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- 鄱阳湖换水周期与示踪剂传输时间特征的数值模拟
- 作者： 李云良 姚静 李梦凡 张奇 来源：湖泊科学 年份：2017 文献类型 ：期刊 关键词： 染色示踪剂 鄱阳湖 换水周期 水动力模型 空间异质性 传输时间
- 描述：系统.鄱阳湖示踪剂传输时间介于4~32 d,夏、秋季的传输时间(11~32 d)约为春、冬季(4~8 d)的4倍,主要与鄱阳湖季节性水情特征及示踪剂的迁移路径有关.本文所获取的换水周期和示踪剂传输时间的时空分布信息可为今后鄱阳湖水质、水环境和生态系统管理和维护等方面提供重要科学参考.
- 全文：系统.鄱阳湖示踪剂传输时间介于4~32 d,夏、秋季的传输时间(11~32 d)约为春、冬季(4~8 d)的4倍,主要与鄱阳湖季节性水情特征及示踪剂的迁移路径有关.本文所获取的换水周期和示踪剂传输时间的时空分布信息可为今后鄱阳湖水质、水环境和生态系统管理和维护等方面提供重要科学参考.
- 基于GIS的鄱阳湖流域生态系统服务价值结构变化
- 作者： 刘海 殷杰 林苗 陈晓玲 来源：生态学报 年份：2017 文献类型 ：期刊 关键词： GIS 可持续发展 生态系统服务价值结构 鄱阳湖流域 生态系统服务价值
- 描述：流域与子区域两个层次,计算了生态系统服务价值。并且基于威弗(Weaver)组合指数,求出了鄱阳湖各子流域的生态系统服务价值结构与坡度结构类型。分析表明,鄱阳湖流域在三个时期生态系统服务价值量持续增大,全
- 全文：流域与子区域两个层次,计算了生态系统服务价值。并且基于威弗(Weaver)组合指数,求出了鄱阳湖各子流域的生态系统服务价值结构与坡度结构类型。分析表明,鄱阳湖流域在三个时期生态系统服务价值量持续增大,全
- 鄱阳湖沙山单叶蔓荆（Ｖｉｔｅｘ ｒｏｔｕｎｄｉｆｏｌｉａ）叶性状沿沙化梯度变化特征
- 作者： 常玲玲 蔡家艳 吴琴 金奇 周红艳 胡启武 来源：中国沙漠 年份：2017 文献类型 ：期刊 关键词： 叶氮 沙山 鄱阳湖 rotundifolia) 叶磷 单叶蔓荆(Vitex 比叶面积
- 描述：在鄱阳湖湖滨沙山沿沙化梯度测定了单叶蔓荆(Vitex rotundifolia)叶面积、比叶面积、叶氮、叶磷等指标,以阐明单叶蔓荆主要叶性状特征,探讨叶性状对沙化程度的响应。结果表明:单叶蔓荆叶面积
- 全文：在鄱阳湖湖滨沙山沿沙化梯度测定了单叶蔓荆(Vitex rotundifolia)叶面积、比叶面积、叶氮、叶磷等指标,以阐明单叶蔓荆主要叶性状特征,探讨叶性状对沙化程度的响应。结果表明:单叶蔓荆叶面积
- 基于高通量测序的鄱阳湖典型湿地土壤细菌群落特征分析
- 作者： 王鹏 陈波 张华 来源：生态学报 年份：2017 文献类型 ：期刊 关键词： 鄱阳湖湿地 细菌群落结构 细菌多样性 高通量测序
- 描述：采用高通量测序技术分析了鄱阳湖典型湿地土壤细菌群落特征。测序结果表明,不同植被土壤细菌群落丰度与多样性的排序相同:苔草带>苔草-虉草带>芦苇带>泥滩带>藜蒿带。沿湖面至坡地,空间位置相近的土壤细菌
- 全文：采用高通量测序技术分析了鄱阳湖典型湿地土壤细菌群落特征。测序结果表明,不同植被土壤细菌群落丰度与多样性的排序相同:苔草带>苔草-虉草带>芦苇带>泥滩带>藜蒿带。沿湖面至坡地,空间位置相近的土壤细菌
- 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 磷
- 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
- 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.
- 鄱阳湖生态经济区农村居民点空间格局变化与特征分析
- 作者： 邓金连 李欣 叶长盛 来源：江西农业学报 年份：2017 文献类型 ：期刊 关键词： 空间格局 特征分析 鄱阳湖生态经济区 农村居民点
- 描述：以鄱阳湖生态经济区为例,结合GIS技术,采用核密度、扩展强度、平均斑块面积、紧凑度等方法分析了近20多年来农村居民点的空间格局变化特征和演变过程,希望为农村居民点用地的整理与合理规划、科学有序推进
- 全文：以鄱阳湖生态经济区为例,结合GIS技术,采用核密度、扩展强度、平均斑块面积、紧凑度等方法分析了近20多年来农村居民点的空间格局变化特征和演变过程,希望为农村居民点用地的整理与合理规划、科学有序推进
- 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：(MBC)和可溶性碳(DOC)含量,以阐明鄱阳湖典型湿地土壤有机碳及其不同组分特征与影响因子,探讨植物群落演替对有机碳库及其组分的影响。结果表明:(1)各群落0~30 cm土层SOC、HFOC、LFOC
- 全文：(MBC)和可溶性碳(DOC)含量,以阐明鄱阳湖典型湿地土壤有机碳及其不同组分特征与影响因子,探讨植物群落演替对有机碳库及其组分的影响。结果表明:(1)各群落0~30 cm土层SOC、HFOC、LFOC