CRDSS_Task2-09-9_VerificationPenmanMonteithMethod

• Title: CRDSS Task 2.09-09 - Consumptive Use Model - Verification of the Penman-Monteith Reference Method
• Description: This task memorandum describes the method used to verify the Penman-Monteith reference method.
• Decision Support - Doc Type: Task Memorandum
• Date: 12/3/1996
• DSS Category: Consumptive Use
• DSS: Colorado River
• Basin: Colorado Mainstem
• Contract/PO #: C153658, C153727, C153752
• Grant Type: Non-Reimbursable
• Bill Number: SB92-87, HB93-1273, SB94-029, HB95-1155, SB96-153, HB97-008
• Prepared By: Riverside Technology inc.

3.0 SUPPORTING MATERIAL
Table 1. Comparison of Reference Evapotranspiration as computed using CRDSS-CU and a
spreadsheet calculator developed by Dr. Marvin E. Jensen.
ETr ETo
Day of the Year CRDSS-CU Spreadsheet Ratio CRDSS-CU Spreadsheet Ratio
152 7.7607.6591.0135.6905.6311.010
153 7.4637.3531.0155.4085.3411.013
154 11.12810.9321.0187.0796.9631.017
155 11.44511.2421.0187.4327.3061.017
156 8.9008.7501.0176.1706.0751.016
157 14.17113.9131.0198.9238.7661.018
158 10.96010.7751.0177.3237.2051.016
159 8.7008.4841.0256.1876.0171.028
160 8.8908.7401.0176.2086.1101.016
161 7.3007.1741.0185.3145.2301.016
Average 9.6729.5021.0186.5736.4641.017
10
8
6
4
2
0
152 153 154 155 156 157 158 159 160 161
DOY
CRDSS-CU Spreadsheet
Figure 1. Comparison of the grass-based Reference Evapotranspiration (ETo) as computed
3
12/3/96 2.09-09- IDS/CSU