1. The topography of the river's basin has changed significantly since the floods. 洪水过后，这条河的流域地形已经明显改变了。
2. Precipitation is influenced by topography among other things. 除其他因素外，降水还受到地形的影响。
3. The water table is not flat but usually follows the contours of the topography. 地下水位是不平坦的，而是通常随地势而变化。
4. So it rises even faster because it has nowhere else to go, that's where topography comes into the picture. 所以它上升得更快，因为它无处可去，这就是地形的作用。
5. What I am really confused about is how the topography of the land, the mountains and valleys and stuff, affects precipitation. 真正使我困惑的是地形、山脉和山谷之类的因素是如何影响降水的。
