| 张发兵,胡维平,秦伯强.湖底地形对风生流场影响的数值研究[J].水利学报,2004,35(12):0034-0038 |
| 湖底地形对风生流场影响的数值研究 |
| Numerical analysis on influence of topography on wind-driven current in lake |
| 投稿时间：2003-09-08 |
| DOI： |
| 中文关键词: 湖泊 地形 风生流场 流场 |
| 英文关键词: lake topography of lake bottom wind-driven current flow field |
| 基金项目:中国科学院知识创新工程项目(KZCX2-31)、国家自然科学基金(40271100) |
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| 中文摘要: |
| 本文利用三维水动力学模型，对定常风条件下，几种典型湖底地形浅水湖泊的风生流场进行了数值模拟，比较了几种典型地形的风生流的垂向平均流场与各分层流场的差异。结果表明：在风场等外部条件相同的情况下，湖底地形将决定湖泊风生流场的基本形态和环流流速，碟形底和斜形底的湖泊所形成的垂向平均流场有明显差异。湖底地形的变化对稳定状态的湖泊次表层、中间层和次底层流场有较大影响，而对表层流场影响不大。湖中有无岛屿将形成截然不同的两种风生流场。 |
| 英文摘要: |
| The wind-driven current in lakes with various types of bottom under the action of stationary wind is numerically analyzed by using 3-D hydrodynamic model. In the model the σ-coordinate system is adopted. The comparison of the vertical average current field and flow field at different levels for several typical bottom shows that the flow pattern and circulation velocity of wind-driven current are dependent on the shape of lake bottom. The shape of lake bottom significantly affects the flow field at different levels except for the surface flow. The island in lake will greatly change the flow field of wind-driven current. |
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