检索结果相关分组
- 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.
- 淹没对鄱阳湖洲滩灰化苔草化感抑藻的影响
- 作者： 李林 陈峰 赵荣芳 来源：草业科学 年份：2015 文献类型 ：期刊 关键词： 化感 多糖 细胞直径 抑制率 灰化苔草
- 描述：~1.8和1.7~2.0 pg·cell-1,微囊藻胞外多糖的积累形成胞外胶鞘并单细胞形成群体以抵御化感抑藻的胁迫作用。本研究为采用生态调控水位实现植物化感抑藻提供基础试验数据。
- 全文：~1.8和1.7~2.0 pg·cell-1,微囊藻胞外多糖的积累形成胞外胶鞘并单细胞形成群体以抵御化感抑藻的胁迫作用。本研究为采用生态调控水位实现植物化感抑藻提供基础试验数据。
- 基于动态博弈的鄱阳湖生态经济区旅游服务供应链协调机制研究
- 作者： 王娟 来源：南昌大学 年份：2015 文献类型 ：学位论文
- 描述：基于动态博弈的鄱阳湖生态经济区旅游服务供应链协调机制研究
- 鄱阳湖生态经济区产业集群和城市群协同关联研究
- 作者： 李鉴 来源：南昌大学 年份：2015 文献类型 ：学位论文
- 描述：鄱阳湖生态经济区产业集群和城市群协同关联研究
- 鄱阳湖生态经济区农村住宅太阳能适宜性利用研究
- 作者： 陶贵 来源：华东交通大学 年份：2015 文献类型 ：学位论文
- 描述：鄱阳湖生态经济区农村住宅太阳能适宜性利用研究
- 《鄱阳湖生态经济区规划》的英译研究——从目的论视角下分析
- 作者： 叶晓芬 来源：宁波大学 年份：2015 文献类型 ：学位论文
- 描述：《鄱阳湖生态经济区规划》的英译研究——从目的论视角下分析
- 气候变化和人类活动对鄱阳湖流域入湖水沙通量的影响
- 作者： 徐夏楠 来源：南京大学 年份：2015 文献类型 ：学位论文
- 描述：气候变化和人类活动对鄱阳湖流域入湖水沙通量的影响
- 大型通江湖泊水生态系统健康评价--以鄱阳湖为例
- 作者： 张艳会 来源：中国科学院大学 年份：2015 文献类型 ：学位论文
- 描述：大型通江湖泊水生态系统健康评价--以鄱阳湖为例
- 气候变化和人类活动对鄱阳湖流域入湖水沙通量的影响
- 作者： 徐夏楠 来源：南京大学 年份：2015 文献类型 ：学位论文
- 描述：气候变化和人类活动对鄱阳湖流域入湖水沙通量的影响