Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 33.80 4.90 65.05 113.30 07Mar2018 9 a.m. 36.95 6.80 58.99 297.50 07Mar2018 10 a.m. 38.55 8.60 56.22 435.90 07Mar2018 11 a.m. 40.28 7.50 52.49 587.00 07Mar2018 12 p.m. 42.89 7.90 48.13 731.80 07Mar2018 1 p.m. 45.21 7.00 44.97 768.70 07Mar2018 2 p.m. 46.76 8.10 41.80 730.40 07Mar2018 3 p.m. 48.47 8.80 38.50 629.00 07Mar2018 4 p.m. 50.07 6.70 35.38 486.00 07Mar2018 5 p.m. 50.29 6.80 33.96 287.40 07Mar2018 6 p.m. 50.02 4.70 33.31 105.60 07Mar2018 7 p.m. 55.17 0.90 39.36 0.00 07Mar2018 8 p.m. 43.23 1.70 47.75 0.00 07Mar2018 9 p.m. 38.53 1.20 58.99 0.00 07Mar2018 10 p.m. 36.84 0.80 68.71 0.00 07Mar2018 11 p.m. 38.10 0.60 64.16 0.00 08Mar2018 12 a.m. 37.63 0.30 61.34 0.00 08Mar2018 1 a.m. 34.77 0.60 70.44 0.00 08Mar2018 2 a.m. 33.51 0.10 76.44 0.00 08Mar2018 3 a.m. 32.07 0.80 84.01 0.00 08Mar2018 4 a.m. 30.29 1.10 88.06 0.00 08Mar2018 5 a.m. 29.14 1.10 90.35 0.00 08Mar2018 6 a.m. 29.41 0.40 90.77 0.00 08Mar2018 7 a.m. 28.81 2.50 90.19 2.40 Accuml. Values 950.81 89.90 1439.37 5175.00 Num. Valid Values 24 24 24 24 Avg. Values 39.62 3.75 59.97 215.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.23 144.65 59.97 444.95 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4003 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.8233 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 = 3.6927 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 = 3.3176 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.4118 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.119 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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