Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 34.88 7.76 64.81 140.00 07Mar2018 9 a.m. 36.73 8.58 60.34 209.00 07Mar2018 10 a.m. 37.96 9.92 56.87 481.00 07Mar2018 11 a.m. 39.81 9.85 58.70 785.00 07Mar2018 12 p.m. 41.36 13.92 53.44 860.00 07Mar2018 1 p.m. 42.78 14.20 51.25 925.00 07Mar2018 2 p.m. 45.75 14.87 44.46 876.00 07Mar2018 3 p.m. 46.96 14.57 41.04 784.00 07Mar2018 4 p.m. 48.27 12.30 37.38 619.00 07Mar2018 5 p.m. 48.94 10.52 38.23 402.00 07Mar2018 6 p.m. 48.60 9.42 35.42 166.00 07Mar2018 7 p.m. 50.81 0.38 57.35 5.00 07Mar2018 8 p.m. 46.18 3.46 54.29 0.00 07Mar2018 9 p.m. 44.55 2.73 68.78 0.00 07Mar2018 10 p.m. 45.21 2.52 60.10 0.00 07Mar2018 11 p.m. 43.88 2.60 58.75 0.00 08Mar2018 12 a.m. 36.73 1.41 90.45 0.00 08Mar2018 1 a.m. 40.69 2.72 72.07 0.00 08Mar2018 2 a.m. 40.03 3.72 79.64 0.00 08Mar2018 3 a.m. 38.39 3.79 76.29 0.00 08Mar2018 4 a.m. 37.29 2.14 66.45 0.00 08Mar2018 5 a.m. 37.08 2.04 59.55 0.00 08Mar2018 6 a.m. 36.41 0.64 71.77 0.00 08Mar2018 7 a.m. 32.45 0.43 92.17 4.00 Accuml. Values 1001.75 154.49 1449.60 6256.00 Num. Valid Values 24 24 24 24 Avg. Values 41.74 6.44 60.40 260.67 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.41 248.57 60.40 537.89 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3960 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.6103 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 = 0.4868 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5132 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.9711 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 = 3.5603 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.4878 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.166 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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