Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 43.38 1.85 97.50 9.75 03Dec2017 9 a.m. 46.16 2.54 96.33 49.33 03Dec2017 10 a.m. 50.36 6.04 89.50 115.00 03Dec2017 11 a.m. 58.04 8.95 69.33 296.33 03Dec2017 12 p.m. 63.90 10.29 55.50 426.25 03Dec2017 1 p.m. 70.58 12.97 47.33 551.67 03Dec2017 2 p.m. 75.60 15.15 44.00 511.25 03Dec2017 3 p.m. 77.13 17.84 44.25 413.50 03Dec2017 4 p.m. 76.05 18.85 46.00 282.50 03Dec2017 5 p.m. 73.35 16.33 51.25 112.00 03Dec2017 6 p.m. 66.74 9.17 64.00 0.00 03Dec2017 7 p.m. 61.34 9.39 75.00 0.00 03Dec2017 8 p.m. 61.16 10.96 79.00 0.00 03Dec2017 9 p.m. 60.98 10.07 82.00 0.00 03Dec2017 10 p.m. 59.81 9.39 87.00 0.00 03Dec2017 11 p.m. 60.35 11.46 88.25 0.00 04Dec2017 12 a.m. 59.22 11.35 91.25 0.00 04Dec2017 1 a.m. 57.42 9.17 94.25 0.00 04Dec2017 2 a.m. 56.12 9.00 97.00 0.00 04Dec2017 3 a.m. 56.48 11.63 98.00 0.00 04Dec2017 4 a.m. 56.88 10.74 97.75 0.00 04Dec2017 5 a.m. 56.21 8.61 97.50 0.00 04Dec2017 6 a.m. 53.78 6.65 99.00 0.00 04Dec2017 7 a.m. 52.70 5.26 99.00 0.00 Accuml. Values 1453.74 243.66 1889.99 2767.58 Num. Valid Values 24 24 24 24 Avg. Values 60.57 10.15 78.75 115.32 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.87 392.05 78.75 237.96 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2125 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.2263 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 = 0.6360 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3640 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7904 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 = 3.7995 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.0400 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.117 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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