Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 58.50 12.69 99.00 7.00 04Mar2018 9 a.m. 58.82 14.84 99.00 23.00 04Mar2018 10 a.m. 59.36 16.50 100.00 45.25 04Mar2018 11 a.m. 59.90 16.78 100.00 56.00 04Mar2018 12 p.m. 60.44 16.05 100.00 49.75 04Mar2018 1 p.m. 61.64 15.06 98.33 58.67 04Mar2018 2 p.m. 63.36 15.15 95.75 132.50 04Mar2018 3 p.m. 68.49 20.47 83.75 487.75 04Mar2018 4 p.m. 72.41 21.36 71.00 524.75 04Mar2018 5 p.m. 71.96 22.54 69.75 302.75 04Mar2018 6 p.m. 70.16 21.92 72.00 85.00 04Mar2018 7 p.m. 66.38 20.58 80.00 0.00 04Mar2018 8 p.m. 65.12 19.68 83.00 0.00 04Mar2018 9 p.m. 63.50 16.11 86.00 0.00 04Mar2018 10 p.m. 61.88 16.11 91.50 0.00 04Mar2018 11 p.m. 59.85 11.86 95.50 0.00 05Mar2018 12 a.m. 57.96 8.78 96.25 0.00 05Mar2018 1 a.m. 55.40 9.17 96.75 0.00 05Mar2018 2 a.m. 52.34 5.14 97.75 0.00 05Mar2018 3 a.m. 52.10 8.57 94.00 0.00 05Mar2018 4 a.m. 48.29 6.60 74.50 0.00 05Mar2018 5 a.m. 48.65 8.95 53.50 0.00 05Mar2018 6 a.m. 46.26 10.96 57.25 0.00 05Mar2018 7 a.m. 45.23 10.29 53.00 2.00 Accuml. Values 1428.00 346.16 2047.58 1774.42 Num. Valid Values 24 24 24 24 Avg. Values 59.50 14.42 85.32 73.93 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.28 556.97 85.32 152.56 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1468 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.8294 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 = 0.6282 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3718 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7145 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 = 2.5489 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.6367 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.086 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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