Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 26.69 11.30 83.56 0.00 30Dec2017 9 a.m. 24.84 10.10 85.02 0.10 30Dec2017 10 a.m. 23.41 11.80 85.16 15.20 30Dec2017 11 a.m. 22.71 10.70 82.82 53.80 30Dec2017 12 p.m. 23.05 9.70 78.29 81.80 30Dec2017 1 p.m. 22.44 10.50 76.79 90.00 30Dec2017 2 p.m. 22.06 9.60 74.33 122.80 30Dec2017 3 p.m. 21.81 9.60 72.21 82.90 30Dec2017 4 p.m. 21.49 8.80 69.60 47.00 30Dec2017 5 p.m. 21.65 8.00 69.19 7.50 30Dec2017 6 p.m. 21.78 7.70 67.08 0.00 30Dec2017 7 p.m. 17.40 9.60 47.00 0.00 30Dec2017 8 p.m. 22.35 3.20 61.51 0.00 30Dec2017 9 p.m. 23.09 2.40 60.47 0.00 30Dec2017 10 p.m. 23.81 3.50 59.62 0.00 30Dec2017 11 p.m. 24.40 4.40 59.42 0.00 31Dec2017 12 a.m. 24.62 5.50 60.94 0.00 31Dec2017 1 a.m. 24.37 9.10 63.19 0.00 31Dec2017 2 a.m. 21.78 12.00 65.51 0.00 31Dec2017 3 a.m. 19.36 13.00 69.84 0.00 31Dec2017 4 a.m. 16.79 12.80 79.06 0.00 31Dec2017 5 a.m. 15.98 11.30 73.89 0.00 31Dec2017 6 a.m. 15.76 11.40 64.66 0.00 31Dec2017 7 a.m. 15.89 10.70 62.41 0.00 Accuml. Values 517.55 216.70 1671.57 501.10 Num. Valid Values 24 24 24 24 Avg. Values 21.56 9.03 69.65 20.88 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -5.80 348.67 69.65 43.08 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3035 definition: xcompl = 1 - (RELH_avg/100) TdC = -10.4289 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 = 0.3160 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6840 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6822 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 = 1.2098 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6922 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.037 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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