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鄱阳湖水位多时间尺度动态变化特性分析
作者: 张范平 方少文 周祖昊 温天福 张梅红  来源:长江流域资源与环境 年份:2017 文献类型 :期刊 关键词: Mann  水位动态变化  鄱阳湖  Kendall  Morlet小波 
描述:、极值变化、突变特征及其周期性。结果表明:鄱阳湖水位在年内具有高动态变化的特征,月最高水位一般出现在7月份,平均水位为17.75 m,最低水位一般出现在1月份,平均水位为10.8 m,年内变化幅度达
全文:、极值变化、突变特征及其周期性。结果表明:鄱阳湖水位在年内具有高动态变化的特征,月最高水位一般出现在7月份,平均水位为17.75 m,最低水位一般出现在1月份,平均水位为10.8 m,年内变化幅度达
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   
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
鄱阳湖出流水质2004~2014 年变化及其对水位变化的响应:对水质监测频率的启示
作者: 李冰 杨桂山 万荣荣 刘宝贵 戴雪 许晨  来源:长江流域资源与环境 年份:2017 文献类型 :期刊 关键词: 变化趋势  采样频率  水质  鄱阳湖出流  水情响应 
描述:。结果表明:(1)就DO,NH4+-N和CODMn而言,鄱阳湖出湖水质在20042014年没有显著恶化的趋势,然而在年内呈现明显的周期性变化,其浓度与湖泊水位波动有较显著的负相关性(p<0.01),相关系数
全文:。结果表明:(1)就DO,NH4+-N和CODMn而言,鄱阳湖出湖水质在20042014年没有显著恶化的趋势,然而在年内呈现明显的周期性变化,其浓度与湖泊水位波动有较显著的负相关性(p<0.01),相关系数
水位变化对鄱阳湖三角洲分流河道沉积特征的影响
作者: 王军 杨勇 张阳 杨保良 蒋龙 邱隆伟 赵俊英  来源:中国石油大学学报(自然科学版) 年份:2017 文献类型 :期刊 关键词: 沉积特征  鄱阳湖三角洲  水位变化  分流河道 
描述:选取鄱阳湖赣江中支三角洲平原分流河道和信江三角洲前缘分流河道,采用现代沉积考察、剖面挖掘、粒度分析等方法,就水位变化对分流河道沉积特征的影响进行研究。结果表明:在赣江中支三角洲平原分流河道内发育滞留
全文:选取鄱阳湖赣江中支三角洲平原分流河道和信江三角洲前缘分流河道,采用现代沉积考察、剖面挖掘、粒度分析等方法,就水位变化对分流河道沉积特征的影响进行研究。结果表明:在赣江中支三角洲平原分流河道内发育滞留
基于Landsat 影像的鄱阳湖入江通道动态变化监测分析
作者: 廖启卿 况润元 袁爽 陈彦兵  来源:江西理工大学学报 年份:2017 文献类型 :期刊 关键词: 水体提取  鄱阳湖入江通道  监督分类  NDWI  Landsat卫星影像 
描述:水域、滩地、植被面积的变化情况.分析结果表明:其中水域面积从85 km~2增加到108 km~2,其趋势是先增后减再增;滩地面积从189 km~2减少到150 km~2,其趋势是先减后增再减;植被面积从
全文:水域、滩地、植被面积的变化情况.分析结果表明:其中水域面积从85 km~2增加到108 km~2,其趋势是先增后减再增;滩地面积从189 km~2减少到150 km~2,其趋势是先减后增再减;植被面积从
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.
鄱阳湖典型洲滩湿地水分补排关系
作者: 林欢 许秀丽 张奇  来源:湖泊科学 年份:2017 文献类型 :期刊 关键词: 鄱阳湖湿地  水分补排过程  根系层  HYDRUS模型  GSPAC系统  土壤水 
描述:有限的监测手段,部分界面水分通量连续动态变化数据的获取及定量化工作较为困难,目前应用数值模拟法于湿地水分运移研究的案例仍不多见.本文以鄱阳湖典型湿地为研究区,构建垂向一维数值模型,阐释了湖泊水位显著
全文:有限的监测手段,部分界面水分通量连续动态变化数据的获取及定量化工作较为困难,目前应用数值模拟法于湿地水分运移研究的案例仍不多见.本文以鄱阳湖典型湿地为研究区,构建垂向一维数值模型,阐释了湖泊水位显著
基于遥感的鄱阳湖丰水期悬浮泥沙数值模拟预测
作者: 张鹏 陈晓玲 陆建忠 张伟 肖雄武  来源:武汉大学学报(信息科学版) 年份:2017 文献类型 :期刊 关键词: 鄱阳湖  Delft3D  遥感  悬浮泥沙  数值模拟  底质 
描述:~2为0.78,该模型能够较好地进行悬浮泥沙模拟预测。对比模型模拟和遥感反演的悬浮泥沙空间分布,两者具有较好的空间一致性,进一步表明该模型能够可靠地模拟预测鄱阳湖悬浮泥沙的时空动态变化。本研究充分利用
全文:~2为0.78,该模型能够较好地进行悬浮泥沙模拟预测。对比模型模拟和遥感反演的悬浮泥沙空间分布,两者具有较好的空间一致性,进一步表明该模型能够可靠地模拟预测鄱阳湖悬浮泥沙的时空动态变化。本研究充分利用
鄱阳湖经济区经济发展协模型及经济结构动态分析
作者: 吴文新  年份:2017 文献类型 :学位论文 关键词: 动态分析  经济发展  经济结构 
描述:鄱阳湖经济区经济发展协模型及经济结构动态分析
鄱阳湖经济区经济发展协模型及经济结构动态分析
作者: 吴文新  年份:2017 文献类型 :学位论文 关键词: 动态分析  经济发展  经济结构 
描述:鄱阳湖经济区经济发展协模型及经济结构动态分析
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