Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 29.82 5.80 70.77 49.00 07Mar2018 9 a.m. 31.91 7.40 65.77 183.70 07Mar2018 10 a.m. 34.07 9.80 58.94 450.60 07Mar2018 11 a.m. 36.01 9.40 55.70 652.10 07Mar2018 12 p.m. 38.50 7.90 50.19 778.60 07Mar2018 1 p.m. 40.98 8.40 45.36 828.70 07Mar2018 2 p.m. 43.52 8.10 41.04 814.80 07Mar2018 3 p.m. 46.22 9.20 36.81 732.00 07Mar2018 4 p.m. 48.58 9.20 33.15 588.00 07Mar2018 5 p.m. 49.50 8.40 31.23 389.70 07Mar2018 6 p.m. 49.93 5.50 29.97 161.00 07Mar2018 7 p.m. 53.87 2.70 35.04 2.20 07Mar2018 8 p.m. 42.57 0.20 49.81 0.00 07Mar2018 9 p.m. 38.08 0.00 60.72 0.00 07Mar2018 10 p.m. 35.35 0.10 73.83 0.00 07Mar2018 11 p.m. 33.40 0.00 87.95 0.00 08Mar2018 12 a.m. 31.41 0.70 93.56 0.00 08Mar2018 1 a.m. 30.20 0.40 98.46 0.00 08Mar2018 2 a.m. 28.87 0.20 98.54 0.00 08Mar2018 3 a.m. 28.00 0.20 98.67 0.00 08Mar2018 4 a.m. 28.11 0.50 99.11 0.00 08Mar2018 5 a.m. 27.55 0.10 99.26 0.00 08Mar2018 6 a.m. 27.10 0.00 99.53 0.00 08Mar2018 7 a.m. 26.42 0.70 99.56 0.00 Accuml. Values 879.98 94.90 1612.97 5630.40 Num. Valid Values 24 21 24 24 Avg. Values 36.67 4.52 67.21 234.60 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.59 174.51 67.21 484.10 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3279 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.8393 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 = 0.4435 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5565 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.0635 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 = 2.4157 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0125 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.115 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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