RGDSS_Historic_CUreport_20040601

• Title: RGDSS - Rio Grande Historic Crop Consumptive Use Analysis
• Description: The documentation is for the Rio Grande Basin Historic Crop Consumptive Use Analysis, developed during the RGDSS implementation for the period 1950 through 2002. It includes 100 percent of the crop consumptive use in the basin for the period. Documentation consists of the final Historic Crop Consumptive Use Analysis Report and supporting appendices.
• Decision Support - Doc Type: Modeling Dataset Documentation
• Date: 6/1/2004
• DSS Category: Consumptive Use
• DSS: Rio Grande
• Basin: Rio Grande
• Contract/PO #: C153863
• Grant Type: Non-Reimbursable
• Bill Number: HB98-1189, SB99-173
• Prepared By: Leonard Rice Engineering

Table 13 shows original TR-21 and locally calibrated crop coefficients by percent growth
developed for potatoes and small grains, annual crops. As described in Appendix F,
spring grain crop coefficients from TR-21 were used as the basis for calibrating small
grain coefficients.
Table 13
TR-21 and Calibrated Crop Coefficients for Potatoes and Small Grains
Percent of Potatoes Small Grains
Growing
Season TR-21 Calibrated TR-21
(Spring Grain) Calibrated
0 0.200 0.400 0.280 0.360
5 0.220 0.440 0.350 0.450
10 0.250 0.480 0.460 0.630
15 0.280 0.550 0.580 0.810
20 0.330 0.610 0.710 1.030
25 0.400 0.730 0.830 1.280
30 0.500 0.870 0.940 1.330
35 0.640 1.030 1.040 1.470
40 0.790 1.150 1.150 1.630
45 0.900 1.250 1.250 1.770
50 0.970 1.340 1.310 1.860
55 1.010 1.450 1.310 1.780
60 1.020 1.420 1.270 1.480
65 1.000 1.380 1.180 1.310
70 0.940 1.310 1.040 1.310
75 0.880 1.230 0.870 1.230
80 0.800 1.490 0.690 1.260
85 0.730 1.030 0.500 1.050
90 0.660 0.670 0.300 0.690
95 0.570 0.400 0.130 0.300
100 0.490 0.240 0.000 0.000
The calibrated Blaney-Griddle crop coefficients were provided to the Relational Database
Contractor and are stored in HydroBase. The crop coefficient file used in the historic
consumptive use analysis was created by hand. However, it is anticipated that the precu
DMI will be used to extract the calibrated crop coefficients from HydroBase and develop
the crop coefficient input file.
cureport_6-2004.doc 32 of 48 June, 2004