Cherry Creek Valley CIRCE Final Report

• Project Type: Ag/Muni Grant
• Contract/PO #: C153621
• Applicant: Cherry Creek Valley Water & Sanitation District
• Project Name: CIRCE - Colorado Integrated Resource Conservation & Economic Model
• Title: Colorado Integrated Resource Conservation & Economic Model
• Date: 3/1/1994
• County: Arapahoe
• Water Conservation - Doc Type: Final Report

CIRCE Operator's Manual
March 1994
6

Water Sources Module (WATSRCEl

The Water Sources Module contains user supplied information on the
monthly divertable and storable yields of the existing and proposed
water supplies for the system along with information on system raw
water storage. This information is made available to and used by
the Water Systems Operations Module. Water supply information
should be aggregated and simplified to as great an extent as
possible. WATSRCE contains a scheduling table which allows the
user to specify either demands or years at which water from each
source is to be made available to the system.

Water Svstems Operations Module (WATSYS)

The WATSYS Module performs the monthly operation of the water
system. Demands are met from the water supplies which the users
selects from those contained in the WATSRCE Module. By selecting
or eliminating individual sources the user may readily determine
the impacts of each, on system performance. Excess surface water
is stored in reservoirs, if available, and groundwater is used to
make up shortages after the availabie surface water is used. If
shortages still remain after the. groundwater supplies are
exhausted, then releases are made from storage. Any unmet demands
are tabulated as shortages. Graphs are provided of demands, end of
month reservoir contents, shortages, and demands vs. supplies.
Both monthly and annual summaries are given for each graph.

Capital Cost Module (CAPMODl

Information on the capital costs of existing and proposed water
proj ects is contained in CAPMOD. This module schedules proj ect
spending so that all planning and construction .is completed, and
the project is on line when the specified demand or year is
reached. The output of CAPMOD is a table of capital expenditures
required to implement those projects used by the water system
during the study period.

capital projects may include structural alternatives such as dams,
water treatment plants, water right acquisitions, reservoirs, etc,
or may include capital costs for conservation or non-potable water
system options. All supply options are handled in the same manner.

Because CAPMOD schedules demands sensitive projects to come on line
as the target demands are reached, any demand reductions brought
about by conservation programs will automatically delay or
eliminate capital expenditures which otherwise would be required.
The information on required capital spending is passed over to the
financial module for further analysis.