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- 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.
- 鄱阳湖水位波动变化及其对洲滩湿地典型植被景观带空间分布的影响
- 作者： 戴雪 来源：中国科学院大学 年份：2015 文献类型 ：学位论文
- 描述：鄱阳湖水位波动变化及其对洲滩湿地典型植被景观带空间分布的影响
- 鄱阳湖水位波动变化及其对洲滩湿地典型植被景观带空间分布的影响
- 作者： 戴雪 来源：中国科学院大学 年份：2015 文献类型 ：学位论文
- 描述：鄱阳湖水位波动变化及其对洲滩湿地典型植被景观带空间分布的影响
- 鄱阳湖水位波动变化及其对洲滩湿地典型植被景观带空间分布的影响
- 作者： 戴雪 来源：中国科学院大学 年份：2015 文献类型 ：学位论文
- 描述：鄱阳湖水位波动变化及其对洲滩湿地典型植被景观带空间分布的影响
- 小波分析在鄱阳湖水位序列多时间尺度分析中的应用
- 作者： 游海林 徐力刚 刘桂林 吴永明 王晓龙 姜加虎 来源：水力发电 年份：2015 文献类型 ：期刊 关键词： 星子站 鄱阳湖 历年年均水位 Morlet小波
- 描述：运用Morlet连续复小波函数分析鄱阳湖星子水文站1953年~2012年历年年均水位变动的多时间尺度演变特征,并在水位变动的小波方差分析结果的基础上运用surfer8.0绘制出控制鄱阳湖历年年均水位演变的主周期趋势图。结果表明,鄱阳湖历年年均水位在不同时间尺度的分辨率条件下,其序列显现出不同的周期交替现象,演变过程中存在着25~32、19~23、8~15年以及3~7年4类时间尺度的周期变化规律;其变动存在3个较为明显的峰值,依次对应着28、22、5年的时间尺度;3类时间尺度具有较明显的局部化特征,前两个时间尺度上,年均水位变动的平均周期为19、15年左右,在5年时间尺度上,历年年均水位变动的频率变化较快,同时振荡行为也较明显。
- 全文：运用Morlet连续复小波函数分析鄱阳湖星子水文站1953年~2012年历年年均水位变动的多时间尺度演变特征,并在水位变动的小波方差分析结果的基础上运用surfer8.0绘制出控制鄱阳湖历年年均水位演变的主周期趋势图。结果表明,鄱阳湖历年年均水位在不同时间尺度的分辨率条件下,其序列显现出不同的周期交替现象,演变过程中存在着25~32、19~23、8~15年以及3~7年4类时间尺度的周期变化规律;其变动存在3个较为明显的峰值,依次对应着28、22、5年的时间尺度;3类时间尺度具有较明显的局部化特征,前两个时间尺度上,年均水位变动的平均周期为19、15年左右,在5年时间尺度上,历年年均水位变动的频率变化较快,同时振荡行为也较明显。