Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 42.60 13.04 34.21 85.08 06Mar2018 9 a.m. 44.37 14.85 33.24 282.76 06Mar2018 10 a.m. 46.89 18.90 29.25 475.09 06Mar2018 11 a.m. 49.93 17.94 25.96 626.69 06Mar2018 12 p.m. 51.69 18.50 23.59 717.23 06Mar2018 1 p.m. 52.45 15.83 23.06 729.10 06Mar2018 2 p.m. 52.50 16.60 23.42 661.15 06Mar2018 3 p.m. 51.48 15.37 24.77 521.14 06Mar2018 4 p.m. 49.48 15.69 29.65 496.75 06Mar2018 5 p.m. 45.03 16.05 37.78 184.48 06Mar2018 6 p.m. 42.85 14.09 42.22 153.47 06Mar2018 7 p.m. 48.16 4.86 26.12 3.54 06Mar2018 8 p.m. 38.82 9.69 44.33 0.00 06Mar2018 9 p.m. 37.60 11.90 46.40 0.00 06Mar2018 10 p.m. 35.83 12.00 50.97 0.00 06Mar2018 11 p.m. 34.41 5.71 54.61 0.00 07Mar2018 12 a.m. 32.90 4.09 60.28 0.00 07Mar2018 1 a.m. 31.71 5.85 64.46 0.00 07Mar2018 2 a.m. 30.85 5.79 68.42 0.00 07Mar2018 3 a.m. 31.46 5.52 64.93 0.00 07Mar2018 4 a.m. 31.78 6.67 62.69 0.00 07Mar2018 5 a.m. 31.51 6.46 62.70 0.00 07Mar2018 6 a.m. 31.08 5.34 63.22 0.00 07Mar2018 7 a.m. 29.66 4.99 71.94 0.00 Accuml. Values 975.05 265.73 1068.22 4936.48 Num. Valid Values 24 24 24 24 Avg. Values 40.63 11.07 44.51 205.69 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.79 427.56 44.51 424.44 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5549 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.3673 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 = 0.4774 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5226 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.4776 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 = 4.8238 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.6294 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.202 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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