Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 18.90 2.34 53.42 3.00 02Jan2018 9 a.m. 19.00 2.18 48.35 42.00 02Jan2018 10 a.m. 19.78 2.59 48.23 96.00 02Jan2018 11 a.m. 20.66 1.74 45.85 180.00 02Jan2018 12 p.m. 21.65 1.67 45.18 207.00 02Jan2018 1 p.m. 21.99 1.99 36.63 303.00 02Jan2018 2 p.m. 22.66 0.94 34.93 226.00 02Jan2018 3 p.m. 23.54 2.05 34.68 173.00 02Jan2018 4 p.m. 24.30 2.42 38.35 130.00 02Jan2018 5 p.m. 23.65 1.42 32.49 49.00 02Jan2018 6 p.m. 23.97 1.20 37.13 2.00 02Jan2018 7 p.m. 31.64 4.89 53.54 0.00 02Jan2018 8 p.m. 23.76 1.03 43.54 0.00 02Jan2018 9 p.m. 20.89 0.57 44.40 0.00 02Jan2018 10 p.m. 23.32 3.55 42.32 0.00 02Jan2018 11 p.m. 23.54 5.79 46.23 0.00 03Jan2018 12 a.m. 23.65 9.95 45.99 0.00 03Jan2018 1 a.m. 23.65 9.63 57.35 0.00 03Jan2018 2 a.m. 21.00 9.02 60.58 0.00 03Jan2018 3 a.m. 20.23 4.01 59.16 0.00 03Jan2018 4 a.m. 20.98 2.44 66.91 0.00 03Jan2018 5 a.m. 20.88 4.66 70.76 0.00 03Jan2018 6 a.m. 20.01 6.54 68.99 0.00 03Jan2018 7 a.m. 19.67 6.24 70.52 0.00 Accuml. Values 533.32 88.86 1185.53 1411.00 Num. Valid Values 24 24 24 24 Avg. Values 22.22 3.70 49.40 58.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -5.43 142.98 49.40 121.32 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5060 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.4166 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 = 0.3214 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6786 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0310 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 = 2.0901 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5968 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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