Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 34.56 8.56 36.00 98.75 06Mar2018 9 a.m. 42.08 8.65 30.33 312.67 06Mar2018 10 a.m. 51.89 16.22 19.25 534.25 06Mar2018 11 a.m. 55.76 18.57 14.67 698.67 06Mar2018 12 p.m. 58.73 19.35 11.75 822.50 06Mar2018 1 p.m. 60.08 21.47 10.67 871.00 06Mar2018 2 p.m. 61.34 22.74 9.33 853.00 06Mar2018 3 p.m. 62.46 19.29 8.50 769.25 06Mar2018 4 p.m. 62.64 21.98 7.50 617.75 06Mar2018 5 p.m. 61.29 19.85 7.50 398.75 06Mar2018 6 p.m. 57.38 15.88 11.00 107.00 06Mar2018 7 p.m. 51.62 9.39 15.00 0.00 06Mar2018 8 p.m. 48.92 12.30 19.00 0.00 06Mar2018 9 p.m. 48.65 12.08 20.00 0.00 06Mar2018 10 p.m. 46.22 11.71 22.00 0.00 06Mar2018 11 p.m. 43.52 11.46 23.75 0.00 07Mar2018 12 a.m. 40.46 9.17 25.00 0.00 07Mar2018 1 a.m. 33.89 7.10 34.25 0.00 07Mar2018 2 a.m. 27.55 4.59 44.50 0.00 07Mar2018 3 a.m. 26.90 6.86 49.33 0.00 07Mar2018 4 a.m. 26.33 7.33 50.25 0.00 07Mar2018 5 a.m. 24.44 5.93 52.50 0.00 07Mar2018 6 a.m. 21.97 6.32 59.00 0.00 07Mar2018 7 a.m. 20.39 6.26 64.00 2.50 Accuml. Values 1069.07 303.06 645.08 6086.09 Num. Valid Values 24 24 24 24 Avg. Values 44.54 12.63 26.88 253.59 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.97 487.62 26.88 523.28 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.7312 definition: xcompl = 1 - (RELH_avg/100) TdC = -10.9332 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 = 0.5104 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4896 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.9077 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 = 7.3753 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.6432 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.304 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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