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鄱阳湖沉积物中磷吸附释放特性及影响因素研究
作者: 徐进 徐力刚 龚然 丁克强  来源:生态环境学报 年份:2014 文献类型 :期刊 关键词: 沉积物  释放  吸附  鄱阳湖   
描述:沉积物是氮磷营养盐的主要蓄积库,它不仅是外来污染物的归宿地,同时其自身营养盐的释放也可对水环境产生重大影响。针对鄱阳湖存在的沉积物磷释放问题,关键环境因子对基质磷吸附的影响规律进行了探讨。通过控制在
全文:沉积物是氮磷营养盐的主要蓄积库,它不仅是外来污染物的归宿地,同时其自身营养盐的释放也可对水环境产生重大影响。针对鄱阳湖存在的沉积物磷释放问题,关键环境因子对基质磷吸附的影响规律进行了探讨。通过控制在
鄱阳湖苔草湿地甲烷释放特征
作者: 胡启武 朱丽丽 幸瑞新 尧波 胡斌华  来源:生态学报 年份:2011 文献类型 :期刊 关键词: 鄱阳湖  甲烷  湿地  灰化苔草 
描述:草湿地的甲烷(CH4)释放通量。结果表明:1)TC、TJ 2个试验处理CH4释放速率变化范围分别为-0.094—17.75 mg.m-.2h-1、-0.122—19.16 mg.m-.2h-1,均
全文:草湿地的甲烷(CH4)释放通量。结果表明:1)TC、TJ 2个试验处理CH4释放速率变化范围分别为-0.094—17.75 mg.m-.2h-1、-0.122—19.16 mg.m-.2h-1,均
江湖关系变化对鄱阳湖沉积物氨氮释放风险的影响
作者: 何宗健 吴志强 倪兆奎 刘婉清 王圣瑞  来源:中国环境科学 年份:2014 文献类型 :期刊 关键词: 江湖关系  沉积物  鄱阳湖  释放风险  氨氮 
描述:选取了鄱阳湖北部湖区、"五河"入湖尾闾区、湖心区共14个不同高程的表层出露沉积物样品,通过研究其总氮(TN)含量和氨氮(NH4+-N)释放热力学及动力学特征,试图揭示江湖关系变化导致的水位变化对
全文:选取了鄱阳湖北部湖区、"五河"入湖尾闾区、湖心区共14个不同高程的表层出露沉积物样品,通过研究其总氮(TN)含量和氨氮(NH4+-N)释放热力学及动力学特征,试图揭示江湖关系变化导致的水位变化对
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   
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
鄱阳湖典型沉水植物分布区CO2、CH4释放日变化特征
作者: 聂兰琴 付姗 吴琴 胡启武  来源:江西师范大学学报(自然科学版) 年份:2014 文献类型 :期刊 关键词: 鄱阳湖  CO2  CH4  沉水植物区 
描述:为进一步准确评估鄱阳湖湿地碳平衡,探讨不同湿地类型碳排放特征与控制因子,在鄱阳湖南矶湿地国家级自然保护区选择典型沉水植物分布区进行了 CO2、CH4释放的昼夜变化观测.结果表明:1)CO2、CH4
全文:为进一步准确评估鄱阳湖湿地碳平衡,探讨不同湿地类型碳排放特征与控制因子,在鄱阳湖南矶湿地国家级自然保护区选择典型沉水植物分布区进行了 CO2、CH4释放的昼夜变化观测.结果表明:1)CO2、CH4
鄱阳湖苔草湿地非淹水期CO2释放特征
作者: 胡启武 幸瑞新 朱丽丽 吴琴 尧波 刘影 胡斌华  来源:应用生态学报 年份:2011 文献类型 :期刊 关键词: Q10  土壤呼吸  鄱阳湖  湿地  生态系统呼吸 
描述:呼吸),利用密闭箱-气相色谱法测定了非淹水期鄱阳湖苔草湿地CO,释放通量.结果表明:苔草湿地生态系统呼吸与土壤呼吸均具有明显的季节变化模式,释放速率变化范围分别为89.57~1243.99和75.30
全文:呼吸),利用密闭箱-气相色谱法测定了非淹水期鄱阳湖苔草湿地CO,释放通量.结果表明:苔草湿地生态系统呼吸与土壤呼吸均具有明显的季节变化模式,释放速率变化范围分别为89.57~1243.99和75.30
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.
鄱阳湖水体氧化亚氮排放特征及影响因素
作者: 徐会显 姜星宇 姚晓龙 张路  来源:湖泊科学 年份:2016 文献类型 :期刊 关键词: 排放  季节变化  鄱阳湖  氧化亚氮 
描述:于2014年4、7和10月以及2015年1月(分别代表春、夏、秋和冬季)对鄱阳湖13个常规监测点表层水体中氧化亚氮(N2O)浓度进行测定,并选择合适的模型估算其释放量.结果表明,鄱阳湖全年N2O平均
全文:于2014年4、7和10月以及2015年1月(分别代表春、夏、秋和冬季)对鄱阳湖13个常规监测点表层水体中氧化亚氮(N2O)浓度进行测定,并选择合适的模型估算其释放量.结果表明,鄱阳湖全年N2O平均
鄱阳湖湿地生态系统服务功能价值评估
作者: 鄢帮有  来源:资源科学 年份:2004 文献类型 :期刊
描述:1381.01×10^8元/年,价值大,并且类型全面。其主要服务功能包括涵养水源、调蓄洪水、减少土壤肥力流失、文化科研、生物栖息地、净化、CO2固定和O2释放、有机物质生产等,以涵养水源、调蓄洪水的服务
全文:1381.01×10^8元/年,价值大,并且类型全面。其主要服务功能包括涵养水源、调蓄洪水、减少土壤肥力流失、文化科研、生物栖息地、净化、CO2固定和O2释放、有机物质生产等,以涵养水源、调蓄洪水的服务
鄱阳湖湿地生态系统服务功能价值评估
作者: 鄢帮有  来源:资源科学 年份:2004 文献类型 :期刊
描述:1381.01×10^8元/年,价值大,并且类型全面。其主要服务功能包括涵养水源、调蓄洪水、减少土壤肥力流失、文化科研、生物栖息地、净化、CO2固定和O2释放、有机物质生产等,以涵养水源、调蓄洪水的服务
全文:1381.01×10^8元/年,价值大,并且类型全面。其主要服务功能包括涵养水源、调蓄洪水、减少土壤肥力流失、文化科研、生物栖息地、净化、CO2固定和O2释放、有机物质生产等,以涵养水源、调蓄洪水的服务
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