| 摘要: |
| 本文在地形坐标下引入一种水平导数差分近似方法,建立一个适合日本琵琶湖复杂地形、满足静力平衡条件的三维非定常大气边界层数值模式。在弱的背景风场下,模式加入了琵琶湖流域的实际地形,计算结果表明:模式运行十分稳定,且占机内存小,节省计算时间,同时模式还做了流域地形、湖泊本身存在与否等因子对边界层风场影响的数值试验。在强的背景风场下,模式加入了经过适当平滑的琵琶湖流域地形,得出了一些有益的看法。 |
| 关键词: 琵琶湖 边界层 数值模拟 |
| DOI：10.18307/1994.0201 |
| 分类号: |
| 基金项目: |
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| A three-dimensional boundary-layer model in Lake Biwa watershed |
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Zhang Limin, Pu Peimin
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Nanjing Institute of Geogrophy and Lunnology, Chinese Acodemy of Sciences, Nanjing 210008
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| Abstract: |
| A three-dimensional time-integrated bound ary-laryer model is designed to be applied fur Lake Biwa complex terrain, and an improved finite difference scheme procedure fur approximating horizontal derivatives in a terrain-following coordinate system is introduced.Under weak large-scale wind field,the authors add real Lake Biwa terrain to the model and the results show that the mudel computation is very stable and saves computing time.Meanwhile, some numerical experiments are made with giving consideration to such different factors as watershed terrain,the existence of lake, etc.Under strong large-scale wind field, the authors add smooth terrain of Lake Biwa to this model, and the results obtained are satisfactory. |
| Key words: Lake Biwa boundary-layer numerical simulation |
