Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 41.88 37.01 43.72 158.00 06Mar2018 9 a.m. 42.42 40.32 46.09 372.00 06Mar2018 10 a.m. 40.78 38.12 50.80 471.00 06Mar2018 11 a.m. 40.23 39.16 53.55 621.00 06Mar2018 12 p.m. 38.59 37.26 65.76 388.00 06Mar2018 1 p.m. 37.36 35.45 71.00 330.00 06Mar2018 2 p.m. 34.84 31.25 77.79 206.00 06Mar2018 3 p.m. 35.49 33.20 75.40 444.00 06Mar2018 4 p.m. 36.37 31.43 62.46 140.00 06Mar2018 5 p.m. 37.49 31.68 53.67 329.00 06Mar2018 6 p.m. 35.73 29.58 57.64 115.00 06Mar2018 7 p.m. 42.96 7.45 37.48 1.00 06Mar2018 8 p.m. 33.64 19.77 62.83 0.00 06Mar2018 9 p.m. 32.54 17.72 66.37 0.00 06Mar2018 10 p.m. 31.77 16.74 65.88 0.00 06Mar2018 11 p.m. 31.33 18.27 69.85 0.00 07Mar2018 12 a.m. 29.68 18.86 71.56 0.00 07Mar2018 1 a.m. 29.46 19.25 74.13 0.00 07Mar2018 2 a.m. 29.46 19.56 74.98 0.00 07Mar2018 3 a.m. 29.01 18.45 77.85 1.00 07Mar2018 4 a.m. 29.35 16.00 80.73 0.00 07Mar2018 5 a.m. 29.68 16.79 82.00 1.00 07Mar2018 6 a.m. 27.70 16.06 86.34 0.00 07Mar2018 7 a.m. 25.50 18.22 91.22 4.00 Accuml. Values 823.28 607.60 1599.10 3581.00 Num. Valid Values 24 24 24 24 Avg. Values 34.30 25.32 66.63 149.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.28 977.63 66.63 307.89 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3337 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.2115 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 = 0.4233 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5767 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.9458 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 = 2.2403 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.6196 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.183 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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