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- 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
- 鄱阳湖水质资源有偿使用受偿意愿的影响因素分析
- 作者： 刘桂英 来源：安徽农学通报 年份：2017 文献类型 ：期刊 关键词： 有偿使用 水质资源 鄱阳湖 影响因素 生态补偿
- 描述：通过对鄱阳湖水质资源有偿使用的实地调研,从农户受教育水平、收入水平和支出水平几个方面对鄱阳湖水质资源有偿使用受偿意愿的影响因素进行了分析。得出受教育水平对休渔期受偿意愿、候鸟保护受偿意愿、退田还湖受
- 全文：通过对鄱阳湖水质资源有偿使用的实地调研,从农户受教育水平、收入水平和支出水平几个方面对鄱阳湖水质资源有偿使用受偿意愿的影响因素进行了分析。得出受教育水平对休渔期受偿意愿、候鸟保护受偿意愿、退田还湖受
- 鄱阳湖观鸟，让心与候鸟一起飞
- 作者： 李继勇 贺泽劲 来源：广东第二课堂(初中版) 年份：2017 文献类型 ：期刊
- 描述：“鄱阳鸟，知多少，飞时遮尽云和日，落时不见湖边草。” 鄱阳湖，不仅是我国最大的淡水湖，也是内陆淡水湿地生态系统保持完整、湿地生物多样性最丰富的地区之一，吸引了许多珍稀濒危水禽、越冬珍禽，被誉为“候鸟
- 全文：“鄱阳鸟，知多少，飞时遮尽云和日，落时不见湖边草。” 鄱阳湖，不仅是我国最大的淡水湖，也是内陆淡水湿地生态系统保持完整、湿地生物多样性最丰富的地区之一，吸引了许多珍稀濒危水禽、越冬珍禽，被誉为“候鸟
- 鄱阳湖流域水资源量预测
- 作者： 钱贵伍 游黎 陈爱民 来源：安徽农业科学 年份：2017 文献类型 ：期刊 关键词： 水资源量 SRES情景 GCM模式 预测模型 气候变化
- 描述：(GCM)下的CMIP3数据,预测了鄱阳湖流域3种SRES情景下未来的水资源量,结果显示鄱阳湖流域的水资源量将有小幅增加。该研究结果可为鄱阳湖流域经济社会发展的中、长期规划提供理论支撑。
- 全文：(GCM)下的CMIP3数据,预测了鄱阳湖流域3种SRES情景下未来的水资源量,结果显示鄱阳湖流域的水资源量将有小幅增加。该研究结果可为鄱阳湖流域经济社会发展的中、长期规划提供理论支撑。
- 鄱阳湖教育高峰论坛在昌隆重举行
- 作者： 江虹 长新 锋旗 来源：江西教育 年份：2017 文献类型 ：期刊 关键词： 教育厅 论坛 大发展 职业教育 教育培训体系 教科文 鄱阳湖 人大常委会 高峰 生态经济区建设
- 描述：5月26日,由省委宣传部,省人大教科文卫委,省委教育工委、省教育厅联合举办的鄱阳湖教育高峰论坛在南昌举行。论坛
- 全文：5月26日,由省委宣传部,省人大教科文卫委,省委教育工委、省教育厅联合举办的鄱阳湖教育高峰论坛在南昌举行。论坛
- 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