Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 33.80 6.71 64.25 3.50 29Dec2017 9 a.m. 33.98 7.08 64.67 23.00 29Dec2017 10 a.m. 34.88 8.84 65.50 65.50 29Dec2017 11 a.m. 36.62 12.60 67.00 191.00 29Dec2017 12 p.m. 38.21 11.86 69.50 172.25 29Dec2017 1 p.m. 39.32 11.63 70.00 185.33 29Dec2017 2 p.m. 40.50 10.57 68.50 165.00 29Dec2017 3 p.m. 41.81 13.20 69.00 166.50 29Dec2017 4 p.m. 42.21 10.01 69.50 95.50 29Dec2017 5 p.m. 42.08 8.50 71.00 33.25 29Dec2017 6 p.m. 41.90 6.71 75.00 0.00 29Dec2017 7 p.m. 41.90 2.91 77.00 0.00 29Dec2017 8 p.m. 41.72 3.02 78.50 0.00 29Dec2017 9 p.m. 41.48 2.98 82.00 0.00 29Dec2017 10 p.m. 41.36 2.98 84.00 0.00 29Dec2017 11 p.m. 41.54 4.70 89.00 0.00 30Dec2017 12 a.m. 41.13 4.19 87.75 0.00 30Dec2017 1 a.m. 40.68 3.86 86.50 0.00 30Dec2017 2 a.m. 40.37 3.36 87.75 0.00 30Dec2017 3 a.m. 40.10 3.65 89.00 0.00 30Dec2017 4 a.m. 39.78 3.91 89.75 0.00 30Dec2017 5 a.m. 39.47 3.13 90.00 0.00 30Dec2017 6 a.m. 39.33 4.81 90.50 0.00 30Dec2017 7 a.m. 39.29 6.04 90.50 0.00 Accuml. Values 953.46 157.25 1876.17 1100.83 Num. Valid Values 24 24 24 24 Avg. Values 39.73 6.55 78.17 45.87 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.29 253.02 78.17 94.65 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2183 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.8421 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 = 0.4697 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5303 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1466 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 = 1.8151 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9496 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.038 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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