| 长江三峡水库蓄水运用对洞庭湖水沙特性的影响 |
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| 引用本文： | 李景保,代勇,欧朝敏,彭鹏,邓楚雄.长江三峡水库蓄水运用对洞庭湖水沙特性的影响[J].水土保持学报,2011,25(3):215-219. |
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| 作者姓名： | 李景保 代勇 欧朝敏 彭鹏 邓楚雄 |
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| 作者单位： | 1. 湖南师范大学资源与环境科学学院,湖南长沙,410081
2. 国防科学技术大学信息系统与管理学院,湖南长沙,410073 |
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| 基金项目： | 国家自然科学基金(41071067); 湖南省重点学科自然地理学建设项目 |
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| 摘 要： | 依据实测水沙资料,运用比较分析法,系统分析了长江三峡水库蓄水运用对洞庭湖水沙特性的影响。结果表明:(1)荆江三口分流分沙比由18.5%,21.4%分别减少至11.7%,13.6%,导致三口占入湖总径流量、总输沙量比重,依次由41.5%,82.9%减少至21.6%,58.5%;(2)多年平均入湖水沙量分别减少了531×108 m3,4 715×104 t,湖盆泥沙淤积率由70.4%减少至39.5%,递减幅度为30.9%;(3)西、南、东3洞庭湖多年平均水位变幅分别降低了1.23,1.45,1.88m;(4)湖盆冲刷量大于淤积量,淤积泥沙颗粒趋于细化,西洞庭湖区与东南洞庭湖区的泥沙输出比均呈同步增大趋势。这些水沙特性的变化,对于延长洞庭湖寿命、减轻湖区洪涝灾害风险具有重大意义,同时也会给湖区造成一系列的生态环境问题。
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| 关 键 词： | 三峡水库 蓄水 水沙特性 洞庭湖 |
Effects of Store Water Application of the Three-Gorges Reservoir on Yangtze River on Water and Sediment Characteristics in the Dongting Lake |
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| LI Jing-bao,DAI Yong,OU Chao-min,PENG Peng,DENG Chu-xiong.Effects of Store Water Application of the Three-Gorges Reservoir on Yangtze River on Water and Sediment Characteristics in the Dongting Lake[J].Journal of Soil and Water Conservation,2011,25(3):215-219. |
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| Authors: | LI Jing-bao DAI Yong OU Chao-min PENG Peng DENG Chu-xiong |
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| Institution: | LI Jing-bao1,DAI Yong1,OU Chao-min2,PENG Peng1,DENG Chu-xiong1(1.College of Resource and Environmental Science,Hu'nan Normal University,Changsha,Hunan 410081,2.College of Information System and Management,National University of Defense Technology,Hu'nan 410073) |
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| Abstract: | According to the measured water and sediment data,using comparative analysis,the paper analyzed systematically the effects of store water application of the Three-Gorges reservoir on Yangtze river on water and sediment characteristics in the Dongting lake.The results indicated that:(1)The ratios of split-flow and sediment diversion at the three outfalls of Jingjiang river reduced separately from 18.5%,21.4% to 11.7% and 13.6%,which resulted in that the proportions of runoff and sediment discharge via the th... |
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| Keywords: | the Three-Gorges reservoir store water water and sediment characteristics the Dongting lake |
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