摘要
采用综合营养指数法对四川省主要河流营养状况进行调查评价,分析其时空分布规律。结果表明,2009年四川省水体综合营养状态整体处于中营养水平。从空间分布情况看,水体营养状态从优到劣依次为金沙江、长江干流、岷江、嘉陵江、沱江,其中沱江处于轻度富营养状态。从时间分布情况看,除沱江流域月度间变化较小外,其他调查河流水体营养状态月度间变化呈双峰型"M"状,营养指数主峰发生在8月;长江干流、岷江和嘉陵江次峰发生在4—5月,金沙江次峰发生在10月。
The eutrophication status of water in Sichuan province is investigated and assessed adopting comprehensive nutrition state index, moreover this paper analyzed the temporal and spatial distribution of water eutrophication. The results reveal that the eutrophication status of water body inSiehuan province were at mesotrophic level. In spatial distribution , the best in the spatial distribution of water trophic status is Jinsha River, orderly Yangtze River Mainstream, Minjiang River, Jialing River, and Tuojiang River is the worst and light eutropher. In temporal distribution, the monthly change of Tuojiang River is not obvious, the others＇ present bimodal shape of ＂M＂ , the highest peak takes place in August;the secondary peak of Yangtze River Mainstream, Minjiang river and Jialing River takes place between April and May,and Jinsha River occurs in October.
出处
《中国环境监测》
CAS
CSCD
北大核心
2012年第5期6-8,共3页
Environmental Monitoring in China
关键词
四川省
水体富营养
时空分布
Sichuan province
eutrophication
temporal and spatial distribution
