Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 28.20 5.52 77.10 85.31 07Mar2018 9 a.m. 31.51 6.96 66.06 281.40 07Mar2018 10 a.m. 34.41 8.88 57.45 488.98 07Mar2018 11 a.m. 37.62 6.07 52.79 635.52 07Mar2018 12 p.m. 40.46 6.68 49.48 721.00 07Mar2018 1 p.m. 43.86 8.37 41.41 774.69 07Mar2018 2 p.m. 47.08 8.13 31.77 752.48 07Mar2018 3 p.m. 49.14 8.13 25.50 666.81 07Mar2018 4 p.m. 50.45 8.84 22.31 525.95 07Mar2018 5 p.m. 51.10 7.85 22.42 343.61 07Mar2018 6 p.m. 50.61 7.82 22.19 139.13 07Mar2018 7 p.m. 50.32 4.84 32.91 1.70 07Mar2018 8 p.m. 45.12 1.49 34.13 0.00 07Mar2018 9 p.m. 42.01 1.17 36.26 0.00 07Mar2018 10 p.m. 39.31 0.22 33.59 0.00 07Mar2018 11 p.m. 37.35 0.14 52.88 0.00 08Mar2018 12 a.m. 35.96 0.08 66.92 0.00 08Mar2018 1 a.m. 34.16 1.12 63.13 0.00 08Mar2018 2 a.m. 34.59 2.45 56.37 0.00 08Mar2018 3 a.m. 34.48 2.67 52.84 0.00 08Mar2018 4 a.m. 32.83 0.69 57.81 0.00 08Mar2018 5 a.m. 31.71 0.64 59.48 0.00 08Mar2018 6 a.m. 30.69 1.07 62.23 0.00 08Mar2018 7 a.m. 27.64 1.04 62.71 0.00 Accuml. Values 940.62 100.87 1139.74 5416.58 Num. Valid Values 24 24 24 24 Avg. Values 39.19 4.20 47.49 225.69 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.00 162.30 47.49 465.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5251 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.2249 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 = 0.4652 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5348 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.9341 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 = 4.3130 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.2235 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.140 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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