VO supports various climate files in Resource Library.

READ Storm File (*.stm)

This is the storm file used by OTTHYMO-89/INTERHYMO READ STORM command. In VO5, it is used to create a read-in design storm in Resource Library. The file format is described below.
1st line: 2 (1 indicates in/hr, 2 indicates mm/hr)
2nd line: comment line (up to 60 characters in length)
3rd line: 10 (storm time step, min)
4th line: 24 (number of rainfall increments)
5th line: 2.071 (1st rainfall intensity)
6th line: 2.266 (2nd rainfall intensity)
7th line: 2.524 (3rd rainfall intensity)
…th line: …
xth line: 2.135 (xth and last rainfall intensity, x corresponds to the number in the 4 th line)
last line: -1 (indicates the end of the file).

An example of a Storm data file (25mm4hr.stm) is as follows:
2
TWENTY-FIVE MM FOUR HOUR CHICAGO STORM
10
24
2.071
2.266
2.524
2.880
3.382
4.175
5.696
10.777
50.214
13.366
8.286
6.295
5.194
4.466
3.949
3.560
3.252
3.010
2.799
2.622
2.476
2.346
2.233
2.136
-1

MASS STORM File (*.mst)

This is the storm file used by OTTHYMO-89/INTERHYMO MASS STORM command. In VO5, it is used to create a MASS storm in Resource Library. The file format is described below. Note that the ordinate is the fraction of the accumulated rainfall volume to total volume. So it starts from 0 and increases to 1.

1st line: comment line (up to 60 characters in length)
2nd line: 20 (the time increment between each ordinate, min)
3rd line: 13 (the # of ordinates used to describe the mass curve, max.=400)
4th line: 0.00 (the first ordinate of the mass curve)
5th line: 0.01 (the second ordinate of the mass curve)
6th line: 0.04 (the third ordinate of the mass curve)
…th line: …
xth line: 1.00 (xth and last ordinate of the mass curve)
last line: -1 (indicates the end of the file).

An example of a MASS Storm data file (aesmass.mst) is as follows:

AES MASS CURVE DATA WITH TWENTY MINUTE TIME STEP
20
13
0.00
0.01
0.04
0.12
0.27
0.55
0.70
0.82
0.90
0.95
0.98
0.99
1.00
-1

Simple CSV

The simple CSV file is used to import the precipitation, temperature, and evaporation data. Two columns are required for precipitation and evaporation. The daily temperature file has three columns with date time, minimum daily temperature, and maximum daily temperature.

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