Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 42.39 8.05 96.75 10.50 02Dec2017 9 a.m. 42.56 10.22 87.67 133.67 02Dec2017 10 a.m. 48.51 9.95 77.75 289.75 02Dec2017 11 a.m. 54.98 12.45 69.33 439.00 02Dec2017 12 p.m. 60.44 10.01 61.75 511.50 02Dec2017 1 p.m. 62.90 8.05 57.67 528.33 02Dec2017 2 p.m. 64.52 5.29 54.33 487.67 02Dec2017 3 p.m. 66.24 6.38 52.50 383.00 02Dec2017 4 p.m. 66.83 7.10 52.25 278.25 02Dec2017 5 p.m. 64.08 6.71 56.00 111.00 02Dec2017 6 p.m. 52.52 3.58 76.00 0.00 02Dec2017 7 p.m. 45.86 3.80 84.00 0.00 02Dec2017 8 p.m. 49.64 7.38 82.00 0.00 02Dec2017 9 p.m. 47.75 6.93 87.00 0.00 02Dec2017 10 p.m. 46.28 5.14 91.00 0.00 02Dec2017 11 p.m. 46.04 5.76 92.50 0.00 03Dec2017 12 a.m. 42.84 4.36 96.00 0.00 03Dec2017 1 a.m. 46.22 4.59 95.00 0.00 03Dec2017 2 a.m. 42.35 4.36 97.00 0.00 03Dec2017 3 a.m. 44.12 4.85 97.67 0.00 03Dec2017 4 a.m. 41.99 4.53 97.50 0.00 03Dec2017 5 a.m. 41.18 4.14 98.50 0.00 03Dec2017 6 a.m. 42.26 4.59 98.00 0.00 03Dec2017 7 a.m. 43.61 1.57 97.00 0.00 Accuml. Values 1206.11 149.79 1955.17 3172.67 Num. Valid Values 24 24 24 24 Avg. Values 50.25 6.24 81.47 132.19 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.14 241.01 81.47 272.79 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1853 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.1222 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 = 0.5573 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4427 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.9459 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 = 2.2963 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3254 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.083 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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