| 摘要: |
| 历史时期,太湖是不断扩展的,其平均扩展速率为0.37km2/a。据沙量平衡分析与计算表明。因湖岸崩塌和太湖水系的输沙作用,近期太湖的泥沙淤积量为9.28×105t/a.泥沙数量虽然不大,但经过长期的积累,对太湖演变具有深刻影响。就自然演变趋势而言,近期太湖面积仍以0.168km2/a的速率扩大,容积则以3.95×105m3/a的速率减小,太湖正进-步向浅平方向演变。然而,因围湖造田,建国以来,太湖的面积则以4.58km2/a的速率在减小。 |
| 关键词: 太湖 湖岸崩塌 泥沙 演变 |
| DOI：10.18307/1992.0308 |
| 分类号: |
| 基金项目: |
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| The sediments and evolution of Taihu Lake |
|
Wu Xiaogen
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Gao & Ocean Scinces Department, Nanjing University State Pilot Laboratory of Coastal & Island Exploitation, Nanjing University, Nanjing 210008
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| Abstract: |
| In historical period fTaihu Lake expanded constantly at a rate of 0.37km/a.According to the analysis and calculation of sediment transportation balance t there are about 9.28×105t of sediments which are transported into Taihu Lake annually from the collapse of lake bank and the different sediment transportations between upstreams and downstreams of Taihu Lake river system.Even though the amount of sediments accumulated in Taihu Lake annually was relatively small,yet,in a long term,it had profound impacts on the evolution of Taihu Lake.At present,the evolution trend of Taihu Lake in nature is that it expands at a rate of 0.168km2/a in area and reduces at a rate of 3.95×105m3/a in volume.Taihu Lake is getting more and more shallow and flat.However,Taihu Lake has been reducing at a rate of 4.58km2/a in area since 1949 because of reclamation of land from the lake. |
| Key words: Taihu Lake collapse of lake bank sediment evolution |
