PUB00128

• Year: 1986
• Title: Rio Grande Water Supply Study Phase I Plan of Study
• CWCB Section: Interstate & Federal
• Author: Leonard Rice Consulting Water Engineers, Inc.
• Description: A plan submitted to the San Luis Valley Water Conservancy District by the CWCB
• Publications - Doc Type: Tech Report

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Task No.6

STORABLE FLOW ANALYSES

T ask E 1 em e n t No: 6 b (c 0 n t )

Generation of modeling input data
unique to the Rio Grande Basin.

2. Up to two scenarios of Compact obl igations will be
imposed in the model ing.
3. Up to three scenarios of future irrigation demands
in the basin will be imposed as follows:
a. Historical diversion levels of the irrigation
systems.
b. A diversion level for the irrigation systems
derived by limiting the historic diversions
to a function of the estimated historic
consumptive use (perhaps reflecting a 50
percent ditch efficiency).
c. A diversion level for the irrigation systems
derived by limiting the historic diversions
to a function of the estimated historic
consumptive use (perhaps reflecting a 30
percent ditch efficiency).

Estimates will be required of historic consumptive use
under the major irrigation rights to be model ed and a
pattern of return flows to the river. If previous
estimates of consumptive use are not avai1able, then
estimates will be derived uSing the Blaney-Criddle
method. It is anticipated that estimates of ditch
system crop acreages will be available fromadata base
prepared by the State Engineer's Office.//Estimates of
consumptive use and return flow patterns will be refined
through the calibration phase of Task 6c.

Work Product: Generated modeling input data unique to
determinations of Rio Grande storable flows.

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~ Leonard Rice Consulting Waler Engineers, Inc.