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.
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The test case is the so-called serial quarter annular problem. It is described in some detail here: . The ADCIRC grid is only 63 nodes (triangle vertices) and 96 elements. It looks like this:
Get the test case, if you have not already done so. The serial case is here:  Unzip/untar the downloaded file. It will expand into a directory called "serial_quarter_annular_v51_52_20/". Go there and uncompress the contents.
There are 16 files in this directory. The fort.14 and fort.15 files are input files. The rest are output by ADCIRC and contain various parts of the solution.