Taking Qinzhuanggou Watershed in the dry upland to the north of the Weihe River for an example

terrain factor data and land use data were overlaid and extracted based on the map of the terrain

with the support of ArcGIS software. The relationship between land use distribution and terrain factors was studied by land distribution index. Results showed that there is a close relationship between spatial distribution of land types and the terrain data of elevation

gradient and gully density. The predominant area of farmland are 900~1100 m above sea level

5°~25° slope and 0~4 km/km2 gully density; the predominant area of garden plot

800~1200 m above sea level

0°~15° slope and 0~2 and 4~6 km/km2 gully density; the predominant area of woodland

1100~1250 m above sea level

15° ~25° and >25° slope and 2~6 km/km2 gully density; the advantages of bare land

800~1000 and 1100~1200 m above sea level

>25° slope and 4~8 km/km2 gully density; and the predominant area of rural residential land use

900~1000 m above sea level

0°~5° slope and 0~2 km/km2 gully density.