Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 66.24 15.04 87.75 8.50 04Dec2017 9 a.m. 67.46 14.61 84.67 36.00 04Dec2017 10 a.m. 69.30 15.83 80.25 106.50 04Dec2017 11 a.m. 71.72 15.58 74.00 187.00 04Dec2017 12 p.m. 74.79 14.71 66.25 368.00 04Dec2017 1 p.m. 77.60 18.86 55.67 442.33 04Dec2017 2 p.m. 78.44 19.57 51.00 311.00 04Dec2017 3 p.m. 80.28 18.68 43.25 326.00 04Dec2017 4 p.m. 78.03 15.27 38.75 135.50 04Dec2017 5 p.m. 74.70 9.39 39.00 45.00 04Dec2017 6 p.m. 68.54 11.86 39.00 0.00 04Dec2017 7 p.m. 61.88 15.21 39.00 0.00 04Dec2017 8 p.m. 60.62 19.68 28.00 0.00 04Dec2017 9 p.m. 58.22 17.60 23.33 0.00 04Dec2017 10 p.m. 56.66 17.15 26.33 0.00 04Dec2017 11 p.m. 52.88 24.83 37.00 0.00 05Dec2017 12 a.m. 50.94 19.85 38.25 0.00 05Dec2017 1 a.m. 47.75 15.94 39.75 0.00 05Dec2017 2 a.m. 45.00 15.15 42.75 0.00 05Dec2017 3 a.m. 43.28 13.20 44.67 0.00 05Dec2017 4 a.m. 42.30 16.89 42.75 0.00 05Dec2017 5 a.m. 41.00 12.30 47.00 0.00 05Dec2017 6 a.m. 40.32 13.87 39.50 0.00 05Dec2017 7 a.m. 39.56 11.52 35.00 0.00 Accuml. Values 1447.51 382.59 1142.92 1965.83 Num. Valid Values 24 24 24 24 Avg. Values 60.31 15.94 47.62 81.91 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.73 615.59 47.62 169.02 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5238 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.6118 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 = 0.6341 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3659 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9275 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 = 9.3876 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 15.8233 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.251 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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