Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. -901.00 -901.00 -901.00 -901.00 07Mar2018 9 a.m. 36.68 11.41 55.00 437.00 07Mar2018 10 a.m. 38.54 11.78 52.33 600.33 07Mar2018 11 a.m. -901.00 -901.00 -901.00 -901.00 07Mar2018 12 p.m. 44.42 9.39 42.67 823.33 07Mar2018 1 p.m. 46.67 11.86 37.50 849.50 07Mar2018 2 p.m. 49.91 11.74 33.00 823.00 07Mar2018 3 p.m. 50.72 7.61 29.00 769.00 07Mar2018 4 p.m. 53.18 6.26 27.67 533.67 07Mar2018 5 p.m. 53.64 6.10 27.00 359.25 07Mar2018 6 p.m. 51.44 5.59 32.00 83.00 07Mar2018 7 p.m. 45.14 4.70 46.00 0.00 07Mar2018 8 p.m. 42.89 2.57 49.50 0.00 07Mar2018 9 p.m. 38.54 1.34 65.33 0.00 07Mar2018 10 p.m. 33.62 2.61 80.67 0.00 07Mar2018 11 p.m. 30.88 3.36 84.75 0.00 08Mar2018 12 a.m. 28.90 3.24 88.75 0.00 08Mar2018 1 a.m. 28.63 3.58 88.75 0.00 08Mar2018 2 a.m. 27.46 2.74 90.50 0.00 08Mar2018 3 a.m. 28.58 1.27 89.67 0.00 08Mar2018 4 a.m. 27.46 2.46 91.25 0.00 08Mar2018 5 a.m. 27.50 3.02 88.00 0.00 08Mar2018 6 a.m. 27.01 3.97 89.00 0.00 08Mar2018 7 a.m. 27.68 2.46 90.50 7.50 Accuml. Values 839.49 119.06 1378.84 5285.58 Num. Valid Values 22 22 22 22 Avg. Values 38.16 5.41 62.67 240.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.42 208.98 62.67 495.77 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3733 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.9911 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 = 0.4563 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5437 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.2693 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 = 2.9195 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6341 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.133 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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