3.3.4 C-factor layer
Land cover of the areas was compiled from 1:50,000 satellite data acquired in 1990, 2001 and 2007 and mapped at the 1:50,000 scale. The maps were digitally encoded in GIS database. The land cover classes include dry evergreen forest, dry deciduous forest, Mixed deciduous forest, plantation, grass land, paddy field, field crop, community area and water body. To establish the C-factor layer, the value for each class of the land cover was assigned as identified by LDD (LDD, 2000).