Effects of Store Water Application of the Three-Gorges Reservoir on Yangtze River on Water and Sediment Characteristics in the Dongting Lake

LI Jing-bao; DAI Yong; OU Chao-min; PENG Peng; DENG Chu-xiong

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Effects of Store Water Application of the Three-Gorges Reservoir on Yangtze River on Water and Sediment Characteristics in the Dongting Lake

更新时间：2024-11-07

- Effects of Store Water Application of the Three-Gorges Reservoir on Yangtze River on Water and Sediment Characteristics in the Dongting Lake
- Vol. 25, Issue 3, (2011)
- 作者机构：
  
  湖南师范大学资源与环境科学学院,湖南长沙,4100812. 国防科学技术大学信息系统与管理学院,湖南,长沙,410073
- 作者简介：
- 基金信息：
- DOI：
  CLC： S157.1
- Published：2011
- 稿件说明：
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LI Jing-bao, DAI Yong, OU Chao-min, et al. Effects of Store Water Application of the Three-Gorges Reservoir on Yangtze River on Water and Sediment Characteristics in the Dongting Lake[J]. 2011, 25(3).
DOI：

LI Jing-bao, DAI Yong, OU Chao-min, et al. Effects of Store Water Application of the Three-Gorges Reservoir on Yangtze River on Water and Sediment Characteristics in the Dongting Lake[J]. 2011, 25(3). DOI：

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。

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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