检索结果相关分组
- 鄱阳湖流域农村饮用水水环境特征及其污染机理研究
- 作者： 陈慧杰 来源：南昌大学 年份：2012 文献类型 ：学位论文 关键词： 洪涝灾害 地下饮用水 环鄱阳湖区 污染物迁移扩散 健康风险评价
- 描述：随着鄱阳湖环湖区农村城镇化和工业化的不断推进,鄱阳湖区域水环境的污染问题日益显现,农村居民饮用水(地表水及浅层地下水)的安全问题引起了越来越多的关注。同时,近几年来洪涝、干旱等自然灾害频繁发生,造成
- 全文：随着鄱阳湖环湖区农村城镇化和工业化的不断推进,鄱阳湖区域水环境的污染问题日益显现,农村居民饮用水(地表水及浅层地下水)的安全问题引起了越来越多的关注。同时,近几年来洪涝、干旱等自然灾害频繁发生,造成
- 鄱阳湖生态旅游服务贸易体系建设的有利条件和不利因素
- 作者： 陈宇琦 李玲 倪贺 来源：中国商界(下半月) 年份：2010 文献类型 ：期刊 关键词： 服务贸易 生态旅游 鄱阳湖生态经济区
- 描述：本文对江西鄱阳湖生态经济区建设中加强鄱阳湖生态旅游服务贸易体系建设的国内外背景进行了深度分析的基础上,研究了建设鄱阳湖生态旅游服务贸易体系的有利条件和不利因素,认为,既有旅游资源、地缘生态和客源市场方面的优势,又有突出生态旅游与国际服务贸易的结合,即国际生态旅游并提出了若干具体建议。
- 全文：本文对江西鄱阳湖生态经济区建设中加强鄱阳湖生态旅游服务贸易体系建设的国内外背景进行了深度分析的基础上,研究了建设鄱阳湖生态旅游服务贸易体系的有利条件和不利因素,认为,既有旅游资源、地缘生态和客源市场方面的优势,又有突出生态旅游与国际服务贸易的结合,即国际生态旅游并提出了若干具体建议。
- 鄱阳湖典型湿地沉水植物的分布格局及其水环境影响因子
- 作者： 简敏菲 简美锋 李玲玉 汪斯琛 余厚平 余冠军 来源：长江流域资源与环境 年份：2015 文献类型 ：期刊 关键词： 鄱阳湖湿地 主成分分析 双向指示种分析 水环境因子 典范对应分析 沉水植物
- 描述：沉水植物是湖泊湿地生态系统中关键组分,调查研究沉水植物分布格局及其水环境影响因子,对于沉水植被的恢复与重建具有重要的指导意义。2013年5月初期分别对鄱阳湖典型湿地区域中有沉水植物的25个样地进行
- 全文：沉水植物是湖泊湿地生态系统中关键组分,调查研究沉水植物分布格局及其水环境影响因子,对于沉水植被的恢复与重建具有重要的指导意义。2013年5月初期分别对鄱阳湖典型湿地区域中有沉水植物的25个样地进行
- 鄱阳湖流域人为氮磷输入演变及湖泊水环境响应
- 作者： 高伟 高波 严长安 刘永 来源：环境科学学报 年份：2016 文献类型 ：期刊 关键词： 营养盐 非点源 人类活动净氮输入 鄱阳湖 富营养 人类活动净磷输入
- 描述：人类活动导致的氮磷营养盐富集是我国湖泊富营养化问题形成的重要驱动力.鄱阳湖是我国最大的淡水湖泊,随着流域经济社会的迅速发展,湖体营养盐水平上升,降低了鄱阳湖及长江中下游地区的水环境质量.然而,人类对
- 全文：人类活动导致的氮磷营养盐富集是我国湖泊富营养化问题形成的重要驱动力.鄱阳湖是我国最大的淡水湖泊,随着流域经济社会的迅速发展,湖体营养盐水平上升,降低了鄱阳湖及长江中下游地区的水环境质量.然而,人类对
- 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
- 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.