonal variation characteristics of concentration and the relationship of conventional water quality index of p H,DO,TP,MPO4,TN,NH+4- N,NO3- N,NO2- N,COD and Chl-a in Luoshijiang estuary wetlands in four seasons of 2014,used the Nemero index method and the comprehensive trophic state index method to evaluate the water quality and nutritional status of Luo Shijiang estuary wetlands. Results showed that: 1) The water quality of the wetland varied with the seasons. 2) The evaluate results of the Nemero index showed the water quality of spring was the worst,it had seriously been contaminated,autumn and winter followed,it came to the better level,summer water quality was a good level; The eutrophication index of four seasons were spring( 65. 53) > autumn( 59. 46) > winter( 57. 90) > summer( 50. 70),the eutrophication level of the spring was the highest,it came to the middle level,summer and autumn followed,it came to the mild level,the water quality of Winter was better,but it also came to the eutrophication level. 3) The ratio of CN/ CPvaried greatly in different seasons,in the descending order,spring( 60),winter( 59),autumn( 26),summer( 8). 4) The nutrient salt of Luo Shijiang estuary wetland mainly came from terrigenous,the main pollution factor was nitrogen nutritional salts.
出处
《环境工程》
CAS
CSCD
北大核心
2016年第S1期845-849,877,共6页
Environmental Engineering
基金
国家自然科学基金项目(51469030
31560237)
云南省高校优势特色重点学科(生态学)建设项目资助
关键词
罗时江河口湿地
水质季节变化特征
水质评价
内梅罗指数法
综合营养状态指数法
estuarine wetland of Luoshijiang river
water quality characteristics of seasonal variation
water quality evaluation
Nemero index
comprehensive nutrition state index
