检索结果相关分组
- 鄱阳湖特大桥36号主墩钢围堰施工专项方案
- 作者： 郭跃 来源：四川水泥 年份：2016 文献类型 ：期刊 关键词： 预防措施 围堰施工工序 鄱阳湖特大桥
- 描述：桥梁工程建设中,围堰的施工技术是工程施工中的重点和难点,本文结合一个实际的桥梁施工方案,对它的施工设计和整体部署进行介绍,对该项工程的围堰施工的具体流程进行分析,做好各个方面的预防工作,为本项工程能够顺利、安全完工提供参考资料。
- 全文：桥梁工程建设中,围堰的施工技术是工程施工中的重点和难点,本文结合一个实际的桥梁施工方案,对它的施工设计和整体部署进行介绍,对该项工程的围堰施工的具体流程进行分析,做好各个方面的预防工作,为本项工程能够顺利、安全完工提供参考资料。
- 环鄱阳湖城市群：生态保护与发展经济兼顾
- 作者：暂无 来源：小康 年份：2015 文献类型 ：期刊
- 描述：环鄱阳湖城市群：生态保护与发展经济兼顾
- 鄱阳湖入湖主要污染物浓度变化趋势分析
- 作者： 贾娟娟 罗勇 张健 陈晓峰 肖南娇 来源：江西科学 年份：2015 文献类型 ：期刊 关键词： 趋势分析 水质 主要污染物
- 描述：通过同步监测2010-2014年入湖监测断面水质,分析了化学需氧量、氨氮、总磷和总氮4项污染物的变化趋势。结果表明,除总磷外,化学需氧量、氨氮和总氮3项污染物浓度总体上均有不同程度的上升趋势,应引起有关部门的重视。
- 全文：通过同步监测2010-2014年入湖监测断面水质,分析了化学需氧量、氨氮、总磷和总氮4项污染物的变化趋势。结果表明,除总磷外,化学需氧量、氨氮和总氮3项污染物浓度总体上均有不同程度的上升趋势,应引起有关部门的重视。
- 鄱阳湖非平稳水位波动及其与长江的交互作用关系
- 作者： 戴雪 万荣荣 杨桂山 来源：地理学报(英文版) 年份：2015 文献类型 ：期刊 关键词： Yangtze earlier seasonal intensified downstream lacustrine river representative flood dominate
- 描述：Seasonal water-level fluctuations(WLF) play a dominate role in lacustrine ecosystems. River-lake interaction is a direct factor in changes of seasonal lake WLF, especially for those lakes naturally connected to upstream and downstream rivers. During the past decade, the modification of WLF in the Poyang Lake(the largest freshwater lake in China) has caused intensified flood and irrigation crises, reduced water availability, compromised water quality and extensive degradation of the lake ecosystem. There has been a conjecture as to whether the modification was caused by its interactions with Yangtze River. In this study, we investigated the variations of seasonal WLF in China’s Poyang Lake by comparing the water levels during the four distinct seasons(the dry season, the rising season, the flood season, and the retreating season) before and after 2003 when the Three Gorge Dam operated. The Water Surface Slope(WSS) was used as a representative parameter to measure the changes in river-lake interaction and its impacts on seasonal WLF. The results showed that the magnitude of seasonal WLF has changed considerably since 2003; the seasonal WLF of the Poyang Lake have been significantly altered by the fact that the water levels both rise and retreat earlier in the season and lowered water levels in general. The fluctuations of river-lake interactions, in particular the changes during the retreating season, are mainly responsible for these variations in magnitude of seasonal WLF. This study demonstrates that WSS is a representative parameter to denote river-lake interactions, and the results indicate that more emphasis should be placed on the decrease of the Poyang Lake caused by the lowered water levels of the Yangtze River, especially in the retreating season.
- 全文：Seasonal water-level fluctuations(WLF) play a dominate role in lacustrine ecosystems. River-lake interaction is a direct factor in changes of seasonal lake WLF, especially for those lakes naturally connected to upstream and downstream rivers. During the past decade, the modification of WLF in the Poyang Lake(the largest freshwater lake in China) has caused intensified flood and irrigation crises, reduced water availability, compromised water quality and extensive degradation of the lake ecosystem. There has been a conjecture as to whether the modification was caused by its interactions with Yangtze River. In this study, we investigated the variations of seasonal WLF in China’s Poyang Lake by comparing the water levels during the four distinct seasons(the dry season, the rising season, the flood season, and the retreating season) before and after 2003 when the Three Gorge Dam operated. The Water Surface Slope(WSS) was used as a representative parameter to measure the changes in river-lake interaction and its impacts on seasonal WLF. The results showed that the magnitude of seasonal WLF has changed considerably since 2003; the seasonal WLF of the Poyang Lake have been significantly altered by the fact that the water levels both rise and retreat earlier in the season and lowered water levels in general. The fluctuations of river-lake interactions, in particular the changes during the retreating season, are mainly responsible for these variations in magnitude of seasonal WLF. This study demonstrates that WSS is a representative parameter to denote river-lake interactions, and the results indicate that more emphasis should be placed on the decrease of the Poyang Lake caused by the lowered water levels of the Yangtze River, especially in the retreating season.
- 鄱阳湖水利枢纽与渔业关系探讨
- 作者： 吴斌 傅培峰 胡文娟 王伟萍 来源：渔业致富指南 年份：2014 文献类型 ：期刊 关键词： 鄱阳湖生态 生态环境 水利工程建设 淡水生态系统 生态系统服务 水产品总产量 鄱阳湖流域 全球生态系统 生态补偿 五大淡水湖
- 描述：联合国千年生态系统评估指出,1960-2000年,伴随全球人口成倍增长和全球经济的迅速发展,对生态系统服务的需求呈6倍以上的速度增长。同时,近2/3的全球生态系统服务处于退化中。由于人类对水资源的不合理利用,淡水生态系统已经被改变,世界上
- 全文：联合国千年生态系统评估指出,1960-2000年,伴随全球人口成倍增长和全球经济的迅速发展,对生态系统服务的需求呈6倍以上的速度增长。同时,近2/3的全球生态系统服务处于退化中。由于人类对水资源的不合理利用,淡水生态系统已经被改变,世界上
- 鄱阳湖沙区农户对土地利用变化的影响
- 作者： 王盼盼 郑林 曹昀 来源：中国水土保持 年份：2014 文献类型 ：期刊
- 描述：鄱阳湖沙区农户对土地利用变化的影响
- 鄱阳湖生态经济区重点建设
- 作者：暂无 来源：商务时报 年份：2013 文献类型 ：期刊
- 描述：鄱阳湖生态经济区重点建设
- 鄱阳湖五河人湖口浮游藻类及营养现状评价
- 作者： 陈格君 周文斌 胡春华 来源：湖北农业科学 年份：2013 文献类型 ：期刊
- 描述：鄱阳湖五河人湖口浮游藻类及营养现状评价
- 鄱阳湖模型试验大厅高支模设计与施工技术
- 作者： 简鸿福 曾宇军 高雄 李传奇 来源：山西建筑 年份：2013 文献类型 ：期刊 关键词： 监测控制 安装拆除 支撑计算 高支模
- 描述：介绍了在模型大厅17.5 m高山墙弧梁高支模施工过程中,支模材料选用、支撑荷载计算、支架架设、模板安装与拆除等方面的情况,详细阐述了该高支模系统从设计到施工的技术过程,并通过监测分析和结果验证,提出了高支模在施工过程中应该注意的几个关键点,对其他类似工程的施工具有一定的参考意义。
- 全文：介绍了在模型大厅17.5 m高山墙弧梁高支模施工过程中,支模材料选用、支撑荷载计算、支架架设、模板安装与拆除等方面的情况,详细阐述了该高支模系统从设计到施工的技术过程,并通过监测分析和结果验证,提出了高支模在施工过程中应该注意的几个关键点,对其他类似工程的施工具有一定的参考意义。