Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 40.87 3.40 61.92 104.50 06Mar2018 9 a.m. 47.80 6.80 43.11 308.70 06Mar2018 10 a.m. 52.25 8.10 29.36 496.60 06Mar2018 11 a.m. 55.53 11.50 20.03 646.50 06Mar2018 12 p.m. 58.23 11.80 16.99 744.90 06Mar2018 1 p.m. 59.65 13.30 14.73 780.90 06Mar2018 2 p.m. 60.48 14.00 14.67 750.90 06Mar2018 3 p.m. 60.76 14.70 15.21 652.00 06Mar2018 4 p.m. 61.02 15.80 13.25 492.20 06Mar2018 5 p.m. 59.90 14.00 13.53 266.70 06Mar2018 6 p.m. 57.74 14.00 13.53 74.90 06Mar2018 7 p.m. 47.43 2.50 37.92 1.00 06Mar2018 8 p.m. 49.48 17.00 36.11 0.00 06Mar2018 9 p.m. 45.79 16.70 41.21 0.00 06Mar2018 10 p.m. 43.54 12.50 43.86 0.00 06Mar2018 11 p.m. 42.26 10.20 45.58 0.00 07Mar2018 12 a.m. 40.89 10.30 47.80 0.00 07Mar2018 1 a.m. 38.97 7.60 49.80 0.00 07Mar2018 2 a.m. 36.41 3.50 52.81 0.00 07Mar2018 3 a.m. 35.26 4.50 55.78 0.00 07Mar2018 4 a.m. 34.47 3.90 58.52 0.00 07Mar2018 5 a.m. 33.33 3.30 61.97 0.00 07Mar2018 6 a.m. 32.34 3.10 65.03 0.00 07Mar2018 7 a.m. 31.59 3.40 67.67 1.00 Accuml. Values 1125.97 225.90 920.39 5320.80 Num. Valid Values 24 24 24 24 Avg. Values 46.92 9.41 38.35 221.70 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.29 363.47 38.35 457.48 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6165 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.2076 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 = 0.5301 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4699 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.1421 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 = 6.8151 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.9794 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.234 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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