WSPC03144

• File Number: 8283.200
• Description: Colorado River Basin-Colorado River Computer Models-Colorado River Decision Support System
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/12/1996
• Title: Boyle IIIa WRP Enhancement-Phase IIIa Scope of Services-Tasks 1-11-Draft
• Water Supply Pro - Doc Type: Operating Principles/Plan

Approach:
1. STATE: In an interactive ARCVIEW session with RTIWR based on the ARCVIEW project
created in Subtask 2,02, group acreage together by drawing a polygon on the screen after
considering the following:
. baseflow hydrology (primary factor)
. spatial proximity
. Endangered Species instream flow reaches
. existing structures modeled
. new tributaries
. critical administrative reaches
. return flows I
. aggregated irrigat area not to exceed 1000 acres
As a Dolvl!:on is dgw6;" assign names and ids consistent with established naming conventions
(((AGG Trib-wD]:io the aggregations nodes and structures. Use ARCVIEW commands to
prepare an export table of the wdids and associated acreage in the polygon and output to a
f1le with the name of the aggregated group, Generate statistics on acreage included in the
polygon.

11
1--5
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2.

3.

4.

5.

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"13

Locate nodes representing the aggregated structures within the river network, It is
anticipated at no<ies representing aggregated irrigation structures will be inserted just
below' 5-1>aseflow nodes and that 5 additiollal nodes may be needed to maintain an
essential level of resolution in simulating irrigation use.

7

.

This process would be repeated with additional aggregations until all aggregated groups are
defined (or redefined).

RTIGlS: In ARCVlEW cleanup the aggregated boundary layer by placing different shading (
in each aggregated group. Print a 24 by 36 copy of the map. 1/Itl.P
RTIWlt Using a spreadsheet, import the aggregation lists of wdids and acreage and report /0 ifi ^ CA >,"\
on (any w~o1'n1ian one aggrega(~1!: grou!D Provide a summary of wdids in more"
than one aggregation group to the State.
STATE: Document the physical aggregation process in a draft 1-2 page memorandum, RTI
will review this memo and provide written comments to the State. This draft memo will
also be provided to the Division Engineer for his review and comments, State will resolve
comments to memo.
STATE: Finalize memo.

DeIiverables:
1. Groupings of aggregated acreage and associated files of wdid and acreages within each /
grouping. Boundaries will be drawn-on ARCVIEW project prepared in previous sUbtask,9'
2. Map of White River Basin with layers from previous subtask and aggregation boundaries.
3. Report of any wdids which exist in more than one aggregated grouping,
4. Draft memo of aggregation process and outcomes, Provided to RTI and Division Engineer
for comments.
5. Final memo.

Phase IlIa Scope of Services

A-12

June 12. 1996