Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 49.84 18.60 67.31 73.40 05Mar2018 9 a.m. 51.94 19.50 53.24 275.20 05Mar2018 10 a.m. 53.65 19.90 46.51 462.30 05Mar2018 11 a.m. 54.18 21.60 43.12 615.10 05Mar2018 12 p.m. 55.80 20.80 35.10 719.00 05Mar2018 1 p.m. 57.33 22.00 27.97 761.20 05Mar2018 2 p.m. 58.28 20.80 23.99 729.40 05Mar2018 3 p.m. 58.91 18.00 22.28 366.20 05Mar2018 4 p.m. 59.47 19.30 19.86 448.50 05Mar2018 5 p.m. 59.49 17.00 20.93 330.90 05Mar2018 6 p.m. 59.11 14.60 21.82 118.90 05Mar2018 7 p.m. 49.75 21.30 32.84 1.60 05Mar2018 8 p.m. 53.62 2.80 31.64 0.00 05Mar2018 9 p.m. 46.74 0.80 43.48 0.00 05Mar2018 10 p.m. 43.25 0.30 50.82 0.00 05Mar2018 11 p.m. 41.07 0.90 62.72 0.00 06Mar2018 12 a.m. 39.81 1.40 69.64 0.00 06Mar2018 1 a.m. 38.17 2.00 73.87 0.00 06Mar2018 2 a.m. 38.19 2.50 67.89 0.00 06Mar2018 3 a.m. 39.72 3.70 53.34 0.00 06Mar2018 4 a.m. 40.46 3.30 46.55 0.00 06Mar2018 5 a.m. 39.61 2.80 48.92 0.00 06Mar2018 6 a.m. 38.44 4.20 52.22 0.00 06Mar2018 7 a.m. 37.99 5.00 51.52 0.00 Accuml. Values 1164.83 263.10 1067.58 4901.70 Num. Valid Values 24 24 24 24 Avg. Values 48.53 10.96 44.48 204.24 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.19 423.33 44.48 421.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5552 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.3632 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 = 0.5434 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4566 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.7391 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 = 6.5092 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.5659 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.234 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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