Establishing vivid three - dimensional topograph based on autocad platform 平台构建逼真的三维地形
2.
Because change of volume reflected eroding process of watershed and surface change reflected change of topography surface , this model described relationship between watershed topograph and erosion 由于相对体积变化反映了流域遭受侵蚀的过程，而表面积变化体现的是地形表面的变化，因而此关系模型同时表述了流域地形与侵蚀之间的关系。
3.
Iv ) as a quantitative index of wateshed topography , topograph fractal demension can represent surface shape information of watershed topography in the round . reseach find that watershed model and actual watershed show good fractal character 通过研究发现：流域模型和实际流域地形都具有很好的分形特性，地形分形维数与流域地貌的发育过程有关，代表着流域的发育程度。
