Estimated Consumptive Use for the NWS Station at SNOWVILLE
From a Calibrated SCS Blaney-Criddle Equation using data from SNOWVILLE 10-13-1994
Years of Data Available; NWS: 1961-1990 SNOWVILLE: 1990-1990 Elev. 4560 ft., Lat. 41.97
_____________________________________________________________________________________________________________
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
_____________________________________________________________________________________________________________
% Day Light 6.59 6.60 8.26 8.99 10.16 10.27 10.42 9.68 8.41 7.67 6.58 6.37 100.00
Avg Temp F 21.43 27.52 35.20 43.89 52.73 61.95 70.49 68.58 58.37 46.96 34.31 23.75 45.43
Std Dev Temp 4.77 5.31 4.03 3.33 2.33 2.99 1.94 2.21 3.59 2.82 2.74 4.03 1.36
Avg Prec in. 1.03 0.84 1.08 1.20 1.74 1.18 0.86 0.74 0.91 0.93 1.23 1.06 12.80
Std Dev Prec 0.63 0.59 0.69 0.99 1.09 1.09 0.87 0.62 0.82 0.70 0.87 0.80 4.01
SCS-BC f in. 0.42 0.55 0.95 1.77 3.21 4.84 6.66 5.80 3.43 1.80 0.70 0.45 30.59
Std Dev f 0.09 0.11 0.23 0.35 0.36 0.57 0.43 0.44 0.52 0.28 0.09 0.08 1.60
ALFALFA
Cal SCS-BC k 0.30 1.77 1.40 1.18 1.30 0.99 0.58
Cal SCS-BC Et 0.54 5.67 6.76 7.84 7.54 3.38 1.04 32.78
Std Dev Et 0.11 0.63 0.80 0.51 0.57 0.51 0.16 1.75
Net Irr in. 4.29 5.82 7.15 6.95 2.65 0.30 27.16
PASTURE
Cal SCS-BC k 0.55 1.14 1.18 0.95 0.90 0.82 0.39
Cal SCS-BC Et 0.98 3.65 5.70 6.30 5.19 2.80 0.71 25.33
Std Dev Et 0.20 0.40 0.67 0.41 0.40 0.42 0.11 1.41
Net Irr in. 0.02 2.26 4.76 5.61 4.60 2.07 19.32
OTHR HAY
Cal SCS-BC k 0.97 1.80 1.89 1.07 0.50 0.20
Cal SCS-BC Et 1.72 5.77 9.15 7.14 2.89 0.68 27.34
Std Dev Et 0.34 0.64 1.08 0.47 0.22 0.10 1.77
Net Irr in. 0.76 4.38 8.20 6.45 2.30 22.09
SP GRAIN
Cal SCS-BC k 0.20 1.04 1.80 1.34 0.25
Cal SCS-BC Et 0.35 3.34 8.71 8.90 1.44 22.75
Std Dev Et 0.07 0.37 1.03 0.58 0.11 1.45
Net Irr in. 1.95 7.76 8.21 0.85 18.78
TURF
Cal SCS-BC k 0.80 1.03 1.02 0.81 0.77 0.70 0.34
Cal SCS-BC Et 1.41 3.32 4.91 5.43 4.48 2.42 0.61 22.58
Std Dev Et 0.28 0.37 0.58 0.35 0.34 0.36 0.10 1.29
Net Irr in. 0.45 1.93 3.97 4.74 3.89 1.68 16.67
GARDEN
Cal SCS-BC k 0.35 0.73 1.03 0.94 0.25
Cal SCS-BC Et 1.13 3.54 6.83 5.42 0.84 17.75
Std Dev Et 0.12 0.42 0.44 0.41 0.13 0.94
Net Irr in. 2.59 6.14 4.83 0.11 13.67
E-LAKE
Cal SCS-BC k 0.96 1.66 1.50 1.24 0.89 0.98 0.93 1.33
Cal SCS-BC Evap 0.92 2.94 4.82 6.00 5.92 5.66 3.20 2.39 31.84
Std Dev Evap 0.22 0.59 0.53 0.71 0.39 0.43 0.48 0.37 1.91
Net Loss in. 1.74 3.09 4.82 5.06 4.92 2.28 1.46 23.36
ET Ref
Cal SCS-BC k 1.07 1.84 1.85 1.81 1.46 1.38 1.26 1.61
Estimated Etr 1.02 3.26 5.93 8.78 9.69 7.99 4.31 2.90 43.88
Std Dev Et 0.25 0.65 0.66 1.03 0.63 0.61 0.65 0.45 2.54
_____________________________________________________________________________________________________________
All Values are 30 Year Averages. Effective Precipitation is 80 Percent of Total During Growing Season
Blank values (if any) of ET Ref in early and late months denotes only seasonal calibration data
Adapted from Hill, 1994, Consumptive Use of Irrigated Crops in Utah, Ut Ag Exp Stn Res Rpt #145 Utah State Univ., Logan UT