Detailed Weather Data for Project: KEYS
Date Time TAIR WSPD RELH SRAD
23Oct2018 8 a.m. 46.74 4.10 100.10 6.50
23Oct2018 9 a.m. 47.16 4.40 100.10 152.10
23Oct2018 10 a.m. 52.63 2.70 90.05 328.70
23Oct2018 11 a.m. 56.08 2.40 78.66 444.00
23Oct2018 12 p.m. 58.42 3.30 74.83 483.00
23Oct2018 1 p.m. 64.26 4.60 56.77 594.10
23Oct2018 2 p.m. 66.07 6.80 49.93 297.80
23Oct2018 3 p.m. 67.12 5.80 47.77 129.70
23Oct2018 4 p.m. 68.88 6.20 43.32 340.50
23Oct2018 5 p.m. 69.19 4.50 44.43 184.70
23Oct2018 6 p.m. 70.02 4.20 42.80 109.30
23Oct2018 7 p.m. 67.26 3.40 49.84 0.40
23Oct2018 8 p.m. 54.34 4.40 92.84 0.00
23Oct2018 9 p.m. 58.10 2.40 76.34 0.00
23Oct2018 10 p.m. 55.26 2.20 90.17 0.00
23Oct2018 11 p.m. 54.01 2.80 93.32 0.00
24Oct2018 12 a.m. 53.26 2.90 94.38 0.00
24Oct2018 1 a.m. 52.23 3.00 96.87 0.00
24Oct2018 2 a.m. 51.80 1.90 99.70 0.00
24Oct2018 3 a.m. 50.59 3.10 99.42 0.00
24Oct2018 4 a.m. 50.05 3.20 100.09 0.00
24Oct2018 5 a.m. 50.83 3.70 100.09 0.00
24Oct2018 6 a.m. 50.95 3.80 100.09 0.00
24Oct2018 7 a.m. 51.57 4.00 100.09 0.00
Accuml.
Values 1366.82 89.80 1922.00 3070.80
Num. Valid
Values 24 24 24 24
Avg. Values 56.95 3.74 80.08 127.95
THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS:
SRAD == CAL / SQUARE CENTIMETER
WSPD == KILOMETERS PER DAY
TAIR == DEGREES CELSIUS
RELH == PERCENT
Converted Values 13.86 144.49 80.08 264.03
Now start computations towards evaporation in inches per day
Each intermediate calculation step will be shown.
xcompl = 0.1992
definition: xcompl = 1 - (RELH_avg/100)
TdC = 10.5107
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 = 0.6094
definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)
del_lambda2 = 0.3906
definition: del_lambda2 = 1 - del_lambda1
Qn = 2.0209
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 = 3.1375
definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))
Ea = 2.2949
definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)
Daily Evap: 0.084 inches
definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4
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