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鄱阳湖湿地水位梯度下不同植物群落类型土壤有机碳组分特征
作者: 金奇 吴琴 钟欣孜 胡佳 胡启武  来源:生态学杂志 年份:2017 文献类型 :期刊 关键词: 鄱阳湖湿地  重组有机碳  可溶性有机碳  微生物生物量碳  轻组有机碳 
描述:~153.63 mg·kg-1。(2)土层、群落类型及其交互作用均对总有机碳及其组分产生显著影响,水位梯度的影响未达到显著性。(3)湿地0~30 cm土壤HFOC、LFOC、MBC和DOC占总有机碳平均比例
全文:~153.63 mg·kg-1。(2)土层、群落类型及其交互作用均对总有机碳及其组分产生显著影响,水位梯度的影响未达到显著性。(3)湿地0~30 cm土壤HFOC、LFOC、MBC和DOC占总有机碳平均比例
鄱阳湖湿地水位梯度下不同植物群落类型土壤有机碳组分特征
作者: 金奇 吴琴 钟欣孜 胡佳 胡启武  来源:生态学杂志 年份:2017 文献类型 :期刊 关键词: 鄱阳湖湿地  重组有机碳  可溶性有机碳  微生物生物量碳  轻组有机碳 
描述:~153.63 mg·kg-1。(2)土层、群落类型及其交互作用均对总有机碳及其组分产生显著影响,水位梯度的影响未达到显著性。(3)湿地0~30 cm土壤HFOC、LFOC、MBC和DOC占总有机碳平均比例
全文:~153.63 mg·kg-1。(2)土层、群落类型及其交互作用均对总有机碳及其组分产生显著影响,水位梯度的影响未达到显著性。(3)湿地0~30 cm土壤HFOC、LFOC、MBC和DOC占总有机碳平均比例
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.
高密度电阻率法在鄱阳湖圩堤防汛抢险中的应用
作者: 万怡国 高江林 邹晨阳  来源:人民长江 年份:2017 文献类型 :期刊 关键词: 隐患探测  防汛抢险  高密度电阻率法  鄱阳湖区圩堤 
描述:鄱阳湖区圩堤由于堤身环境、质量及区域地质条件等原因,易发生堤身渗漏和堤基管涌等险情,汛期高水位时,此类险情直接威胁圩堤安全。针对湖区西河东联圩堤身渗漏传统处置方法效果不佳的问题,采用高密度电阻率法
全文:鄱阳湖区圩堤由于堤身环境、质量及区域地质条件等原因,易发生堤身渗漏和堤基管涌等险情,汛期高水位时,此类险情直接威胁圩堤安全。针对湖区西河东联圩堤身渗漏传统处置方法效果不佳的问题,采用高密度电阻率法
基于EEMD的鄱阳湖流域年降水量周期预测
作者: 郭家力 祝薄丽 李英海 郭靖 张静文  来源:水电能源科学 年份:2017 文献类型 :期刊 关键词: 年降水量  EEMD  鄱阳湖  周期预测 
描述:气候变化影响下的降水量周期变化对于认识鄱阳湖枯水具有重要意义。采用EEMD方法分别将实测和模拟年降水量分解成不同频率的成分,然后采用FFT求得各IMF分量周期,以便对比未来和基准期的周期变化
全文:气候变化影响下的降水量周期变化对于认识鄱阳湖枯水具有重要意义。采用EEMD方法分别将实测和模拟年降水量分解成不同频率的成分,然后采用FFT求得各IMF分量周期,以便对比未来和基准期的周期变化
[0图]山水
作者:暂无 年份:2017 文献类型 :新闻
描述:”、“流域一体”的护江治江理念。工程为开放式全闸工程。工程功能定位为提高鄱阳湖枯水期水资源和水环境承载能力,改善供水、灌溉、生态环境、渔业、航运、血吸虫病防治等条件,保护水资源,恢复和科学调整江湖关系等综合性工程。
全文:把握“江湖两利”、“流域一体”的护江治江理念。工程为开放式全闸工程。工程功能定位为提高鄱阳湖枯水期水资源和水环境承载能力,改善供水、灌溉、生态环境、渔业、航运、血吸虫病防治等条件,保护水资源,恢复和科学调整江湖关系等综合性工程。‍‍‍‍
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
[2图]望湖亭
作者:暂无 年份:2017 文献类型 :图片
描述:,恬然自适,景色清丽。随着气候的变化,景致又各不相同。睛时岚翠如空。波壳粼粼;雨时烟水冥蒙,跳珠飞溅;风时白浪滔天,洪涛裂岸。 待到枯水季节,这里又是观赏越冬候鸟的理想之所。距其左侧300米,还专门
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