Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 9 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 10 a.m. 50.42 15.21 29.67 538.00 06Mar2018 11 a.m. 55.40 16.22 20.50 722.00 06Mar2018 12 p.m. 58.28 14.54 19.00 835.00 06Mar2018 1 p.m. 58.46 18.57 18.00 864.00 06Mar2018 2 p.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 3 p.m. 60.80 24.83 17.00 779.00 06Mar2018 4 p.m. 61.07 21.59 15.50 619.50 06Mar2018 5 p.m. 60.32 23.93 14.33 390.00 06Mar2018 6 p.m. 56.12 16.78 17.00 55.00 06Mar2018 7 p.m. 53.42 16.55 20.00 0.00 06Mar2018 8 p.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 9 p.m. 49.91 16.33 22.00 0.00 06Mar2018 10 p.m. 45.68 19.39 31.33 0.00 06Mar2018 11 p.m. 42.89 15.88 35.50 0.00 07Mar2018 12 a.m. 40.46 14.09 40.00 0.00 07Mar2018 1 a.m. 38.48 10.85 44.00 0.00 07Mar2018 2 a.m. -901.00 -901.00 -901.00 -901.00 07Mar2018 3 a.m. -901.00 -901.00 -901.00 -901.00 07Mar2018 4 a.m. -901.00 -901.00 -901.00 -901.00 07Mar2018 5 a.m. -901.00 -901.00 -901.00 -901.00 07Mar2018 6 a.m. -901.00 -901.00 -901.00 -901.00 07Mar2018 7 a.m. -901.00 -901.00 -901.00 -901.00 Accuml. Values 731.71 244.76 343.83 4802.50 Num. Valid Values 14 14 14 14 Avg. Values 52.26 17.48 24.56 343.04 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.26 675.12 24.56 707.86 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.7544 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.3829 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 = 0.5733 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4267 definition: del_lambda2 = 1 - del_lambda1 Qn = 8.0175 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 = 10.1389 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 18.2581 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.488 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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