The aim of this study is to investigate the accuracy, error and precision
of some models for providing erosion types map in Jajrood sub-basin, north-east
Tehran, Iran. Seven models were applied for providing working units maps
that four models were prepared by the integration of different data layers.
Other models were photomorphic units map derived from processing satellite
images, land units map and rocks erodibility map. Gully erosion intensity
in 314 spots was investigated to provide the ground truth map. This map
was crossed by the different working units` maps. Results indicated that
the integration of land use, rocks erodibility and land units layers is
a better model than other models of data layers integration from an economic
and executive regards. Accuracy for this model and photomorphic units
map was 89.8 and 89.0%, respectively. The least coefficient of variation
(14.1%), consequently, the highest precision was related to photomorphic
units` map. Land units and rocks erodibility models, because of their
low accuracy and precision, are not suitable for providing gully erosion
map. That is why the best model is photomorphic units map.