摘要
文章为认识神农架大九湖湿地的水环境状况,于2016年4月-2017年2月进行了监测,测定指标包括水温、溶氧、pH值、电导率、总氮、总磷、氨氮、高锰酸盐指数、叶绿素a含量等,并据此对水质和水体富营养化进行了评价。水质模糊综合评价结果表明,大九湖湿地夏季水质最好,其次为秋季和冬季,春季水质最差;5~9号湖区水质较好,其次为3、4号湖区,1、2号湖区水质最差。富营养化评价结果显示,大九湖湿地总体处于轻度富营养化状态,不同季节富营养化程度排序为春季>秋季>夏季>冬季。1~5号湖富营养化程度较高,7~9号湖富营养化程度较低,6号湖居中。总体上,大九湖湿地水环境呈现明显的时空异质性,水体营养负荷较高,对该湿地的保护工作需要考虑不同湖区的环境差异,对不同湖区采取针对性的工作;应注重湖泊水位的保持和浅水沼泽的恢复,退牧还草以恢复植被和减少营养盐输入,同时,要针对水环境的具体问题开展生态修复工作,提升水体自净能力。
In order to explore the water quality of Dajiuhu wetland in Shennongjia,water quality of the Dajiuhu wetland was monitored from April 2016 to February 2017.Temperature,dissolved oxygen,pH,conductivity,total nitrogen,total phosphorus,ammonia nitrogen,permanganate index,chlorophyll a content were monitored at the same time.The result of the fuzzy comprehensive evaluation showed that water quality in summer is the best,followed by autumn and winter,water quality in spring is the worst.Water quality of Lake 5 to 9 is the best,followed by lake 3 and 4,lake 1 and 2 are the worst.Eutrophication evaluation showed that water in Dajiuhu wetland was light eutrophic,the eutrophication level in different season were sorting for summer>spring>autumn>winter.The eutrophication level of lake 1 to 5 is highest,followed by is lake 6,and lake 7 to 9 are lowest.It was concluded significant spatio-temporal heterogeneity was the characteristics of Dajiuhu wetland.The protection strategies for water quality were including water level keeping,marsh recovery and the nutrient load control,besides these,self-purification enhancing was also very important for the ecosystem health.
作者
宋庆洋
张志麒
米武娟
黄宇波
牛海玉
毕永红
SONG QingYang;ZHANG Zhiqi;MI Wujuan;HUANG Yubo;Niu Haiyu;BI Yonghong(State Key Laboratory of Fresh Water Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan430072,China;University of Chinese Academy of Sciences,Beijing100049,China;Shennongjia National Park,Shennongjia443000,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第S1期199-205,共7页
Environmental Science & Technology
基金
国家自然科学基金项目（31123001）
关键词
大九湖湿地
水质
模糊综合评价
富营养化
营养状态指数法
Dajiuhu wetland
water quality
fuzzy comprehensive evaluation
eutrophication
nutrition state index method
