Detailed Weather Data for Project: HUGO

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 39.72 15.20 62.40 98.10 07Mar2018 9 a.m. 39.92 15.50 62.08 300.10 07Mar2018 10 a.m. 40.60 13.40 59.00 496.60 07Mar2018 11 a.m. 42.04 12.10 55.57 662.90 07Mar2018 12 p.m. 44.08 10.50 51.41 788.10 07Mar2018 1 p.m. 47.08 15.90 48.13 815.40 07Mar2018 2 p.m. 48.87 14.20 44.43 788.70 07Mar2018 3 p.m. 51.13 13.60 41.24 698.00 07Mar2018 4 p.m. 53.08 12.30 38.55 540.80 07Mar2018 5 p.m. 54.39 10.40 37.22 339.10 07Mar2018 6 p.m. 54.36 10.60 38.58 114.40 07Mar2018 7 p.m. 60.98 4.20 28.61 2.20 07Mar2018 8 p.m. 51.75 7.10 45.93 0.00 07Mar2018 9 p.m. 49.89 3.70 47.99 0.00 07Mar2018 10 p.m. 44.42 1.60 65.91 0.00 07Mar2018 11 p.m. 41.22 2.20 80.56 0.00 08Mar2018 12 a.m. 39.09 2.60 93.12 0.00 08Mar2018 1 a.m. 37.31 3.10 97.67 0.00 08Mar2018 2 a.m. 36.79 1.80 97.90 0.00 08Mar2018 3 a.m. 35.83 2.00 97.24 0.00 08Mar2018 4 a.m. 35.04 2.30 100.08 0.00 08Mar2018 5 a.m. 36.18 1.50 97.30 0.00 08Mar2018 6 a.m. 36.79 1.30 90.94 0.00 08Mar2018 7 a.m. 34.14 2.40 97.59 0.30 Accuml. Values 1054.70 179.50 1579.45 5644.70 Num. Valid Values 24 24 24 24 Avg. Values 43.95 7.48 65.81 235.20 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.64 288.82 65.81 485.33 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3419 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.7435 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 = 0.5054 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4946 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.3793 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 = 3.3341 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.6287 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.158 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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