检索结果相关分组
- 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(1 m×1 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(1 m×1 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
- 鄱阳湖水利枢纽 “为”生态还是“伪”生态?亦或开发与保护之争?
- 作者： 陈家宽 赖锡军 蒋勇 韦宝玉 钱烨 来源：中国周刊 年份：2017 文献类型 ：期刊
- 描述：方案》的文章中说:鉴于鄱阳湖在全球生态格局中具有无可替代的生态地位,阻隔江湖联系的鄱阳湖水利枢纽工程建设,将对生态造成巨大的负面影响,为了“一湖清水”,不能只将建设水利枢纽作为唯一途径,无坝(闸)替代
- 全文：方案》的文章中说:鉴于鄱阳湖在全球生态格局中具有无可替代的生态地位,阻隔江湖联系的鄱阳湖水利枢纽工程建设,将对生态造成巨大的负面影响,为了“一湖清水”,不能只将建设水利枢纽作为唯一途径,无坝(闸)替代
- 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
- 鄱阳湖湿地泗洲头洲滩浅层土壤氮素的时空特征
- 作者： 谢冬明 周国宏 陈亚云 周杨明 贾俊松 熊晓龙 余明泉 来源：江西师范大学学报(自然科学版) 年份：2017 文献类型 ：期刊 关键词： 鄱阳湖湿地 土壤氮素 洲滩湿地 空间分异
- 描述：湿地是全球氮循环的N源、N汇和N转化器,自然湿地氮的研究对于揭示生态系统氮循环的规律具有重要意义.以鄱阳湖湿地泗洲头为研究区域,根据湿地海拔高程梯度(10~17 m)采取表层土壤0~20 cm土层
- 全文：湿地是全球氮循环的N源、N汇和N转化器,自然湿地氮的研究对于揭示生态系统氮循环的规律具有重要意义.以鄱阳湖湿地泗洲头为研究区域,根据湿地海拔高程梯度(10~17 m)采取表层土壤0~20 cm土层
- 鄱阳湖湿地泗洲头洲滩浅层土壤氮素的时空特征
- 作者： 谢冬明 周国宏 陈亚云 周杨明 贾俊松 熊晓龙 余明泉 来源：江西师范大学学报(自然科学版) 年份：2017 文献类型 ：期刊 关键词： 鄱阳湖湿地 土壤氮素 洲滩湿地 空间分异
- 描述：湿地是全球氮循环的N源、N汇和N转化器,自然湿地氮的研究对于揭示生态系统氮循环的规律具有重要意义.以鄱阳湖湿地泗洲头为研究区域,根据湿地海拔高程梯度(10~17 m)采取表层土壤0~20 cm土层
- 全文：湿地是全球氮循环的N源、N汇和N转化器,自然湿地氮的研究对于揭示生态系统氮循环的规律具有重要意义.以鄱阳湖湿地泗洲头为研究区域,根据湿地海拔高程梯度(10~17 m)采取表层土壤0~20 cm土层
- [0图]鄱阳湖资源环境与人类活动研究
- 作者： 舒晓波 来源：南昌：江西人民出版社 年份：2017 文献类型 ：图书 关键词： 生态环境 流域 文集 鄱阳湖 人类活动影响
- 描述：本书系江西师范大学鄱阳湖湿地与流域研究实验室2004年至2013年间以湿地与流域研究为主题公开发表的学术论文集。全书主要包括鄱阳湖环境灾害与公共卫生研究、鄱阳湖土地利用与土地覆盖研究、鄱阳湖区域格局与区域政策研究、鄱阳湖人类活动与生态环境研究。
- 全文：本书系江西师范大学鄱阳湖湿地与流域研究实验室2004年至2013年间以湿地与流域研究为主题公开发表的学术论文集。全书主要包括鄱阳湖环境灾害与公共卫生研究、鄱阳湖土地利用与土地覆盖研究、鄱阳湖区域格局与区域政策研究、鄱阳湖人类活动与生态环境研究。
- [0图]低碳经济与区域发展 以鄱阳湖生态经济区为例
- 作者： 李志萌 来源：北京：中国社会科学出版社 年份：2017 文献类型 ：图书
- 描述：低碳经济与区域发展 以鄱阳湖生态经济区为例