Detailed Weather Data for Project: KEYS
Date Time TAIR WSPD RELH SRAD
24Oct2018 8 a.m. 51.57 4.30 100.09 0.00
24Oct2018 9 a.m. 51.91 3.80 100.09 22.30
24Oct2018 10 a.m. 53.47 4.00 98.97 56.00
24Oct2018 11 a.m. 55.71 6.10 92.97 74.50
24Oct2018 12 p.m. 58.33 5.90 83.03 152.40
24Oct2018 1 p.m. 60.26 7.00 72.47 124.60
24Oct2018 2 p.m. 60.46 7.50 69.79 76.70
24Oct2018 3 p.m. 60.91 4.40 65.01 47.50
24Oct2018 4 p.m. 60.53 6.20 57.37 45.50
24Oct2018 5 p.m. 58.35 3.90 68.37 12.60
24Oct2018 6 p.m. 56.55 5.80 76.65 0.50
24Oct2018 7 p.m. 55.65 4.90 86.02 0.00
24Oct2018 8 p.m. 54.34 4.40 92.84 0.00
24Oct2018 9 p.m. 55.35 4.90 84.66 0.00
24Oct2018 10 p.m. 55.04 3.10 83.05 0.00
24Oct2018 11 p.m. 55.35 1.90 85.29 0.00
25Oct2018 12 a.m. 53.78 4.80 90.35 0.00
25Oct2018 1 a.m. 51.03 7.40 96.97 0.00
25Oct2018 2 a.m. 49.26 4.80 100.09 0.00
25Oct2018 3 a.m. 49.23 5.80 100.10 0.00
25Oct2018 4 a.m. 49.26 7.90 100.09 0.00
25Oct2018 5 a.m. 48.38 9.20 100.10 0.00
25Oct2018 6 a.m. 48.29 7.50 100.10 0.00
25Oct2018 7 a.m. 48.52 7.60 100.10 0.00
Accuml.
Values 1301.52 133.10 2104.57 612.60
Num. Valid
Values 24 24 24 24
Avg. Values 54.23 5.55 87.69 25.52
THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS:
SRAD == CAL / SQUARE CENTIMETER
WSPD == KILOMETERS PER DAY
TAIR == DEGREES CELSIUS
RELH == PERCENT
Converted Values 12.35 214.16 87.69 52.67
Now start computations towards evaporation in inches per day
Each intermediate calculation step will be shown.
xcompl = 0.1231
definition: xcompl = 1 - (RELH_avg/100)
TdC = 10.3534
definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14))
del_lambda1 = 0.5886
definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)
del_lambda2 = 0.4114
definition: del_lambda2 = 1 - del_lambda1
Qn = -0.4714
definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02
es_ea = 1.7799
definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))
Ea = 1.7291
definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)
Daily Evap: 0.017 inches
definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4
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