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I calculated water erosion in ArcSWAT and I also calculated erosion by RUSLE

http://35.8.121.139/rusle/

equation in ArcGIS. Now I need to compare these two (from ArcSWAT I used SYLD- assumed sediment routing in t/ha/y and in rusle erosion also in t/ha/y), I used zonal statistics for rusle, but my results are wrong and I think I am using the wrong instructions on how to do it, does anybody know how can I compare these two?

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What version of ArcGIS are you using? Are you using the Spatial Analyst extension? Are you able to provide links to arcswat and RUSLE which are both terms unfamiliar to me, please? –  PolyGeo May 6 '13 at 21:40
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ArcSWAT is a surface water modeling module/add-in that is part of SWAT. –  Chad Cooper May 6 '13 at 21:55
    
if anybody is interested, now i know how to compare them. ArcSWAT computes also output USLE, which you can directly compare with RUSLE, or to compare SYLD from ArCSWAT(sediment runoff in t/ha/y) with RUSLE also in t/ha/y ( you use subbasins from ArcSWAT to create zonal statistics of RUSLE, parameter: MEAN) and then just to compare :) result supposed to be - erosion calculated by RUSLE is less then ArcSWAT because ArcSWAT also calculates influence of psysical laws of terrain. –  Lucia May 15 '13 at 9:14
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