WSP09405

• File Number: 8149.100
• Description: Miscellaneous Small Projects and Project Studies - NRCS-Ft Lyon Canal Co Limestone Graveyard Creeks
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 6/2/1993
• Author: Gronning Engineering
• Title: Ft Lyon Canal Company Water Transfer Alternatives Study Appendix of Phase 1 Report
• Water Supply Pro - Doc Type: Report/Study

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2776
Table A3.5 - Breakout of Average Water Consumption and Return Flow Fort Lyon Direct Flow System
(Helton and Williamsen, PC 1993)

Item

Consumed

Returned
To River

DELIVERY TO THE FARMS

11,862

Total farm loss (26.323%)

3,123

CROP CONSUMPTIVE USE AND SOIL EVAP

8,740

o

8,740

TOTAL (acre-feet):
(percent) :

24,768
78.33

6,854
21.67

All values are averages for the period of compact years 1950-85 as reflected in the
Colorado Water Budget and supporting documentation.
2) The return flow from recharge to the various aquifers was calculated on an aquifer-
wide basis, using the percentages that the stream accretion from valley fill-stream
flux, valley fill-drain flux, and channel outflow were of the total aquifer discharge
from the valley fill-stream flux, valley fill.drain flux, channel outflow, and
subirrigation. This approach recognizes historical levels of well pumping and
phreatophyte consumption in the aquifers, but does not focus on the specific parts
of the aquifers that were affected by the Fort Lyon.
3) The releases from the Fort Lyon storage reservoirs were adjusted by reducing the
actual releases for an average drawdown of 187 acre-feet per year during the
analysis period.

Notes: 1 )

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Helton & Williamsen, P.C. - Consulting .Engineers in Water Resources

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