In this paper,15 rivers and 10 lake reservoirs in the Liaohe River basin were taken as research objects. Based on six indexes: satisfaction situation of ecological water demand,standard-reaching rate of water quality ...In this paper,15 rivers and 10 lake reservoirs in the Liaohe River basin were taken as research objects. Based on six indexes: satisfaction situation of ecological water demand,standard-reaching rate of water quality in water function area,eutrophication index of lakes and reservoirs,longitudinal connectivity of rivers,reserve rate of important wetlands and status of important aquatic habitat,water ecological conditions of main rivers and lakes in the basin were evaluated. The results showed that the rivers with better ecology were mainly distributed in east mountainous area of Liaoning,such as the upper reaches of the Hunhe River and the Taizi River;the problems of water pollution,ecological water shortage and habitat shrinkage were widespread in the Liaohe River basin,and the situation of water ecological security in the Liaohe River basin still faced great pressure.展开更多
The Dajiu Lake is an important subtropical alpine wetland in central China.In May of 2019,an ecological investigation was conducted on water quality and aquatic organisms(phytoplankton,zooplankton and zoobenthos)of th...The Dajiu Lake is an important subtropical alpine wetland in central China.In May of 2019,an ecological investigation was conducted on water quality and aquatic organisms(phytoplankton,zooplankton and zoobenthos)of the Dajiu Lake in Shennongjia forest region.The results showed that parameters of water quality in No.5 and No.9 sub lakes of the Dajiu Lake corresponded with standard of class II water of the Environmental Quality Standards for Surface Water(GB 3838-2002),while other sub lakes corresponded with standard of class III water.Diversity indexes of phytoplankton and zooplankton ranged from 2.0 to 3.0,and there were two families(Chironomidae and Libellulidae Rambur)of one phylum(Arthropoda)in zoobenthos.Comprehensive health index of entropy weight was used to evaluate water ecological status of the Dajiu Lake,and water quality of No.5,No.8 and No.9 sub lakes was in a healthy status,while other sub lakes were in sub-health status.Finally,corresponding countermeasures were proposed according to protection needs of the Dajiu Lake.展开更多
The assessment of the ecosystem health of urban rivers and lakes is the scientific basis for their management and ecological restoration.This study developed a three-level indicator system for its assessment.The resul...The assessment of the ecosystem health of urban rivers and lakes is the scientific basis for their management and ecological restoration.This study developed a three-level indicator system for its assessment.The results indicated that:Zhonghai and Nanhai are in the state of transition from unhealthy to critical state and all the other lakes are in unhealthy states.Water environmental quality,structure and function of the aquatic ecosystem,and the structure of waterfront areas were the constraints.Nanhai was ranked as poor and the others were all ranked as very poor.However,the ecological environment of Zhonghai and Nanhai were better than the others,the sums of the degree of membership to the healthy state and critical state were all close to 0.6.and the restorations of these lakes were moderate.The sums of the degree of membership to the healthy state and critical state of the other lakes were under 0.3,as it was difficult to restore these lakes.Some suggestions on scientific management and ecological restoration of the six lakes were proposed:①To control non-point pollution and to improve the water quality of six lakes and the water entering into these lakes;②To improve the hydrological conditions of six lakes;③To rehabilitate the aquatic ecosystem and waterfront areas.展开更多
作为水生态保护与修复的重要理论,鱼类栖息地健康评价一直是研究重点,但缺少量化综合评价的深入研究。以长江上游中的5处典型深潭生境为例,构建了鱼类栖息地健康状况量化评价体系。研究通过长江上游典型深潭生境健康评价(一级指标)为基...作为水生态保护与修复的重要理论,鱼类栖息地健康评价一直是研究重点,但缺少量化综合评价的深入研究。以长江上游中的5处典型深潭生境为例,构建了鱼类栖息地健康状况量化评价体系。研究通过长江上游典型深潭生境健康评价(一级指标)为基准,分为了栖息地环境和栖息地功能(二级指标),涵盖了水质特性、生物环境、水文环境、鱼类资源状况、栖息地质量5个三级指标以及29个四级指标,基于熵权法构建栖息地健康综合评价数学模型,通过栖息地健康综合指数(Comprehensive Health Indicator,ρ)表征典型栖息地健康状态,并对其健康状况进行综合评价。研究结果表明:长江上游典型深潭生境有1处健康等级评价为Ⅰ级,处于非常健康状态;3处评价为Ⅱ级,处于健康状态;1处评价为Ⅲ级,处于亚健康状态,无不健康或劣汰的点。总体来看,长江上游典型栖息地基本处于健康状态,且表现出较强的空间异质性,该评价结果在一定程度上客观反映了长江上游典型栖息地的健康状况,最后根据评分等级探讨了长江上游鱼类栖息地生态系统中亟需解决的问题,针对性地提出了生境修复的对策与建议。展开更多
基金Supported by the National Water Resources Protection Plan of the Ministry of Water Resources。
文摘In this paper,15 rivers and 10 lake reservoirs in the Liaohe River basin were taken as research objects. Based on six indexes: satisfaction situation of ecological water demand,standard-reaching rate of water quality in water function area,eutrophication index of lakes and reservoirs,longitudinal connectivity of rivers,reserve rate of important wetlands and status of important aquatic habitat,water ecological conditions of main rivers and lakes in the basin were evaluated. The results showed that the rivers with better ecology were mainly distributed in east mountainous area of Liaoning,such as the upper reaches of the Hunhe River and the Taizi River;the problems of water pollution,ecological water shortage and habitat shrinkage were widespread in the Liaohe River basin,and the situation of water ecological security in the Liaohe River basin still faced great pressure.
基金Supported by Key Scientific Research Project of Hubei Department of Water Resources in 2017(HBSLKY201719).
文摘The Dajiu Lake is an important subtropical alpine wetland in central China.In May of 2019,an ecological investigation was conducted on water quality and aquatic organisms(phytoplankton,zooplankton and zoobenthos)of the Dajiu Lake in Shennongjia forest region.The results showed that parameters of water quality in No.5 and No.9 sub lakes of the Dajiu Lake corresponded with standard of class II water of the Environmental Quality Standards for Surface Water(GB 3838-2002),while other sub lakes corresponded with standard of class III water.Diversity indexes of phytoplankton and zooplankton ranged from 2.0 to 3.0,and there were two families(Chironomidae and Libellulidae Rambur)of one phylum(Arthropoda)in zoobenthos.Comprehensive health index of entropy weight was used to evaluate water ecological status of the Dajiu Lake,and water quality of No.5,No.8 and No.9 sub lakes was in a healthy status,while other sub lakes were in sub-health status.Finally,corresponding countermeasures were proposed according to protection needs of the Dajiu Lake.
基金This study was supported by the National Basic Research Program of China(Grant No.2006CB403403)Key Program of the National Natural Science Foundation of China(Grant No.50238020)。
文摘The assessment of the ecosystem health of urban rivers and lakes is the scientific basis for their management and ecological restoration.This study developed a three-level indicator system for its assessment.The results indicated that:Zhonghai and Nanhai are in the state of transition from unhealthy to critical state and all the other lakes are in unhealthy states.Water environmental quality,structure and function of the aquatic ecosystem,and the structure of waterfront areas were the constraints.Nanhai was ranked as poor and the others were all ranked as very poor.However,the ecological environment of Zhonghai and Nanhai were better than the others,the sums of the degree of membership to the healthy state and critical state were all close to 0.6.and the restorations of these lakes were moderate.The sums of the degree of membership to the healthy state and critical state of the other lakes were under 0.3,as it was difficult to restore these lakes.Some suggestions on scientific management and ecological restoration of the six lakes were proposed:①To control non-point pollution and to improve the water quality of six lakes and the water entering into these lakes;②To improve the hydrological conditions of six lakes;③To rehabilitate the aquatic ecosystem and waterfront areas.
文摘作为水生态保护与修复的重要理论,鱼类栖息地健康评价一直是研究重点,但缺少量化综合评价的深入研究。以长江上游中的5处典型深潭生境为例,构建了鱼类栖息地健康状况量化评价体系。研究通过长江上游典型深潭生境健康评价(一级指标)为基准,分为了栖息地环境和栖息地功能(二级指标),涵盖了水质特性、生物环境、水文环境、鱼类资源状况、栖息地质量5个三级指标以及29个四级指标,基于熵权法构建栖息地健康综合评价数学模型,通过栖息地健康综合指数(Comprehensive Health Indicator,ρ)表征典型栖息地健康状态,并对其健康状况进行综合评价。研究结果表明:长江上游典型深潭生境有1处健康等级评价为Ⅰ级,处于非常健康状态;3处评价为Ⅱ级,处于健康状态;1处评价为Ⅲ级,处于亚健康状态,无不健康或劣汰的点。总体来看,长江上游典型栖息地基本处于健康状态,且表现出较强的空间异质性,该评价结果在一定程度上客观反映了长江上游典型栖息地的健康状况,最后根据评分等级探讨了长江上游鱼类栖息地生态系统中亟需解决的问题,针对性地提出了生境修复的对策与建议。
