The topography of Gaolan County belongs to the hilly and gully region of the Loess Plateau, mostly loess ridges, gullies and Nana Ogawa Plateau. The terrain is high in the north and low in the south, high in the west and low in the east, and inclines from northwest to southeast. The mountains are mostly north-south, with an altitude of1.459.2m to 2445.2m, with a relative height difference of 986m. * * * * There are 4,977 large and small sand and gravel gullies with a total length of 6,743.7 kilometers, which is the birthplace of erosion gullies caused by soil erosion in this county, and the gully density is 2.64 kilometers per square kilometer.
Kongtong area belongs to the hilly and gully region of Longdong Loess Plateau, with high mountains in the northwest, rolling hills in the southeast and dense valleys in the middle, with an average elevation of1540m.