For general information, see the ADCIRC site, ADCIRC FAQ, or the ADCIRC Wikipedia page. For model documentation not yet available on the wiki, see the ADCIRC site. New content is being continuously added to the ADCIRCWiki, and material from the main ADCIRC site will be gradually transitioned over to the wiki.
The fort.25/fort.225/fort.227 file(s) give ADCIRC the ability to incorporate ice fields into the computation of wind drag coefficients. The only influence that these ice fields has on ADCIRC’s solution procedure is that they are used to modify the wind drag coefficients based on wind speed and percentage of ice coverage.