Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 44.01 5.54 98.25 71.25 03Mar2018 9 a.m. 51.50 9.54 88.33 261.00 03Mar2018 10 a.m. 58.95 16.78 74.25 470.75 03Mar2018 11 a.m. 63.38 17.37 66.00 505.33 03Mar2018 12 p.m. 67.82 17.50 58.00 704.75 03Mar2018 1 p.m. 70.70 19.01 53.00 531.33 03Mar2018 2 p.m. 74.30 18.45 45.25 770.25 03Mar2018 3 p.m. 75.56 21.31 40.25 697.75 03Mar2018 4 p.m. 76.14 21.19 38.00 556.25 03Mar2018 5 p.m. 74.30 22.76 39.75 367.75 03Mar2018 6 p.m. 69.26 18.79 48.00 79.00 03Mar2018 7 p.m. 64.40 16.78 63.00 0.00 03Mar2018 8 p.m. 63.77 17.67 65.50 0.00 03Mar2018 9 p.m. 62.90 18.12 67.33 0.00 03Mar2018 10 p.m. 62.60 19.83 70.33 0.00 03Mar2018 11 p.m. 61.34 17.22 78.00 0.00 04Mar2018 12 a.m. 60.89 15.60 78.75 0.00 04Mar2018 1 a.m. 59.63 14.93 81.75 0.00 04Mar2018 2 a.m. 58.86 13.81 84.75 0.00 04Mar2018 3 a.m. 59.84 13.27 83.00 0.00 04Mar2018 4 a.m. 59.99 11.91 84.25 0.00 04Mar2018 5 a.m. 59.27 13.31 88.00 0.00 04Mar2018 6 a.m. 58.14 12.08 95.50 0.00 04Mar2018 7 a.m. 58.19 12.64 98.50 0.00 Accuml. Values 1515.74 385.41 1687.74 5015.41 Num. Valid Values 24 24 24 24 Avg. Values 63.16 16.06 70.32 208.98 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.31 620.12 70.32 431.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2968 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.9344 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 = 0.6543 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3457 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.5066 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 = 5.7929 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.4083 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.258 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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