Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 33.31 2.70 75.73 150.90 06Mar2018 9 a.m. 44.65 4.70 45.83 388.40 06Mar2018 10 a.m. 49.68 14.30 31.65 599.30 06Mar2018 11 a.m. 51.87 23.90 31.84 755.80 06Mar2018 12 p.m. 53.40 20.40 28.36 845.10 06Mar2018 1 p.m. 55.08 20.10 24.55 869.70 06Mar2018 2 p.m. 55.96 24.00 24.58 819.20 06Mar2018 3 p.m. 56.91 24.10 22.94 701.60 06Mar2018 4 p.m. 57.81 23.20 21.43 527.60 06Mar2018 5 p.m. 57.43 26.80 23.97 310.60 06Mar2018 6 p.m. 56.61 32.80 25.21 89.20 06Mar2018 7 p.m. 49.78 6.90 41.20 0.00 06Mar2018 8 p.m. 53.82 32.50 27.07 0.00 06Mar2018 9 p.m. 50.47 40.60 35.24 0.00 06Mar2018 10 p.m. 47.61 34.20 41.55 0.00 06Mar2018 11 p.m. 44.94 30.40 45.85 0.00 07Mar2018 12 a.m. 42.80 30.50 49.22 0.00 07Mar2018 1 a.m. 41.22 23.70 51.68 0.00 07Mar2018 2 a.m. 39.51 19.60 52.63 0.00 07Mar2018 3 a.m. 38.17 21.40 57.51 0.00 07Mar2018 4 a.m. 36.95 15.80 59.35 0.00 07Mar2018 5 a.m. 36.16 16.10 60.91 0.00 07Mar2018 6 a.m. 35.28 10.20 61.40 0.00 07Mar2018 7 a.m. 35.06 16.50 63.14 5.30 Accuml. Values 1124.47 515.40 1002.84 6062.70 Num. Valid Values 24 24 24 24 Avg. Values 46.85 21.48 41.78 252.61 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.25 829.28 41.78 521.27 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5821 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.0762 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 = 0.5296 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4704 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.9898 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 = 6.4165 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 14.5019 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.373 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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