Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 45.43 7.80 53.14 129.00 06Mar2018 9 a.m. 47.95 9.76 40.80 174.00 06Mar2018 10 a.m. 53.22 12.40 25.28 579.00 06Mar2018 11 a.m. 55.54 15.82 21.01 769.00 06Mar2018 12 p.m. 57.18 18.30 17.53 882.00 06Mar2018 1 p.m. 58.17 20.57 18.57 927.00 06Mar2018 2 p.m. 58.39 22.94 19.67 896.00 06Mar2018 3 p.m. 59.49 21.74 16.73 782.00 06Mar2018 4 p.m. 58.82 24.61 16.49 584.00 06Mar2018 5 p.m. 57.72 23.46 15.88 341.00 06Mar2018 6 p.m. 55.63 23.64 16.91 114.00 06Mar2018 7 p.m. 46.96 5.80 46.35 6.00 06Mar2018 8 p.m. 46.51 17.77 35.36 0.00 06Mar2018 9 p.m. 42.57 18.92 41.10 0.00 06Mar2018 10 p.m. 41.25 14.03 43.18 0.00 06Mar2018 11 p.m. 39.92 13.08 44.95 0.00 07Mar2018 12 a.m. 38.16 9.98 49.22 0.00 07Mar2018 1 a.m. 36.63 8.90 53.74 0.00 07Mar2018 2 a.m. 36.07 6.42 56.86 0.00 07Mar2018 3 a.m. 35.19 7.45 60.58 0.00 07Mar2018 4 a.m. 34.00 7.44 63.65 0.00 07Mar2018 5 a.m. 33.44 6.90 66.27 0.00 07Mar2018 6 a.m. 32.45 6.23 69.51 0.00 07Mar2018 7 a.m. 32.56 6.57 70.73 3.00 Accuml. Values 1103.23 330.53 963.51 6186.00 Num. Valid Values 24 24 24 24 Avg. Values 45.97 13.77 40.15 257.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.76 531.82 40.15 531.87 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5985 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.0645 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 = 0.5223 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4777 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.0912 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 = 6.3839 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.0285 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.293 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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