WMOD00301 ‎(2)‎

• Title: Conceptual Plan to Develop Water Augmentation by Weather Modification in the Colorado River
• Date: 5/14/1979
• Weather Modification - Doc Type: Report

ORA F T

..,

is, therefore, essential that the statistical techniques employed
include multivariate techniques.

The measurement of precipitation and its subsequent evaluation will
be made using data from precipitation gages and/or seasonal streamflow.
The careful use of gages allows the recording and subsequent analysis
of precipitation over periods as short as 15 minutes and amounts as
sma~l as 0.01 inch. Seasonal streamflow provides an integrated
measurement of the total precipitation over a watershed for the
ent ~ire season. It has been suggested by More l-Seytoux lY, and
Elli'ott, et ale 32/, that a 5- to 7-percent increase in precipitation
results in a 10-percent increase in runoff from mountain watersheds.

It

Physical analysis or evaluation is the second major area important to
the overall evaluation of the program. These analyses can provide a
number of important contributions to the experiment. They can
provide a complete picture of the processes involved in the formation
of prec ip it at ion. In add it ion, covari ates or strat ificat ion parameters
can be identified which, because they can he highly correlated with
other measurements such as precipitation, can reduce the experimental
variance and consequently the time to achieve statistically significant
results. Finally, physical analyses can detect actual deviations
from hypothesized physical mechanisms so that the hypothesis under
which the experiment is being conducted can be changed to reflect the
actual conditions.

.,

47