WSP01765

• File Number: 8131.600
• Description: Southeastern Colorado Water conservancy District - SECWCD
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 1/1/1972
• Title: Brochure No 7 - Scientific Water Management Arkansas Valley Colorado - 1969-2050 -- The Future of the Arkansas Valley is It's Water---
• Water Supply Pro - Doc Type: Report/Study

Shown above are two of the four panels which
reproduce approximately 125 miles of the Arkansas
River between Pueblo, Colorado, and the Kansas
S101e line. The Model is used by scientists and engi-
neers to relate the relationship of the surface flow to
the ground water basini the relationship of wells to
the surface flow; and wells to each other. Data used
in solving long-range management problems are kept
current by regular systematic re~dings at specific
times each year. The U. S. Geological Survey carries
on intensive studies involving the data used on the
Analog Computer, and solves additional problems by
Digital Computer Programs. There is no limit to the
number of water related programs which can be
analyzed by bath the Analog and Digital Computers,
and suggested management programs ore then devel-
oped to maximize the use of the limited resources
in Southeastern Colorado. The Southeastern Colorado
Water Conservancy District is one of the cooperating
agencies in the program, along with the Colorado
Water Conservation Board, and the U. S. Geological
Survey. Data col/ected for the Analog studies have
been used extensively by members of the Colorado
State legislature, and Courts of law, in evaluating
water rights and use in the affected area.

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EXPLANATION
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Surface-water lupply
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Ground-water withdrawal

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o MA.R. A.PR. MAY JUNE JULY AUG. PT. OCT. NO\! DEC. JAN. FE

This chart describes how the Analog Computer
can be used to provide a recommended program for
the conjunctive use of surface and ground water
through an irrigation season. The crop requiremenh
are very easily established through historical data,
and material furnished from agricultural universities
and colleges. The surface water supply is readily
obtained from climatological reports, historic data on
snow melt, and average annual precipitation. The
ground water can be evaluated based upon the spe-
cific data identifying the amount of water which is
in the underground table at specific times of the year,
and the capabilities of the pumps within the area.
This chart identifies the necessity for Reclamation Pro-
jects, such as the Fryingpan-Arkansas Project, which
will enable decree holders in the lower Valley to
store their water in Pueblo Reservoir until such time
as it can be applied to the land in a more beneficial
manner. Much of this water then finds its way into
the ground water table as recharge, and is available
at a still later date to be pumped out for re-use. The
program offers one of the most complete 'uses of a
limited water supply.

Many Official Papers hove been written on the
application of the Electric-Analog-Model, and the
Digital Computer concept, and much of the material
has been introduced in various Courts of Low
throughout the United States, with legal opinions
rendered by Judges from the District, through the
U. S. Supreme Court. State legislatures and the Con~
gress of the United States have taken advantage of
the Computer Science in drafting water legislation
which will provide for the maximum conjunctive use
of all water sources. Private industry and munici-

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