IOWA

This directory contains an installation file that can be used to install the CENTURY files used by U.S. Geological Survey (U.S.G.S.) investigators to study soil carbon in Iowa hillslopes. This study is a part of the Mississippi Basin Carbon Project (MBCP), which in turn is part of the U.S.G.S. Carbon Cycle Research Program.

More information regarding USGS research on the carbon cycle can be found at http://geochange.er.usgs.gov/pub/info/ccresearch.shtml. Details regarding how Century was parameterized for these Iowa runs can be found in the USGS Open File Report 00-508 (Manies et al. 2000). This report can be downloaded at http://geopubs.wr.usgs.gov/open-file/of00-508/.

The install utility will copy a full set of the files used into a directory. It must be downloaded using binary transfer. To run the install program double-click on the centiowa.exe filename in Windows Explorer or use the Run option on the Start menu (select the Browse button to locate the centiowa.exe file that you have downloaded). All files used for this project will be installed on your computer. These files are separated into two folders: one for the agricultural site (Treynor) and one for the control site (Dinesen). Each folder has the appropriate version of the CENTURY program. This version of CENTURY must be run under Windows 95 or Windows 98. The following files will be in each folder:

century.exe The version of the CENTURY executable used for this project

event100.exe The version of the event scheduler executable used for this project

list100.exe The version of the executable that converts binary to ASCII output

Iowa.wth The weather file used for both Treynor and Dinesen runs

dineno.sch/treyno.sch The schedule file used for the no erosion scenario. Different schedule files are used for the Treynor (treyno.sch) versus Dinesen Prairie (dineno.sch) runs. Each site's file can be found in the appropriate folder.

dinemin.sch/treymin.sch The schedule file used for the minimum erosion scenario. Different schedule files are used for the Treynor (treyno.sch) versus Dinesen Prairie (dineno.sch) runs. Each site's file can be found in the appropriate folder.

dinemax.sch/treymax.sch The schedule file used for the maximum erosion scenario. Different schedule files are used for the Treynor (treyno.sch) versus Dinesen Prairie (dineno.sch) runs. Each site's file can be found in the appropriate folder.

.100 files These are the files that parameterize the effects of different crops, cultivation, etc. for CENTURY. Four of these files give site-specific parameters for the two locations being modeled. Two of these files, dinesen.100 and treynor.100, are labeled such that the name represents the site for which the file is to be used. The fix.100 files are also site specific. However, for CENTURY to run properly this file name needs to remain 'fix.100.' Therefore, there are files called fix.100 in both the Treynor and Dinesen folders. These files, though named similarly, contain different information. Therefore, be careful not to use the fix.100 file for one site when doing a run for the other site. Please also note that parameters within other .100 files (e.g., cult.100) may have been changed from the default values, so it is important to use the copies provided.

.def files These files define the different parameters within each .100 file. They are not necessary to run CENTURY, but are needed to run file100.exe

This information was last updated on February 15, 2001.

 

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