Detailed Weather Data for Project: KEYS
Date Time TAIR WSPD RELH SRAD
22Oct2018 8 a.m. 46.99 5.10 82.36 3.40
22Oct2018 9 a.m. 47.91 5.20 80.93 154.00
22Oct2018 10 a.m. 53.46 3.80 69.14 344.60
22Oct2018 11 a.m. 56.80 8.70 59.53 498.10
22Oct2018 12 p.m. 60.22 7.60 53.17 574.00
22Oct2018 1 p.m. 62.49 7.90 49.61 604.00
22Oct2018 2 p.m. 64.38 7.20 48.29 335.10
22Oct2018 3 p.m. 65.97 7.00 46.63 173.00
22Oct2018 4 p.m. 66.87 7.30 46.97 324.40
22Oct2018 5 p.m. 67.15 6.90 46.97 134.40
22Oct2018 6 p.m. 66.81 6.20 47.65 79.20
22Oct2018 7 p.m. 64.29 3.10 57.30 3.60
22Oct2018 8 p.m. 61.81 2.40 65.93 0.00
22Oct2018 9 p.m. 58.69 4.20 70.40 0.00
22Oct2018 10 p.m. 57.31 4.10 73.73 0.00
22Oct2018 11 p.m. 56.28 2.80 76.08 0.00
23Oct2018 12 a.m. 55.83 2.00 76.69 0.00
23Oct2018 1 a.m. 55.99 1.80 75.16 0.00
23Oct2018 2 a.m. 55.65 1.30 76.89 0.00
23Oct2018 3 a.m. 52.34 2.70 87.14 0.00
23Oct2018 4 a.m. 50.83 3.60 90.40 0.00
23Oct2018 5 a.m. 49.24 3.60 95.57 0.00
23Oct2018 6 a.m. 48.15 4.10 100.09 0.00
23Oct2018 7 a.m. 47.77 2.70 100.00 0.00
Accuml.
Values 1373.25 111.30 1676.63 3227.80
Num. Valid
Values 24 24 24 24
Avg. Values 57.22 4.64 69.86 134.49
THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS:
SRAD == CAL / SQUARE CENTIMETER
WSPD == KILOMETERS PER DAY
TAIR == DEGREES CELSIUS
RELH == PERCENT
Converted Values 14.01 179.08 69.86 277.53
Now start computations towards evaporation in inches per day
Each intermediate calculation step will be shown.
xcompl = 0.3014
definition: xcompl = 1 - (RELH_avg/100)
TdC = 8.6634
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 = 0.6114
definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)
del_lambda2 = 0.3886
definition: del_lambda2 = 1 - del_lambda1
Qn = 2.1986
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 = 4.7766
definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))
Ea = 3.7192
definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)
Daily Evap: 0.110 inches
definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4
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