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鄱阳湖藻类群落结构及其与水文条件关系研究
作者: 吴召仕  来源:中国科学院大学 年份:2014 文献类型 :学位论文
描述:鄱阳湖藻类群落结构及其与水文条件关系研究
鄱阳湖藻类群落结构及其与水文条件关系研究
作者: 吴召仕  来源:中国科学院大学 年份:2014 文献类型 :学位论文
描述:鄱阳湖藻类群落结构及其与水文条件关系研究
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.
环鄱阳湖地区有条件率先发展
作者:暂无 来源:中国联合商报 年份:2010 文献类型 :期刊
描述:环鄱阳湖地区有条件率先发展
鄱阳湖地区地下水中氟元素的背景特征及其形成
作者: 曾昭华 罗教生  来源:环境与开发 年份:1999 文献类型 :期刊 关键词: 背景特征  形成  鄱阳湖  地下水   
描述:论证了江西省鄱阳湖地区地下水中氟元素的背景特征的形成及其分布规律.结果表明,地下水氟元素的背景特征和形成与地下水含水介质成分,上覆岩土性质、地下水的酸碱度及迳流条件有密切的关系
全文:论证了江西省鄱阳湖地区地下水中氟元素的背景特征的形成及其分布规律.结果表明,地下水氟元素的背景特征和形成与地下水含水介质成分,上覆岩土性质、地下水的酸碱度及迳流条件有密切的关系
鄱阳湖湿地植物群落分布对水位变化的响应
作者: 胡玲玲 朱仁果 付建平  来源:江西化工 年份:2014 文献类型 :期刊 关键词: 水位  鄱阳湖  影响  植物群落  湿地 
描述:湿地是位于陆生生态系统和水生生态系统之间的过渡性地带,是一种土壤常年或者季节性浸泡在水中的独特生态系统。从根本上说,将湿地区别于其它陆地和水体的是它特有的植被,这些植被尤其适应湿地独一无二的土壤条件
全文:湿地是位于陆生生态系统和水生生态系统之间的过渡性地带,是一种土壤常年或者季节性浸泡在水中的独特生态系统。从根本上说,将湿地区别于其它陆地和水体的是它特有的植被,这些植被尤其适应湿地独一无二的土壤条件
鄱阳湖湿地植物群落分布对水位变化的响应
作者: 胡玲玲 朱仁果 付建平  来源:江西化工 年份:2014 文献类型 :期刊 关键词: 水位  鄱阳湖  影响  植物群落  湿地 
描述:湿地是位于陆生生态系统和水生生态系统之间的过渡性地带,是一种土壤常年或者季节性浸泡在水中的独特生态系统。从根本上说,将湿地区别于其它陆地和水体的是它特有的植被,这些植被尤其适应湿地独一无二的土壤条件
全文:湿地是位于陆生生态系统和水生生态系统之间的过渡性地带,是一种土壤常年或者季节性浸泡在水中的独特生态系统。从根本上说,将湿地区别于其它陆地和水体的是它特有的植被,这些植被尤其适应湿地独一无二的土壤条件
鄱阳湖丰水期水体中叶绿素a含量空间分布及其与环境因子的关系
作者: 吴召仕 张路 刘宝贵 陈宇炜  来源:湿地科学 年份:2014 文献类型 :期刊 关键词: 营养盐  光照  鄱阳湖  水体交换时间  丰水期  浮游植物 
描述:在2011年8月和2012年7月丰水期,在鄱阳湖湖区布设77个采样点,大规模采集水样,研究浮游植物生物量(以水体中叶绿素a含量表示)在湖区的空间分布,并探讨叶绿素a与相关环境因子之间的关系。结果表明
全文:在2011年8月和2012年7月丰水期,在鄱阳湖湖区布设77个采样点,大规模采集水样,研究浮游植物生物量(以水体中叶绿素a含量表示)在湖区的空间分布,并探讨叶绿素a与相关环境因子之间的关系。结果表明
越冬地气候条件对鄱阳湖自然保护区白琵鹭种群数量的影响
作者: 李佳 李言阔 缪泸君 谢光勇 袁芳凯 黄燕 许鹏  来源:生态学报 年份:2014 文献类型 :期刊 关键词: 越冬地  鄱阳湖自然保护区  气候变化  种群数量  白琵鹭 
描述:的种群数量与白琵鹭越冬期当年冬季各月的气温和降水变量相关系数较小,且均没有显著的相关性。同时,发现越冬地的气候条件对白琵鹭种群数量的影响存在显著的时滞效应:越冬期的月值气候变量与1—9a后的白琵鹭种群
全文:的种群数量与白琵鹭越冬期当年冬季各月的气温和降水变量相关系数较小,且均没有显著的相关性。同时,发现越冬地的气候条件对白琵鹭种群数量的影响存在显著的时滞效应:越冬期的月值气候变量与1—9a后的白琵鹭种群
越冬地气候条件对鄱阳湖自然保护区白琵鹭种群数量的影响
作者: 李佳 李言阔 缪泸君 谢光勇 袁芳凯 黄燕 许鹏  来源:生态学报 年份:2014 文献类型 :期刊 关键词: 越冬地  鄱阳湖自然保护区  气候变化  种群数量  白琵鹭 
描述:的种群数量与白琵鹭越冬期当年冬季各月的气温和降水变量相关系数较小,且均没有显著的相关性。同时,发现越冬地的气候条件对白琵鹭种群数量的影响存在显著的时滞效应:越冬期的月值气候变量与1—9a后的白琵鹭种群
全文:的种群数量与白琵鹭越冬期当年冬季各月的气温和降水变量相关系数较小,且均没有显著的相关性。同时,发现越冬地的气候条件对白琵鹭种群数量的影响存在显著的时滞效应:越冬期的月值气候变量与1—9a后的白琵鹭种群
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