One of the initial challenges that you can encounter as a novice SWAT user who wants to use CORINE Land Use/Land Cover (LULC) maps is converting the LULC to SWAT LULC:
Here is how I addressed this problem in my first SWAT project, which is on a 150-km2 watershed located in northwestern Turkey:
Corine2006 Code/Description: SWAT:
121/Industrial or commercial units UCOM
122/Road and rail networks and associated land UTRN
243/Land principally occupied by agriculture with significant areas of natural vegetation AGRL
231/Pastures PAST
324/Transitional woodland scrub RNGB
242(1)*/Complex cultivation patterns AGRL
311/Broad-leaved forest FRSD
312/Coniferous forest FRSE
212(1)*/Permanently irrigated land AGRL
313/Mixed forest FRST
321/Natural grassland RNGE
112(2)*/Discontinuous urban fabric URLD
211(1)*/Non-irrigated arable land AGRC
512/Water bodies WATR
411/Inland marshes WETN
(*): Typical CORINE2006 LULC codes are three-digit. Some of the CORINE2006 codes in the map provided to me by my fellow researchers contained four digits. So, you can disregard the last digit given in parentheses.
You can download the small .txt that I wrote for my ArcSWAT (version 2012.10.1.15 released on 6/20/14) project from here. You can edit this file as you please and use it in your ArcSWAT project.
Please check out the following references, which helped me quite a bit during my own conversion process:
1. http://www.eea.europa.eu/publications/COR0-landcover
2. http://ec.europa.eu/agriculture/publi/landscape/about.htm
3. http://www.eea.europa.eu/data-and-maps/data/corine-land-cover-2006-raster-2/corine-land-cover-classes-and/clc_legend.csv
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