一、地形本區之南、东、西三面分佈着北洋河之蛇曲狀支流,河床平坦,水流緩慢,冲積層廣濶,两岸山地,經长時间的浸蚀,除鑛床露头因岩性較硬,形成壁立的形状外,一般傾斜均較弛緩,山稜圓秃,冲積谷亦寬、河谷呈樹枝狀,且甚发達,显著的說明已步入了壯年末期。 I. Topography The snake-like tributaries of the Beiyanghe River are distributed on the three sides of the south, east and west of the area. The riverbed is flat, the water flow is slow, the alluvial layer is wide and the mountains on both sides are eroded for a long time. It is hard to form a wall standing shape, the general slope are more relaxed, mountain ridge bald, alluvial valley is also wide, the valley was dendritic, and very developed, a significant indication has entered the middle of the prime of life.