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Easy-to-Use Analysis Software
Two
fully interactive versions of the water budget that estimate monthly
potential and actual evapotranspiration, directly from C. W. Thornthwaite and
J. R. Mather, 1957. The Water Balance, Publications
in Climatology, Vol. X, No. 3, Drexel Institute of Technology, Centerton, NJ.
This is easy-to-use software that calculates potential
and predicted evapotranspiration (and runoff) based on mean monthly temperature,
precipitation, and latitude works in any DOS environment (DOS-Prompt
in WINDOWS 98/2000). The
program's algorithms are created from and conform to Thornthwaite
and Mather's original tables as revised in 1957.
Full reference is in the accompanying brochure,
which also contains theory, operations, limitations, demonstration
data, and sample output. The
program is supplied on a 3-1/2” floppy disk or, if specified (by
email) on a CD.
Each version:
- Requires
mean or actual monthly temperature, precipitation and, if desired,
runoff;
- Provides screen or print options;
- Produces mean annual tabular water budget organized by
months, climatogram, and comparison of predicted and actual runoff, if
entered;
- Functions in a DOS or WINDOWS 9x environment, and;
- Comes mailed
postage paid on a 3-1/2" disk (or CD) with a four page explanatory
brochure.
- "Revisiting the Thornthwaite and Mather Water Balance." The Thornthwaite and Mather method of calculating the monthly pattern of annual the water balance has been criticized, but is also misunderstood. Download a free copy of a recent paper published in the Journal of the American Water Resources Association to set the record straight. Click here
LATE NOTES: Both editions now operate in WINDOWS XP Professional (as well as WINDOWS 97 or 98). You can also re-start your computer in DOS MODE, entering the subdirectory where the
software is located and entering the word SOLVE.
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It is easiest to right click on the SOLVE.EXE file and send an icon to the desktop. Then, whenever you wish to start the software, click on the icon. Remember to exit the SOLVE software with the F4 key and a "Y" (as instructed).
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The software also operates
in any DOS environment (on 286, 386, or 486 PCs) or, in WINDOWS 9x,
where you can use PRINT SCREEN or screen capture software to store the printed output
as a file that can then be pasted into a WORD document, for example, which also enables making use of
the software's color graphics).
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