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- 鄱阳湖枯水期沉积物磷释放特征及对水位变化响应
- 作者： 王悦敏 倪兆奎 冯明雷 刘志刚 王圣瑞 李晓秀 来源：环境科学学报 年份：2017 文献类型 ：期刊 关键词： 释放特征 水位 沉积物 鄱阳湖 磷
- 描述：通过研究鄱阳湖枯水期不同高程沉积物磷释放热力学和动力学特征,试图建立沉积物磷释放与水位间响应关系,进一步揭示由于江湖关系变化导致的水位下降对鄱阳湖沉积物磷释放风险影响.结果表明:(1)鄱阳湖沉积物
- 全文：通过研究鄱阳湖枯水期不同高程沉积物磷释放热力学和动力学特征,试图建立沉积物磷释放与水位间响应关系,进一步揭示由于江湖关系变化导致的水位下降对鄱阳湖沉积物磷释放风险影响.结果表明:(1)鄱阳湖沉积物
- 模拟研究变化水位和流速条件下鄱阳湖磷释放特征
- 作者： 童亚莉 梁涛 王凌青 李可欣 来源：Journal of Geographical Sciences 年份：2017 文献类型 ：期刊
- 描述：Since the construction of the Three Gorges Dam,the Poyang Lake hydrological characteristics obviously changed.During the impoundment period of the Three Gorges Reservoir,the hydrodynamic factors of Poyang Lake varied.Water level dropped,the velocity decreased and water exchange time lengthened,which changed the release of phosphorous from sediments.In order to investigate how the hydrodynamic factors influence the release of phosphorous from sediments,we used a two-way annular flume device to simulate the release characteristics of phosphorous from sediments under variable water levels and velocities.We found that both water level rising and velocity increasing could enhance the disturbance intensity to sediments,which caused the increase of suspended solids(SS)concentration,total phosphorus(TP)concentration in the overlying water,and the ability that phosphorus released to overlying water from sediments enhanced as well:when overlying water velocity maintained 0.3 m/s,SS concentration increased to 4035.85 mg/L at the water level25 cm which was about 25 times compared to the minimum value and TP concentration in the overlying water also reached the maximum value at the water level 25 cm which was 1.2times that of the value at 10 cm;when water level maintained 15 cm,SS concentration increased to 4363.35 mg/L at the velocity of 0.5 m/s which was about 28 times compared to the value of 0 m/s,and TP concentration in the overlying water increased from 0.11 mg/L to 0.44mg/L.When the water level maintained 15 cm,the phosphorous release rate reached the maximum value of 4.86 mg/(md)at 0.4 m/s.The concentration of total dissolved phosphorous(TDP)and soluble reactive phosphate(SRP)both in overlying water and sediment-water interface were negatively correlated with p H.Using the parabolic equation,the optimum water level at a velocity of 0.3 m/s was calculated to be 0.57 cm,and the optimum velocity at water level of 15 cm was found to be 0.2 m/s.
- 全文：Since the construction of the Three Gorges Dam,the Poyang Lake hydrological characteristics obviously changed.During the impoundment period of the Three Gorges Reservoir,the hydrodynamic factors of Poyang Lake varied.Water level dropped,the velocity decreased and water exchange time lengthened,which changed the release of phosphorous from sediments.In order to investigate how the hydrodynamic factors influence the release of phosphorous from sediments,we used a two-way annular flume device to simulate the release characteristics of phosphorous from sediments under variable water levels and velocities.We found that both water level rising and velocity increasing could enhance the disturbance intensity to sediments,which caused the increase of suspended solids(SS)concentration,total phosphorus(TP)concentration in the overlying water,and the ability that phosphorus released to overlying water from sediments enhanced as well:when overlying water velocity maintained 0.3 m/s,SS concentration increased to 4035.85 mg/L at the water level25 cm which was about 25 times compared to the minimum value and TP concentration in the overlying water also reached the maximum value at the water level 25 cm which was 1.2times that of the value at 10 cm;when water level maintained 15 cm,SS concentration increased to 4363.35 mg/L at the velocity of 0.5 m/s which was about 28 times compared to the value of 0 m/s,and TP concentration in the overlying water increased from 0.11 mg/L to 0.44mg/L.When the water level maintained 15 cm,the phosphorous release rate reached the maximum value of 4.86 mg/(md)at 0.4 m/s.The concentration of total dissolved phosphorous(TDP)and soluble reactive phosphate(SRP)both in overlying water and sediment-water interface were negatively correlated with p H.Using the parabolic equation,the optimum water level at a velocity of 0.3 m/s was calculated to be 0.57 cm,and the optimum velocity at water level of 15 cm was found to be 0.2 m/s.
- 吴城鄱阳湖自然保护区鱼体中重金属的富集及安全性评价
- 作者： 涂宗财 庞娟娟 郑婷婷 唐平平 王辉 张露 沙小梅 陈雪岚 来源：水生生物学报 年份：2017 文献类型 ：期刊 关键词： 富集 淡水鱼 吴城鄱阳湖自然保护区 安全性评价 重金属
- 描述：含量要高于其它3种元素。4种重金属在鱼肌肉中的含量均符合国内外标准。目标危险系数(THQ)分析结果表明,Pb导致的健康风险最高,Cd最低,单一重金属THQ值和复合重金属TTHQ值均小于1,说明吴城鄱阳湖自然保护区鱼类重金属的污染程度较低,不会对消费者健康产生潜在危害。
- 全文：含量要高于其它3种元素。4种重金属在鱼肌肉中的含量均符合国内外标准。目标危险系数(THQ)分析结果表明,Pb导致的健康风险最高,Cd最低,单一重金属THQ值和复合重金属TTHQ值均小于1,说明吴城鄱阳湖自然保护区鱼类重金属的污染程度较低,不会对消费者健康产生潜在危害。
- 吴城鄱阳湖自然保护区鱼体中重金属的富集及安全性评价
- 作者： 涂宗财 庞娟娟 郑婷婷 唐平平 王辉 张露 沙小梅 陈雪岚 来源：水生生物学报 年份：2017 文献类型 ：期刊 关键词： 富集 淡水鱼 吴城鄱阳湖自然保护区 安全性评价 重金属
- 描述：含量要高于其它3种元素。4种重金属在鱼肌肉中的含量均符合国内外标准。目标危险系数(THQ)分析结果表明,Pb导致的健康风险最高,Cd最低,单一重金属THQ值和复合重金属TTHQ值均小于1,说明吴城鄱阳湖自然保护区鱼类重金属的污染程度较低,不会对消费者健康产生潜在危害。
- 全文：含量要高于其它3种元素。4种重金属在鱼肌肉中的含量均符合国内外标准。目标危险系数(THQ)分析结果表明,Pb导致的健康风险最高,Cd最低,单一重金属THQ值和复合重金属TTHQ值均小于1,说明吴城鄱阳湖自然保护区鱼类重金属的污染程度较低,不会对消费者健康产生潜在危害。
- 鄱阳湖水利枢纽 “为”生态还是“伪”生态?亦或开发与保护之争?
- 作者： 陈家宽 赖锡军 蒋勇 韦宝玉 钱烨 来源：中国周刊 年份：2017 文献类型 ：期刊
- 描述：“坝”改为“闸”,由全年控制改为分期控制等,并且针对反对者提出来的关于潜在生态风险的质疑,对工程的功能定位、调度方式等进行了不断的优化,并指出工程是为了保水,缓解鄱阳湖枯水所带来的生态和民生问题,甚至
- 全文：“坝”改为“闸”,由全年控制改为分期控制等,并且针对反对者提出来的关于潜在生态风险的质疑,对工程的功能定位、调度方式等进行了不断的优化,并指出工程是为了保水,缓解鄱阳湖枯水所带来的生态和民生问题,甚至
- 鄱阳湖典型湿地土壤DDTs残留及其相关性研究
- 作者： 李俊 来源：上海大学 年份：2017 文献类型 ：学位论文 关键词： DDTs残留 鄱阳湖 典型湿地土壤 营养元素 空间分布
- 描述：上进行了实验，建立了符合鄱阳湖吴城区土壤残留DDTs测定的方法，对DDTs残留组分、分布及其来源进行了分析。本研究中DDTs的总量分布在0.140~6.981 ng•g-1，年平均值为2.138ng
- 全文：上进行了实验，建立了符合鄱阳湖吴城区土壤残留DDTs测定的方法，对DDTs残留组分、分布及其来源进行了分析。本研究中DDTs的总量分布在0.140~6.981 ng•g-1，年平均值为2.138ng