A new dispersion model is developed by adoption of assumption for cross-wind dispersion in VALLEY model, but the treatment of terrain influence is changed.

本文采纳VALLEY模式的横向扩散假设，但改变其地形修正方案，构成一个新的山区扩散模式并应用于山区城市渡口市。

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By using these two methods, hidden surfaces are removed effectively. After shading treatment 3-d terrain pictures reflecting the real situation and remote sensing images are obtained.

这两种方法都能有效地进行隐面消除，并通过明暗处理获得了真实感较强的立体地形图和三维遥感图。

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It doesn't hurt that the rooms have central air-conditioning, and you can always retreat to the spa, which offers two treatment areas overlooking the wild, sandy terrain.

FORBES: Bushmans Kloof: Mysterious art from ancient hands.