Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 13.64 4.08 69.25 4.50 02Jan2018 9 a.m. 14.90 3.24 64.50 44.50 02Jan2018 10 a.m. 17.69 5.54 54.50 101.50 02Jan2018 11 a.m. 18.92 5.37 49.33 136.67 02Jan2018 12 p.m. 19.99 4.36 45.25 189.50 02Jan2018 1 p.m. 20.90 2.31 41.33 187.00 02Jan2018 2 p.m. 21.52 2.63 38.25 115.75 02Jan2018 3 p.m. 22.19 4.92 43.25 123.25 02Jan2018 4 p.m. 21.74 8.28 49.00 80.67 02Jan2018 5 p.m. 21.38 6.71 49.00 55.50 02Jan2018 6 p.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 7 p.m. 20.48 3.36 51.00 0.00 02Jan2018 8 p.m. 20.30 2.91 53.00 0.00 02Jan2018 9 p.m. 20.21 3.36 54.50 0.00 02Jan2018 10 p.m. 19.94 3.80 56.67 0.00 02Jan2018 11 p.m. 19.31 3.19 59.50 0.00 03Jan2018 12 a.m. 16.48 3.19 64.75 0.00 03Jan2018 1 a.m. 14.68 4.92 71.50 0.00 03Jan2018 2 a.m. 13.69 4.64 73.50 0.00 03Jan2018 3 a.m. 12.56 2.09 76.33 0.00 03Jan2018 4 a.m. 12.29 2.85 78.25 0.00 03Jan2018 5 a.m. 10.94 1.90 81.00 0.00 03Jan2018 6 a.m. 11.53 1.45 82.25 0.00 03Jan2018 7 a.m. 11.39 1.23 77.00 0.00 Accuml. Values 396.67 86.33 1382.91 1038.84 Num. Valid Values 23 23 23 23 Avg. Values 17.25 3.75 60.13 45.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.20 144.94 60.13 93.20 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3987 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.5493 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 = 0.2817 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7183 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2915 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 = 1.3246 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0762 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.027 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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