Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 47.16 14.60 51.46 83.25 05Mar2018 9 a.m. 48.36 17.06 48.23 299.69 05Mar2018 10 a.m. 49.73 17.72 41.18 508.63 05Mar2018 11 a.m. 51.28 19.05 33.96 679.63 05Mar2018 12 p.m. 53.91 19.56 25.15 796.56 05Mar2018 1 p.m. 55.89 18.95 18.87 831.37 05Mar2018 2 p.m. 56.84 18.55 15.52 817.08 05Mar2018 3 p.m. 57.40 19.31 12.10 724.53 05Mar2018 4 p.m. 58.55 15.86 10.40 571.53 05Mar2018 5 p.m. 59.38 15.40 9.37 388.18 05Mar2018 6 p.m. 59.13 12.23 9.74 160.42 05Mar2018 7 p.m. 51.37 14.43 14.92 1.95 05Mar2018 8 p.m. 53.83 4.47 14.78 0.00 05Mar2018 9 p.m. 49.17 2.97 43.68 0.00 05Mar2018 10 p.m. 43.43 4.96 64.50 0.00 05Mar2018 11 p.m. 42.21 5.00 65.64 0.00 06Mar2018 12 a.m. 41.14 3.70 67.26 0.00 06Mar2018 1 a.m. 39.33 3.45 69.96 0.00 06Mar2018 2 a.m. 37.06 3.77 68.19 0.00 06Mar2018 3 a.m. 38.34 6.55 55.43 0.00 06Mar2018 4 a.m. 38.46 5.87 61.63 0.00 06Mar2018 5 a.m. 37.11 5.85 53.65 0.00 06Mar2018 6 a.m. 37.71 8.10 42.89 0.00 06Mar2018 7 a.m. 37.17 8.11 42.37 0.00 Accuml. Values 1143.93 265.52 940.88 5862.82 Num. Valid Values 24 24 24 24 Avg. Values 47.66 11.06 39.20 244.28 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.70 427.22 39.20 504.09 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6080 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.5371 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 = 0.5362 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4638 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.7952 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 = 6.9108 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.0911 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.267 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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