Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 27.37 8.70 62.95 86.90 07Mar2018 9 a.m. 28.17 8.60 61.37 353.90 07Mar2018 10 a.m. 29.61 9.00 57.07 514.90 07Mar2018 11 a.m. 32.04 9.50 53.57 726.60 07Mar2018 12 p.m. 34.72 11.60 50.00 837.00 07Mar2018 1 p.m. 37.71 10.40 41.91 867.60 07Mar2018 2 p.m. 41.41 12.20 29.62 838.00 07Mar2018 3 p.m. 43.52 14.40 22.30 737.60 07Mar2018 4 p.m. 44.87 12.40 21.10 572.40 07Mar2018 5 p.m. 45.72 10.50 19.95 365.80 07Mar2018 6 p.m. 45.73 9.60 19.60 140.50 07Mar2018 7 p.m. 46.83 5.30 28.96 1.70 07Mar2018 8 p.m. 40.75 2.60 24.20 0.00 07Mar2018 9 p.m. 36.48 0.60 33.64 0.00 07Mar2018 10 p.m. 34.36 0.30 52.03 0.00 07Mar2018 11 p.m. 35.42 1.00 38.72 0.00 08Mar2018 12 a.m. 35.58 3.70 30.25 0.00 08Mar2018 1 a.m. 32.74 3.00 36.22 0.00 08Mar2018 2 a.m. 29.75 2.40 44.01 0.00 08Mar2018 3 a.m. 27.95 1.90 49.09 0.00 08Mar2018 4 a.m. 27.32 2.20 52.21 0.00 08Mar2018 5 a.m. 26.64 0.70 55.16 0.00 08Mar2018 6 a.m. 26.28 0.50 59.13 0.00 08Mar2018 7 a.m. 25.74 1.80 65.22 0.90 Accuml. Values 836.69 142.90 1008.28 6043.80 Num. Valid Values 24 24 24 24 Avg. Values 34.86 5.95 42.01 251.82 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.59 229.93 42.01 519.65 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5799 definition: xcompl = 1 - (RELH_avg/100) TdC = -10.0479 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 = 0.4281 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5719 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.4329 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 = 4.0266 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.7025 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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