引用本文:张雷,时瑶,张佳磊,刘志超,秦延文,迟明慧,等.大宁河水生态系统健康评价[J].环境科学研究,2017,30(7):1041-1049.
ZHANG Lei,SHI Yao,ZHANG Jialei,LIU Zhichao,QIN Yanwen,CHI Minghui,et al.Health Assessment of Aquatic Ecosystem in the Daning River, China[J].Reserrch of Environmental Science,2017,30(7):1041-1049.]
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大宁河水生态系统健康评价
张 雷1,2, 时 瑶1,2, 张佳磊3, 刘志超1,2, 秦延文1,2, 迟明慧1,2
1.中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 ;2.中国环境科学研究院, 环境保护河口与海岸带环境重点实验室, 北京 100012 ;3.湖北工业大学, 轻工学部资源与环境工程学院, 湖北 武汉 430068
摘要:
随着人口增长及社会经济的发展,河流水生态系统健康受到严重威胁. 为了解大宁河水生态系统健康状况,选取大宁河2011—2015年水体水质〔水温、pH、SD(透明度)、ρ(DO)、ρ(CODMn)、ρ(TN)、ρ(TP)〕与水生态〔藻密度、ρ(Chla)〕9个主要指标,构建了大宁河水生态系统健康评价指标体系,运用基于熵值法的综合健康指数法对其水体生态系统健康状况进行综合评价. 结果表明,2011—2015年,大宁河水生态系统健康状况整体呈亚健康状态,有50.89%的监测样本处于亚健康状态,枯水期健康状态好于丰水期. 大宁河各监测断面CHI(综合健康指数)值的季节变化特征为丰水期低于枯水期;年际变化特征为从2011—2015年CHI值呈先升后降的变化趋势,健康状态呈先转好后转差的变化趋势,大宁河水体富营养化趋势明显;空间变化特征为丰水期和枯水期CHI最低值主要位于中下游的白水河、龙门和菜子坝断面,河流水质与人类活动强度密切相关. 研究显示,影响大宁河水生态系统健康的关键因子为营养盐指标〔ρ(TN)、ρ(TP)〕和有机物指标〔ρ(CODMn)〕.
关键词:  大宁河  水生态系统  综合健康指数  健康评价
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基金项目:国家水体污染控制与治理科技重大专项(2014ZX07104-006-001)
Health Assessment of Aquatic Ecosystem in the Daning River, China
ZHANG Lei1,2, SHI Yao1,2, ZHANG Jialei3, LIU Zhichao1,2, QIN Yanwen1,2, CHI Minghui1,2
1.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;2.State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Water Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;3.School of Resources and Environmental Engineering, Hubei University of Technology, Wuhan 430068, China
Abstract:
Abstract: With socio-economic development and population growth, the aquatic ecosystem health in rivers has become severely threatened. The aim of this article is to explore the aquatic ecosystem health of the Daning River. An indicator system for aquatic ecosystem health assessment was established by selecting 7 water quality parameters (i.e., water temperature, pH, SD, DO, CODMn, TN and TP) and 2 phytoplankton parameters (i.e., algal density and Chla) of the Daning River over 2011-2015 to build a river aquatic ecosystem health assessment indicator system. The comprehensive health index was used to assess the degree of river aquatic ecosystem health of the Daning River. The results indicated that the health condition of river aquatic ecosystem in the Daning River was classified as sub-healthy state, with the proportion of monitoring samples with sub-healthy state accounting for 50.89% of the total samples. The health status in the dry season was better than that in the wet season. The seasonal variation results indicated that CHI values for different sampling sites in the wet season were lower than those in the dry season. The interannual variation of CHI values results showed a rising trend first and then decreasing during 2011 to 2015, and the health condition of the river aquatic ecosystem in the Daning River showed an improvement first and then declining trend. The water body of the Daning River showed significant eutrophication trend. The spatial variation results showed the lowest CHI values in the wet and dry seasons at the Baishuihe, Longmen and Caiziba sites. We also found that water quality in the Daning River was closely related to human activities. The indicators such as TN, TP and CODMn were the key factors that affected the aquatic ecosystem health in the Daning River.
Key words:  Daning River  aquatic ecosystem  CHI  health assessment