PROJ00259

• Contract/PO #: C153424
• Contractor Name: Colorado River Water Conservation District
• Water District: 0
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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F. Operation of Alternative Project Confi~urations

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The many possible project configurations were examined through
project operation studies which simulate the operation and administra-
tion of a specified project. Each operation study or simulation or
"run" represents 35 years of monthly operation. Each simulation is
the computation of the amount of water distributed to each canal. each
reservoir and each group of irrigation water users according to an
established set of rules. These operating rules are consistent with
the existing water rights system. with hydrologic principles and with
assumptions made about the operation of a consolidated irrigation
system incorporating new storage and additional canals.

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The operation studies began with the simulation of the existing
system. This is the simulation of operations with the existing canals
operating to serve existing lands in Scenario A and then expanded to
include new lands which might be served in Scenarios B, C and O.
These base simulations show an irrigation water shortage which can be
used as the basis for measuring the benefits of proposed project
features. The shortages presented below are the average annual amount
of irrigation water needed but not delivered. for selected project
configurations.

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Project Configuration

Service Area
(Acres)

System
Basic Shortage
(Ac-Ft/Yr)

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Al
A2
Bl
B2
C1
C2
01
02

9.150
9,150
15,750
17.700
15,750
17,700
16,150
18,100

14.352
14,352
30.003
33.420
30.003
33.420
30.541
33.958

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Subsequent operation studies included various reservoirs and
canals of different sizes and in different combinations. The average
annual shortages resulting from these studies are less than those of
the base run. The amount by which the shortage is reduced over that
observed for the base run is the benefit or yield generated by that
project configuration. This yield is the basis for evaluating the
effectiveness of various project features and configurations.

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