三江平原低山丘陵小流域主要自然地理过程对水土资源的影响

冻融作用和流水作用是新丰沟小流域中最明显的自然地理过程。在古今冰缘地貌过程和现代流水过程的作用下，新丰沟小流域形成耻有长大坡积裙的宽平谷地。地形的垂直分化，导致了局地气候、水文条件及土壤类型的相应分化，从而形成了具有不同生产潜力和不同利用方向的土地类型。

On the Main Physical Geographic Processes and Their Influence on Water and Land Resources within the Small Watershed in the Hills and Mountains Area of the Sanjiang Plain

The main physical geographical processes are freeze-thaw action and fluviation at the small watershed of the Xinfenggou village. Through the periglacial geomorphic process and the fluviation, a wide flat with long slope wash was formed at the bottom of the watershed. The altitudinal differentiation of landform leads to differences of local climate and hydrological condition, Therefore, land types can be used to present pertental productivity of land resources.