检索结果相关分组
- 鄱阳湖沉积物有机磷形态及对水位变化响应
- 作者： 马双丽 倪兆奎 王圣瑞 李晓秀 倪栋 来源：环境科学学报 年份：2016 文献类型 ：期刊 关键词： 水位变化 沉积物 有机磷形态 鄱阳湖
- 描述：选取鄱阳湖枯水期不同高程出露表层沉积物,通过研究有机磷含量及形态差异,试图揭示江湖关系变化引起的水位下降对鄱阳湖沉积物有机磷潜在释放风险的影响.结果表明:1鄱阳湖枯水期表层沉积物有机磷含量
- 全文：选取鄱阳湖枯水期不同高程出露表层沉积物,通过研究有机磷含量及形态差异,试图揭示江湖关系变化引起的水位下降对鄱阳湖沉积物有机磷潜在释放风险的影响.结果表明:1鄱阳湖枯水期表层沉积物有机磷含量
- 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.
- 鄱阳湖氮、磷营养盐的滞留效应研究
- 作者： 胡春华 楼倩 丁文军 周文斌 来源：环境污染与防治 年份：2012 文献类型 ：期刊 关键词： 营养盐 鄱阳湖 滞留效应
- 描述：、DIN的实际滞留效率随季节变化呈现出较一致的周期波动性;TP、DIN滞留的主要影响因素为径流输入、非点源污染输入以及经湖口的输出,降雨、降尘、底泥释放、生物滞留对其影响相对较小;鄱阳湖氮、磷收支估算
- 全文：、DIN的实际滞留效率随季节变化呈现出较一致的周期波动性;TP、DIN滞留的主要影响因素为径流输入、非点源污染输入以及经湖口的输出,降雨、降尘、底泥释放、生物滞留对其影响相对较小;鄱阳湖氮、磷收支估算
- 鄱阳湖湿地锰的分布特征及对重金属影响因素的研究
- 作者： 曹俊秀 来源：南昌大学 年份：2012 文献类型 ：学位论文 关键词： 锰 氧化锰 释放 吸附 鄱阳湖 重金属
- 描述：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 全文：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 鄱阳湖湿地锰的分布特征及对重金属影响因素的研究
- 作者： 曹俊秀 来源：南昌大学 年份：2012 文献类型 ：学位论文 关键词： 锰 氧化锰 释放 吸附 鄱阳湖 重金属
- 描述：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 全文：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 鄱阳湖湿地锰的分布特征及对重金属影响因素的研究
- 作者： 曹俊秀 来源：南昌大学 年份：2012 文献类型 ：学位论文 关键词： 锰 氧化锰 释放 吸附 鄱阳湖 重金属
- 描述：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 全文：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 鄱阳湖湿地锰的分布特征及对重金属影响因素的研究
- 作者： 曹俊秀 来源：南昌大学 年份：2012 文献类型 ：学位论文 关键词： 锰 氧化锰 释放 吸附 鄱阳湖 重金属
- 描述：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 全文：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 鄱阳湖湿地锰的分布特征及对重金属影响因素的研究
- 作者： 曹俊秀 来源：南昌大学 年份：2012 文献类型 ：学位论文 关键词： 锰 氧化锰 释放 吸附 鄱阳湖 重金属
- 描述：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1
- 全文：实验室模拟相结合,对鄱阳湖典型湿地土壤的理化性质和活性锰及全锰的分布特征进行了系统全面的研究,在此基础上,通过实验室模拟的方法,研究湿地土壤及氧化锰吸附和释放重金属的影响因素,主要研究结果如下：(1