Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 40.14 4.94 73.84 2.00 30Dec2017 9 a.m. 39.04 8.01 72.49 21.00 30Dec2017 10 a.m. 36.95 10.58 75.06 55.00 30Dec2017 11 a.m. 35.74 12.84 77.99 59.00 30Dec2017 12 p.m. 34.86 8.21 79.76 65.00 30Dec2017 1 p.m. 34.20 7.48 75.55 71.00 30Dec2017 2 p.m. 33.76 6.91 73.23 77.00 30Dec2017 3 p.m. 33.55 6.56 70.11 127.00 30Dec2017 4 p.m. 32.34 7.46 71.64 65.00 30Dec2017 5 p.m. 31.66 6.41 73.22 21.00 30Dec2017 6 p.m. 30.69 5.80 73.35 1.00 30Dec2017 7 p.m. 20.35 9.47 34.63 0.00 30Dec2017 8 p.m. 29.70 4.47 72.80 0.00 30Dec2017 9 p.m. 29.03 4.66 74.69 0.00 30Dec2017 10 p.m. 29.37 3.41 76.28 0.00 30Dec2017 11 p.m. 29.26 2.90 76.95 0.00 31Dec2017 12 a.m. 28.49 3.07 88.01 0.00 31Dec2017 1 a.m. 28.49 3.57 94.30 0.00 31Dec2017 2 a.m. 28.71 4.60 95.40 0.00 31Dec2017 3 a.m. 27.72 6.54 95.03 0.00 31Dec2017 4 a.m. 28.27 4.20 95.21 0.00 31Dec2017 5 a.m. 26.94 7.03 92.22 0.00 31Dec2017 6 a.m. 23.54 11.54 88.19 0.00 31Dec2017 7 a.m. 22.98 9.39 85.13 0.00 Accuml. Values 735.78 160.05 1885.08 564.00 Num. Valid Values 24 24 24 24 Avg. Values 30.66 6.67 78.54 23.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -0.75 257.52 78.54 48.49 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2146 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.0026 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 = 0.3921 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6079 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6135 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 = 1.2488 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4187 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.024 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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