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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
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.
鄱阳湖4种鹤类集群特征与成幼组成的时空变化
作者: 邵明勤 蒋剑虹 戴年华 卢萍  来源:生态学报 年份:2017 文献类型 :期刊
描述:鄱阳湖4种鹤类集群特征与成幼组成的时空变化
鄱阳湖流域参考作物蒸散量变化特征及其归因分析
作者: 涂安国 李英 聂小飞 莫名浩  来源:生态环境学报 年份:2017 文献类型 :期刊
描述:鄱阳湖流域参考作物蒸散量变化特征及其归因分析
鄱阳湖湖滨沙山垄状地形的成因
作者: 韩志勇 李徐生 张兆干 陈英勇 杨达源 弋双文 鹿化煜  来源:地理学报 年份:2017 文献类型 :期刊
描述:地形不是纵向沙丘。垄状地形内部发育平行层理,缺少滑动面,则进一步表明垄状地形并非沙丘。对垄状地形之间的沟谷形态观察后发现,这些沟谷与前丘上槽形风蚀坑形态颇为相似,且沙山的环境具备发育槽形风蚀坑的基本条件
全文:地形不是纵向沙丘。垄状地形内部发育平行层理,缺少滑动面,则进一步表明垄状地形并非沙丘。对垄状地形之间的沟谷形态观察后发现,这些沟谷与前丘上槽形风蚀坑形态颇为相似,且沙山的环境具备发育槽形风蚀坑的基本条件
鄱阳湖湿地典型草洲主要植物种群在5 个资源环境梯度上的生态位特征
作者: 段后浪 赵安 姚忠  来源:生态与农村环境学报 年份:2017 文献类型 :期刊 关键词: 鄱阳湖典型湿地  生态位宽度  生态位重叠  植物种群 
描述:基于鄱阳湖典型湿地恒湖农场茶叶港草洲19个样地(5 m×5 m)95个样方(11 m)实地调查得到的10种主要植物和高程、土壤pH值、电导率、含水量、有机质含量5个资源环境数据,采用
全文:基于鄱阳湖典型湿地恒湖农场茶叶港草洲19个样地(5 m×5 m)95个样方(11 m)实地调查得到的10种主要植物和高程、土壤pH值、电导率、含水量、有机质含量5个资源环境数据,采用
鄱阳湖湿地典型草洲主要植物种群在5 个资源环境梯度上的生态位特征
作者: 段后浪 赵安 姚忠  来源:生态与农村环境学报 年份:2017 文献类型 :期刊 关键词: 鄱阳湖典型湿地  生态位宽度  生态位重叠  植物种群 
描述:基于鄱阳湖典型湿地恒湖农场茶叶港草洲19个样地(5 m×5 m)95个样方(11 m)实地调查得到的10种主要植物和高程、土壤pH值、电导率、含水量、有机质含量5个资源环境数据,采用
全文:基于鄱阳湖典型湿地恒湖农场茶叶港草洲19个样地(5 m×5 m)95个样方(11 m)实地调查得到的10种主要植物和高程、土壤pH值、电导率、含水量、有机质含量5个资源环境数据,采用
鄱阳湖不同区域沉积物细菌群落结构、功能变化及其与环境因子的关系
作者: 金笑 寇文伯 于昊天 刘亚军 马燕天 吴兰  来源:环境科学研究 年份:2017 文献类型 :期刊 关键词: 微生物代谢功能  T  细菌群落结构  Biolog  鄱阳湖  RFLP分析  Eco微平板法 
描述:为了解鄱阳湖湖区内具有不同形态、功能的沉积物微生物群落的空间差异,采用T-RFLP(末端限制性片段长度多态性)和Biolog-Eco微平板法,对松门山(主湖区)、饶河(入湖口)、南矶山(碟形湖
全文:为了解鄱阳湖湖区内具有不同形态、功能的沉积物微生物群落的空间差异,采用T-RFLP(末端限制性片段长度多态性)和Biolog-Eco微平板法,对松门山(主湖区)、饶河(入湖口)、南矶山(碟形湖
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