SPDSS_Task59-1_Develop Locally Calibrated Blaney-Criddle Crop Coefficients

• Title: SPDSS Task 59.1 - Develop Locally Calibrated Blaney-Criddle Crop Coefficients
• Description: This memorandum presents the recommended regional Blaney-Criddle crop coefficients for use in the SPDSS CU analysis. Revised January 11, 2008
• Decision Support - Doc Type: Task Memorandum
• Date: 1/11/2008
• DSS Category: Consumptive Use
• DSS: South Platte
• Basin: South Platte
• Contract/PO #: C153954
• Grant Type: Non-Reimbursable
• Bill Number: SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
• Prepared By: Leonard Rice Engineering

Comparison of Monthly PCU Estimates Using the ASCE Standardized Method and the
Modified Blaney-Criddle Method with Calibrated Crop Coefficients:
PCU for Alfalfa at the Fort Lupton Climate Station
1
2
.
1
0
.
a~
a~
0
8
.
y
~~
0
6
h
~
~
. 1
1 1 1
0
1 1
U

m 0
4 I
.
.
~
a~
0
d
0
2
.
0
0
.
Jan-93 Jan-94 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01 Jan-02 Jan-03
-ASCE Standardized - -Modified Blaney-Criddle, Upper Plains Calibrated Coeff.

Figure 29 -PCU for Alfalfa at Fort Lupton
PCU for Alfalfa at the Sterling Climate Station
1.0
0
9
.
^ 0
8
.
a~
~
y
_
0
7
~
.

0
6
~
.
.
Q
E 0
5
.
c
0
4
~j
.
m
~
= 0
3
;
.
a~
0
a 0
2
.
0
1
.
0
0
.
Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06
-ASCE Standardized - - -Modified Blaney-Criddle, Lower Plains Calibrated Coeff.
Figure 30 -PCU for Alfalfa at Sterling
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