欢迎访问鄱阳湖地域文化特色库!
全部 图书 图片 报纸 期刊 新闻 视频 学位论文 会议论文
检索结果相关分组
相关搜索词
鄱阳湖湿地碟形湖泊沿高程梯度土壤养分及化学计量研究
作者: 雷学明 段洪浪 刘文飞 纪宇皝 周际海 吴建平 樊后保  来源:土壤 年份:2017 文献类型 :期刊 关键词: 高程梯度  土壤养分  碟形湖  鄱阳湖  化学计量比  南矶山湿地 
描述:在鄱阳湖南矶山湿地自然保护区的碟形湖区,沿高程梯度采集岗地、高滩、低滩和泥沼土壤,对碳、氮、磷及其化学计量特征进行了研究。结果表明,表层土壤(0~10 cm)有机碳含量在岗地土壤最低;总氮和总磷含量
全文:在鄱阳湖南矶山湿地自然保护区的碟形湖区,沿高程梯度采集岗地、高滩、低滩和泥沼土壤,对碳、氮、磷及其化学计量特征进行了研究。结果表明,表层土壤(0~10 cm)有机碳含量在岗地土壤最低;总氮和总磷含量
鄱阳湖湿地碟形湖泊沿高程梯度土壤养分及化学计量研究
作者: 雷学明 段洪浪 刘文飞 纪宇皝 周际海 吴建平 樊后保  来源:土壤 年份:2017 文献类型 :期刊 关键词: 高程梯度  土壤养分  碟形湖  鄱阳湖  化学计量比  南矶山湿地 
描述:在鄱阳湖南矶山湿地自然保护区的碟形湖区,沿高程梯度采集岗地、高滩、低滩和泥沼土壤,对碳、氮、磷及其化学计量特征进行了研究。结果表明,表层土壤(0~10 cm)有机碳含量在岗地土壤最低;总氮和总磷含量
全文:在鄱阳湖南矶山湿地自然保护区的碟形湖区,沿高程梯度采集岗地、高滩、低滩和泥沼土壤,对碳、氮、磷及其化学计量特征进行了研究。结果表明,表层土壤(0~10 cm)有机碳含量在岗地土壤最低;总氮和总磷含量
曹文宣:鄱阳湖建闸还应全面禁渔
作者:暂无 来源:科学新闻 年份:2017 文献类型 :期刊 关键词: 中国科学院院士  枢纽工程  课题研究  生物研究所    研究员  鄱阳湖  污水排放 
描述:鄱阳湖建闸第一次环评公参公示已于日前结束。参与该工程课题研究的中国科学院院士、中国科学院水生生物研究研究员曹文宣建议,在建闸的同时,要尽快实行全面禁渔,坚决取缔堑秋湖、电捕、迷魂阵等非法捕鱼作业
全文:鄱阳湖建闸第一次环评公参公示已于日前结束。参与该工程课题研究的中国科学院院士、中国科学院水生生物研究研究员曹文宣建议,在建闸的同时,要尽快实行全面禁渔,坚决取缔堑秋湖、电捕、迷魂阵等非法捕鱼作业
鄱阳湖流域乐安江悬浮物与含沙量时空变化研究
作者: 王珍  来源:东南大学 年份:2017 文献类型 :学位论文 关键词: 乐安江  含沙量  悬浮物 
描述:含沙量及日径流数据,分析乐安江流域悬浮物及含沙量的时空变化特征,并对引起其变化的影响因素做了初步分析。主要得出以下结论: (1研究期间,乐安江流域的悬浮物浓度年均值为8.59mg/L,年输出负荷为
全文:含沙量及日径流数据,分析乐安江流域悬浮物及含沙量的时空变化特征,并对引起其变化的影响因素做了初步分析。主要得出以下结论: (1研究期间,乐安江流域的悬浮物浓度年均值为8.59mg/L,年输出负荷为
鄱阳湖流域乐安江悬浮物与含沙量时空变化研究
作者: 王珍  来源:东南大学 年份:2017 文献类型 :学位论文 关键词: 乐安江  含沙量  悬浮物 
描述:含沙量及日径流数据,分析乐安江流域悬浮物及含沙量的时空变化特征,并对引起其变化的影响因素做了初步分析。主要得出以下结论: (1研究期间,乐安江流域的悬浮物浓度年均值为8.59mg/L,年输出负荷为
全文:含沙量及日径流数据,分析乐安江流域悬浮物及含沙量的时空变化特征,并对引起其变化的影响因素做了初步分析。主要得出以下结论: (1研究期间,乐安江流域的悬浮物浓度年均值为8.59mg/L,年输出负荷为
鄱阳湖流域乐安江悬浮物与含沙量时空变化研究
作者: 王珍  来源:东南大学 年份:2017 文献类型 :学位论文 关键词: 乐安江  含沙量  悬浮物 
描述:含沙量及日径流数据,分析乐安江流域悬浮物及含沙量的时空变化特征,并对引起其变化的影响因素做了初步分析。主要得出以下结论: (1研究期间,乐安江流域的悬浮物浓度年均值为8.59mg/L,年输出负荷为
全文:含沙量及日径流数据,分析乐安江流域悬浮物及含沙量的时空变化特征,并对引起其变化的影响因素做了初步分析。主要得出以下结论: (1研究期间,乐安江流域的悬浮物浓度年均值为8.59mg/L,年输出负荷为
三峡工程蓄水运行对鄱阳湖的影响
作者: 任琼 严员英 周莉荫  来源:南方林业科学 年份:2017 文献类型 :期刊 关键词: 生态环境  鄱阳湖  生物资源  综述  三峡工程 
描述:水利枢纽工程的修建必定会对河流下游的水文过程产生一定的影响,三峡工程的蓄水运行对鄱阳湖产生的影响是众多学者关注的焦点。笔者对目前三峡工程蓄水运行对鄱阳湖的影响的研究现状进行综述性地介绍,从鄱阳湖
全文:水利枢纽工程的修建必定会对河流下游的水文过程产生一定的影响,三峡工程的蓄水运行对鄱阳湖产生的影响是众多学者关注的焦点。笔者对目前三峡工程蓄水运行对鄱阳湖的影响的研究现状进行综述性地介绍,从鄱阳湖
[0图]鄱阳湖鳜鱼窒息点与耗氧率的初步研究
作者: 杨春 李达 徐光龙 张力  年份:2017 文献类型 :图书
描述:鄱阳湖鳜鱼窒息点与耗氧率的初步研究
鄱阳湖退田还湖圩区土地返耕利用的研究
作者: 杨柳 江丰 谢正磊 王军邦 廖富强 齐述华  来源:中国土地科学 年份:2017 文献类型 :期刊
描述:鄱阳湖退田还湖圩区土地返耕利用的研究
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.
上页 1 2 3 4 5 ... 6 7 8 下页
Rss订阅