Preparation of Geomorphology map for determining of facieses sediment yield by use of GIS

Nowadays, geomorphology studies are base of renewable natural resources scrutiny. In this study, tried to obtain a base map as homogenous unit by geomorphology map for uniform studies and avoid sporadic works. For obtaining of Nehbandan geomorphology map in south Khorasan province with 42 km2 area, geology maps of mentioned place with scale of 1/100000, topography maps with scale of 1/50000 and aerial photos with scale of 1/20000 used. After that, field survey done for completing the study steps. In this study by use of GIS technology, topography maps incorporated with geology map, then by incorporation of this map with erosion facies map in GIS program, Geomorphology map obtained. The location include two units of mountain (3 types) and hill (6types) and totally 10 facieses. Finally, rivers bed alluvium facies(Qal) had the highest sediment yield and rock exposure (M.da3) 50%-75% had the least sediment yield.

geomorphology map, facies, homogenous unit, GIS