摘要
采用综合指数法对近年来昆承湖水质变化趋势进行了分析,用模糊数学综合评价法对该湖2005年水质进行评价,用等级聚类法进一步分析了其水质的空间差异,用TSIM方法分析了昆承湖富营养化状况。结果表明:1998—2004年间,昆承湖污染总体上呈加重趋势,2003年污染最严重,在各污染因子中,氮污染负荷最大;昆承湖为Ⅴ类水或劣Ⅴ类水体;由于陆源污染差异和围网养殖的影响,湖区污染程度北湖>湖西区>南湖区;昆承湖TSIM>70,呈现较严重富营养化。并分析了昆承湖所承受的巨大环境压力。
Kuncheng Lake is one of the key freshwater lakes of Changshu City in Jiangsu Province.Temporal-spatial variability of water quality of the lake is analyzed by comprehensive index method, fuzzy mathematics and hierarchical clustering method, while eutrophication of the lake is assessed by TSIM indexes.The results show that quality of the lake water has degraded gradually in recent years,and has attained to or been worse than grade-Ⅴ; among all indexes,the total nitrogen pollution is most prominent;due to difference of terrestrial sources pollution and effects of encircling gear cultivation,pollution in northern and western parts are more serious than in southern part in this lake;and Kuncheng Lake has been subject to eutrophication.Nonpoint source, point source,domestic sewage pollution etc.of the lake are evaluated in this paper.
出处
《自然资源学报》
CSCD
北大核心
2007年第2期185-192,共8页
Journal of Natural Resources
基金
教育部科技创新工程重大项目培育基金(705824)
江苏省重点科技专项(BM2002701)
安徽师范大学青年科研基金(2004xqn15)
关键词
水环境
时空变异
综合指数
等级聚类
昆承湖
water environment
temporal-spatial variability
comprehensive index
hierarchical clustering
Kuncheng Lake
