WSPC01326

• 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: 8/8/1997
• Title: Bethel Contracts and POs-CRDSS Task Orders-August 1997-June 1999
• Water Supply Pro - Doc Type: Operating Principles/Plan

Table 2 calculation notes by column nwnber:
(I) ., Ana1yfuexpected to be performed for irrigation years (November through October) 1975 through 1996, contingent on placement of 1992-1996
data into CRDSS ditch diversion data into CRDSS database outside of this scope,
(3) lnigation Water Requirement (at the crop) calculalt:d based on the Blaney-Criddle method, crop parameters and climate parameters assigned
to the ConntylHuc area in which the structure resides,
(4), (5),(6),(7) Hi&aic diversions l}pically obtained from State's diversion records, May be filled by user prior to this anlaysis. Summarized for
rights senior to admin cutoff date (Column 4), junior to admin cutoffdate(colwnn 5), exceeds water right decrees (column 6), and
a total (column 7).
((8) Portion of diversions sho\\11 in Colwnns 4 directed to crop conswnptive use in the associated time period,
Minimwn of (Column (4). maximwn inigation efficiency (g)) or Column (3)
(9) Portion of the junior priority diversion in (5) which is directed to crop conswnptive use in the associated time period,
Minimum of (Column (5). maximwn inigation efficiency (g)) or (Column (3) - Column (8))
(10) Portion of the other diversion in (6) which is directed to crop conswnptive use in the associated time period,
Minimwn of (Column (6) . maximwn inigation efficiency (g)) or (Column (3) - Column (8)-<:olumn (9))
(II) Diversions which went directly to CU.
Sum ofColwnns (8), (9) and (10).
(12) Portion of river diversion attributed to senior water rights that went to recharge of soil moisture
Minimwn of Column (4).maximwn irrigation efficiency (g}-Column (8)) or remaining capacity in soil moisture (not shown on
worksheet).
(13) Portion of river diversion attributed to junior water rights that went to recharge of soil moisture
Minimwn of Column (5).maximwn irrigation efficiency (g}-Column (9)) or remaining capacity in soil moisture (not shown on
worksheet),
(14) Portion of river diversion attributed to other diversions that went to recharge of soil moisture
Minimwn of Column (6).maximwn irrigatiou efficiency (g}-Column (10)) or remaining capacity in soil moisture (not shown on
worksheet),
(15) Total river diversion distributed to recharge of soil moisture
Minimwn of Column (7).maximwn irrigation efficiency (g}-Column (II)) orremaining capacity in soil moisture (not sho\\11 on
worksheet).
(16) Portion of river diversion attributed to senior water rights which is directed to return flows, No delay factors have been applied to these
values.
Column (4) - Column (8) - Column (12)
(17) Portion of river diversion attributed to junior water rights which is directed to return flows, No delay factors have been applied to these
values.
Column (5) - Column (9) - Column (13)
(18) Portion of river diversion attributed to other diversions which is directed to return flows. No delay factors have been applied to these values.
Column (6) - Column (10) - Column (14)
(19) Portion of river diversion directed to return flows. No delay factors have been applied to these values,
Column (7) - Column (11) - Column (IS)
(20) Total river diversion attributed to water rights that went to CU or soil moisture recharge,
Column (II) + Column (IS)
(21) Calculated irrigation system efficiency of use of river diversion (water removed from stream system - current or future cu associated with
diversions)
Column (20) !(Column (7)
(22) Estimated EOM contents for soil moisture reservoir associated with senior water rights.
Previous com contents plus column (12) - withdrawal not shown by right
(23) Estimated EOM contents for soil moisture reservoir associated with junior water rights,
Previous com contents plus column (12) - withdrawal not shown by right.
(24) Estimated EOM contents for soil moisture reservoir associated with other diversions
Previous com contents plus column (12) - withdrawal not shown by right.
(25) Total EOM contents for soil moisture reservoir
. Colwnns 22+23+24
(26) Repeat of column II.
(27) Water used from soil moisture reservoir, Note: water used is assumed to come from water right accounts in proportion to water in those
accounts.
(28) Water conswnptively used by crops attributed to senior water rights,
Column 8 plus water use from soil moisture reservoir attributed to senior water rights.
(29) Water conswnptively used by crops attributed to junior water rights.
Column 9 plus water use from soil moisture reservoir attributed to junior water rights,
(30) Water conswnptively used by crops attributed to other diversions,
Column 10 plus water use from soil moisture reservoir attributed to other diversions,
(31) Total of estimated water supply limited crop consumptive use.
sum of colwnns 28, 29 and 30
(32) Estimated replacement requirement based on replacement of estimated conswnptive use associated with junior water rights
repeat of column 29
Note: sen= senior water rights
jnn= junior water rights 15 5 4
oth= not attributed to decreed water rights associated with ditch