Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 45.32 2.20 74.16 64.50 03Mar2018 9 a.m. 49.14 3.80 67.41 254.90 03Mar2018 10 a.m. 54.18 5.20 58.61 433.30 03Mar2018 11 a.m. 58.96 6.10 50.84 576.80 03Mar2018 12 p.m. 63.07 6.10 45.66 672.00 03Mar2018 1 p.m. 66.61 6.90 43.34 695.60 03Mar2018 2 p.m. 67.82 7.10 43.86 536.70 03Mar2018 3 p.m. 69.35 6.20 41.96 303.60 03Mar2018 4 p.m. 70.32 5.20 39.73 425.90 03Mar2018 5 p.m. 70.00 6.10 39.56 264.30 03Mar2018 6 p.m. 68.56 5.70 41.31 80.90 03Mar2018 7 p.m. 56.05 5.10 81.23 0.00 03Mar2018 8 p.m. 62.65 2.50 49.36 0.00 03Mar2018 9 p.m. 60.89 3.20 52.56 0.00 03Mar2018 10 p.m. 59.56 3.60 53.59 0.00 03Mar2018 11 p.m. 58.23 2.00 52.82 0.00 04Mar2018 12 a.m. 58.51 2.30 50.21 0.00 04Mar2018 1 a.m. 59.23 2.90 46.84 0.00 04Mar2018 2 a.m. 58.33 3.30 48.70 0.00 04Mar2018 3 a.m. 57.90 2.70 48.66 0.00 04Mar2018 4 a.m. 55.78 2.50 53.13 0.00 04Mar2018 5 a.m. 54.61 2.50 54.83 0.00 04Mar2018 6 a.m. 54.39 1.80 55.96 0.00 04Mar2018 7 a.m. 54.16 1.40 57.05 0.00 Accuml. Values 1433.62 96.40 1251.38 4308.50 Num. Valid Values 24 24 24 24 Avg. Values 59.73 4.02 52.14 179.52 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.41 155.11 52.14 370.44 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4786 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.6589 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 = 0.6299 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3701 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.5064 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 = 8.3788 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.6471 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.169 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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