4. Assumptions. Certain assumptions were made when developing the water consumption estimates.
They are as follows:
a. The water requirements for drinking, personal hygiene, heat casualty treatment, and medical
operations will not be compromised.
b. Only potable water will be available for mission support in an arid environment.
c. Water production will be done with US Army equipment.
d. In times of water shortage or intense combat, all but absolutely essential water consuming
functions will be curtailed.
e. Water sources are accessible and exploitable.
f. Required water distribution support equipment is in place.
g. Rounding of gallon/man/day planning factor computations to the nearest tenth of a gallon
compensates for the 10 percent waste factor used in previous planning guidance.
h. Only back-up support will be provided to other services.
i. Raw water acquired from available sources in hot, tropical, temperate, and cold climatic
environments will normally not require ROWPU processing to meet the minimum quality standards
required for nonpotable water consuming functional mission operations.
5. Theaters of Operation. Two types of theaters used in planning water requirements are the
conventional theater and the integrated theater. The conventional theater is one in which no use of NBC
weapons is anticipated. The integrated theater is one in which one or more opponents have available
NBC weapons and employment is anticipated.
6. Categories of Supply Requirements.
a. Initial Supply Requirements. That amount of water that can be carried by units in TOE,
including any augmentation with CTA items authorized by the appropriate commander.
b. Replacement and Consumption Requirements. The quantity required to replace water that is
consumed or lost as a result of spillage, evaporation, or enemy action. Quantities are usually expressed
in terms of gallons required per day.
c. Reserve Requirements. This is based upon daily resupply data. Days of supply are set by
command policy.
QM5204
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