Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 56.41 2.90 52.76 5.20 04Mar2018 9 a.m. 58.21 4.50 51.05 64.00 04Mar2018 10 a.m. 58.89 4.90 52.43 99.30 04Mar2018 11 a.m. 59.47 3.50 53.71 101.70 04Mar2018 12 p.m. 59.85 3.20 55.46 103.90 04Mar2018 1 p.m. 61.20 5.00 59.43 141.00 04Mar2018 2 p.m. 60.60 5.60 64.42 95.70 04Mar2018 3 p.m. 59.29 4.60 69.12 74.50 04Mar2018 4 p.m. 58.91 4.30 72.51 39.30 04Mar2018 5 p.m. 57.92 4.70 77.28 44.40 04Mar2018 6 p.m. 56.62 4.20 80.75 1.30 04Mar2018 7 p.m. 57.25 7.40 27.08 0.20 04Mar2018 8 p.m. 56.21 4.50 82.16 0.00 04Mar2018 9 p.m. 56.07 5.20 81.28 0.00 04Mar2018 10 p.m. 56.39 4.80 78.87 0.00 04Mar2018 11 p.m. 56.26 5.20 79.56 0.00 05Mar2018 12 a.m. 56.19 5.40 78.77 0.00 05Mar2018 1 a.m. 56.68 5.10 79.46 0.00 05Mar2018 2 a.m. 57.47 5.30 80.56 0.00 05Mar2018 3 a.m. 59.40 6.10 81.82 0.00 05Mar2018 4 a.m. 61.18 7.30 83.10 0.00 05Mar2018 5 a.m. 62.22 8.30 83.84 0.00 05Mar2018 6 a.m. 63.45 6.30 84.40 0.00 05Mar2018 7 a.m. 59.65 12.20 77.86 0.00 Accuml. Values 1405.78 130.50 1687.68 770.50 Num. Valid Values 24 24 24 24 Avg. Values 58.57 5.44 70.32 32.10 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.76 209.97 70.32 66.25 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2968 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.4841 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 = 0.6214 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3786 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2954 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 = 4.9349 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.1925 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.055 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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