Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 46.53 6.60 60.81 6.90 04Mar2018 9 a.m. 49.15 7.40 56.19 45.20 04Mar2018 10 a.m. 52.92 9.70 49.94 212.10 04Mar2018 11 a.m. 57.33 13.60 45.02 266.30 04Mar2018 12 p.m. 57.85 13.70 46.71 146.20 04Mar2018 1 p.m. 57.38 15.50 49.76 201.50 04Mar2018 2 p.m. 55.76 16.40 54.90 225.00 04Mar2018 3 p.m. 54.07 13.50 59.97 98.60 04Mar2018 4 p.m. 54.43 12.40 57.97 60.40 04Mar2018 5 p.m. 54.28 13.20 57.66 67.90 04Mar2018 6 p.m. 53.06 12.20 61.47 0.10 04Mar2018 7 p.m. 50.29 7.00 16.77 0.00 04Mar2018 8 p.m. 52.52 10.70 68.40 0.00 04Mar2018 9 p.m. 52.39 11.50 70.68 0.00 04Mar2018 10 p.m. 51.49 10.20 76.00 0.00 04Mar2018 11 p.m. 51.03 10.60 81.47 0.00 05Mar2018 12 a.m. 50.63 9.10 89.73 0.00 05Mar2018 1 a.m. 50.88 8.90 86.40 0.00 05Mar2018 2 a.m. 51.49 10.00 78.86 0.00 05Mar2018 3 a.m. 52.72 12.70 75.74 0.00 05Mar2018 4 a.m. 53.46 11.20 78.21 0.00 05Mar2018 5 a.m. 54.75 11.20 81.57 0.00 05Mar2018 6 a.m. 54.39 10.10 83.85 0.00 05Mar2018 7 a.m. 54.00 8.10 87.42 0.00 Accuml. Values 1272.79 265.50 1575.50 1330.20 Num. Valid Values 24 24 24 24 Avg. Values 53.03 11.06 65.65 55.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.69 427.19 65.65 114.37 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3435 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.5311 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 = 0.5793 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4207 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.1844 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 = 4.6906 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.4638 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.111 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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