Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 45.09 1.81 74.81 108.00 03Mar2018 9 a.m. 48.49 2.29 67.85 135.00 03Mar2018 10 a.m. 51.80 2.43 61.07 509.00 03Mar2018 11 a.m. 56.19 2.09 52.64 699.00 03Mar2018 12 p.m. 59.70 1.55 48.30 808.00 03Mar2018 1 p.m. 62.56 1.89 44.95 852.00 03Mar2018 2 p.m. 64.74 1.83 42.13 826.00 03Mar2018 3 p.m. 66.61 1.84 40.73 732.00 03Mar2018 4 p.m. 66.74 2.38 41.71 565.00 03Mar2018 5 p.m. 66.29 1.98 40.85 362.00 03Mar2018 6 p.m. 63.21 1.23 47.94 141.00 03Mar2018 7 p.m. 54.54 1.91 79.33 1.00 03Mar2018 8 p.m. 57.27 1.64 50.81 0.00 03Mar2018 9 p.m. 54.32 0.26 59.12 0.00 03Mar2018 10 p.m. 53.01 0.61 58.14 0.00 03Mar2018 11 p.m. 51.67 0.85 65.53 0.00 04Mar2018 12 a.m. 51.46 2.80 65.47 0.00 04Mar2018 1 a.m. 52.45 2.34 61.74 0.00 04Mar2018 2 a.m. 51.80 2.69 63.76 0.00 04Mar2018 3 a.m. 51.57 2.27 65.47 0.00 04Mar2018 4 a.m. 51.57 2.19 65.35 0.00 04Mar2018 5 a.m. 50.47 1.54 72.80 0.00 04Mar2018 6 a.m. 50.36 1.79 71.94 0.00 04Mar2018 7 a.m. 49.71 2.85 74.45 0.00 Accuml. Values 1331.62 45.06 1416.89 5738.00 Num. Valid Values 24 24 24 24 Avg. Values 55.48 1.88 59.04 239.08 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.05 72.50 59.04 493.35 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4096 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.2812 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 = 0.5983 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4017 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.0228 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 = 6.1336 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.1096 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.167 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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