Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 45.32 8.95 51.50 87.75 05Mar2018 9 a.m. 49.94 13.20 40.33 297.67 05Mar2018 10 a.m. 54.77 22.59 24.50 522.75 05Mar2018 11 a.m. 57.86 23.11 17.33 616.00 05Mar2018 12 p.m. 60.44 21.64 12.50 827.75 05Mar2018 1 p.m. 62.90 18.79 8.33 870.00 05Mar2018 2 p.m. 63.50 16.94 9.25 811.00 05Mar2018 3 p.m. 63.80 15.66 9.33 717.00 05Mar2018 4 p.m. 64.13 13.53 6.75 567.00 05Mar2018 5 p.m. 63.45 13.81 6.00 413.00 05Mar2018 6 p.m. 59.36 8.05 7.00 118.00 05Mar2018 7 p.m. 50.18 5.59 12.00 0.00 05Mar2018 8 p.m. 39.74 6.26 26.00 0.00 05Mar2018 9 p.m. 32.18 4.25 38.50 0.00 05Mar2018 10 p.m. 35.06 5.74 34.67 0.00 05Mar2018 11 p.m. 33.84 3.69 38.75 0.00 06Mar2018 12 a.m. 30.74 3.08 48.00 0.00 06Mar2018 1 a.m. 27.82 5.87 52.25 0.00 06Mar2018 2 a.m. 32.85 9.79 40.00 0.00 06Mar2018 3 a.m. 38.60 11.26 31.00 0.00 06Mar2018 4 a.m. 33.80 6.99 38.00 0.00 06Mar2018 5 a.m. 25.97 5.37 55.00 0.00 06Mar2018 6 a.m. 28.18 6.77 49.25 0.00 06Mar2018 7 a.m. 33.17 8.72 37.00 2.00 Accuml. Values 1087.60 259.65 693.24 5849.92 Num. Valid Values 24 24 24 24 Avg. Values 45.32 10.82 28.89 243.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.40 417.78 28.89 502.98 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.7111 definition: xcompl = 1 - (RELH_avg/100) TdC = -9.6668 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 = 0.5169 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4831 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.6723 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 = 7.3912 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.4858 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.276 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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