Eric H Feedback - CRWaterAvailabilityScopeDraf

• Title: Water Availability Study of Colorado River and Tributaries
• Date: 6/25/2007
• IBCC - Doc Type: Needs Assessment & Technical Support

2. Perform/Summarize Literature Review of Previous Studies/l1westigations - A
review will be performed of recent studies and investigations related to general
water supply ilwestigations of Colorado River tributaries ~ncluding fromL ~ ~ ~ ~ ~ ~ ~ _ _ -
a. General
i. SWSI
ii. Tree Ring Analysis (i.e. Harding)
iii. CDSS Documentation of StateMod subbasin models.
b. Colorado River Compact
i. CWCB Investigations (including 1995 anlaysis of water available
to Colorado under Compact).
11. Tipton and Kalmbach
111. SCS Basin Studies
IV. USBR Basinwide Planning Reports
v. Upper Colorado River Commission Colorado River Compact
Analyses
Yl. Eric Kulm Analysis
V11. Colorado River and Upper Colorado River Compacts and Mexican
Treaty
V111. Coordinated Long-Range Operating Criteria and Interim Surplus
Guidelines.

3. Prepare a Glossarv of Terms relevant to the Phase I Study. Tlus glossary would
facilitate communications with members of the Roundtables and others involved
in the study. This glossary would include terms such as natural flow. depletions,
subbasin definition. etc.

4. !validation of Current CWCB Modelsl ~,jt!l}~.Qlll!dy!~I~ !l!~l!l~':l~:.. J~o_ ~1~il~t'!t~ ~_
an understanding and acceptance of current water allocation modeling of
Colorado River tributaries by the State. the following activities would be
performed:
a. CWCB will prepare a brief summary (i.e. 10 pages) of the primary
operating criteria. results and calibration for the State modeling
(StateMod) of the current water supply/demand on each Colorado River
Subbasin. These summaries will also include a description of further
enhancements (i.e. inclusion of high altitude crop coefficients) proposed
for the study. Summaries will be prepared for the San Juan. GUllluson,
Colorado River mainstem. White and Yampa subbasins.
b. These summaries will be distributed (along with references to much more
detailed documentation on State web site) to basin roundtable members for
the discussionlYalidation of the State models. Each Roundtable Member
will be requested to review (witlun a three week period) the summary (and
extended documentation of the model if appropriate) for reasonable
operation of the current hydrologic base/demands and offer
suggestions/comments as appropriate.
c. Review Roundtable member suggestions/comments and prepare responses
to each suggestion/comment of the Roundtable members. Distribute the

Colorado River Water A \'ailability Study Scope

4

June 25. 2007 Draft

Comment: The National Academy of
Sciences did a report in Febmary, 2007
"Colorado River Basin \Vater
t.:Ianagernent: Evaluating and Adjusting
to Hydroclimatic Variability."

- Comment: In addition to the
roundtable members, \vater
commissioners \vauld be very valuable in
this validation. Can \ve provide time
and/or resources for DWR to help with
tile feedback tram the roundtable
members? The Division Engineers are
liaisons to each roundtable and could be
helpful in explaining, managing the
feedback, and validating the models.