Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 25.45 7.70 84.44 78.50 07Mar2018 9 a.m. 30.38 10.80 75.19 278.00 07Mar2018 10 a.m. 34.92 13.50 64.67 467.70 07Mar2018 11 a.m. 38.53 15.60 52.11 618.90 07Mar2018 12 p.m. 42.03 15.80 37.11 718.10 07Mar2018 1 p.m. 44.98 16.10 30.11 761.60 07Mar2018 2 p.m. 46.87 13.80 27.47 739.70 07Mar2018 3 p.m. 48.85 14.00 25.71 656.50 07Mar2018 4 p.m. 50.00 13.30 24.97 523.90 07Mar2018 5 p.m. 50.79 14.20 24.08 347.60 07Mar2018 6 p.m. 50.50 9.80 25.40 150.30 07Mar2018 7 p.m. 52.88 7.40 36.09 5.30 07Mar2018 8 p.m. 45.41 5.00 30.13 0.00 07Mar2018 9 p.m. 43.39 4.00 42.76 0.00 07Mar2018 10 p.m. 41.32 2.70 56.15 0.00 07Mar2018 11 p.m. 40.05 4.70 56.70 0.10 08Mar2018 12 a.m. 38.17 6.90 51.80 0.10 08Mar2018 1 a.m. 37.20 9.30 57.32 0.10 08Mar2018 2 a.m. 34.45 4.00 58.80 0.20 08Mar2018 3 a.m. 31.62 2.70 62.19 0.20 08Mar2018 4 a.m. 31.95 2.80 60.67 0.00 08Mar2018 5 a.m. 30.22 2.50 64.77 0.00 08Mar2018 6 a.m. 30.40 5.30 65.06 0.00 08Mar2018 7 a.m. 30.60 4.90 73.00 0.00 Accuml. Values 950.95 206.80 1186.70 5346.80 Num. Valid Values 24 24 24 24 Avg. Values 39.62 8.62 49.45 222.78 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.23 332.74 49.45 459.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5055 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.4573 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 = 0.4688 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5312 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.8760 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 = 4.2179 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.9150 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.174 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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