BOARD00983

• Board Meeting Date: 4/13/1966
• Description: Minutes and Resolution
• Board Meetings - Doc Type: Meeting

5056

r-m; WOOD:

MR. STAPLETON:

HR. WOOD:

"f.tr. Stapleton, I have a brief paper that
would give the 'objectives of the model."

"Whatever you want. I think some of us,
perhaps, don't understand it and if you could
just give briefly, five minutes or so, on what
it is, I think it might be of interest to them
and some of ,the members of our audience."

I

"I'll briefly describe the model. The
electrical-analog model of the Arkansas Valley
was constructed in a shape similar to the
hydrologic system. The model uses electrical
components to duplicate the physical charac-
ter of the valley-fill aquifer, the Arkansas
River, and the boundaries of the system. The
physical character of the aquifer is repre-
sented by resistors and capacitors. Resistors
are used to simulate the transmissibility of
the aquifer (or water conducting ability) and
capacitors are employed to represent storage
capacity of the aquifer. The model, simulat-
ing a ISO-mile reach of the Arkansas Valley
(pueblo to the Kansas line) contains about
100,000 resistors and 10,000 capacitors. The
model is built in four connected panels and
is 48 feet long and 6-1/2 feet high. The
model was constructed on a scale of 4 inch =
1 mile, with junctions at 1/2-inch intervals
(660 feet between junctions).

The purpose of the analog model study is
to evaluate the operation of the hydrologic
system quantitatively so that the effects of
proposed changes in water use can be pre-
dicted. The model is being tested at the
u. S. Geological Survey's computer laboratory
in Phoenix. Much of the testing has been com-
pleted, however, additional calibration and
information is needed to further perfect the I
model. However, it is now a useful computer
and can be used to evaluate problems in the
Arkansas Valley. Some of the valuations that '
will be made by the model are as follows:

1. Quantitative evaluation of the effect