Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 40.64 6.43 89.50 65.50 06Nov2017 9 a.m. 43.94 11.04 81.00 180.33 06Nov2017 10 a.m. 47.12 10.74 74.50 277.50 06Nov2017 11 a.m. 49.04 10.36 70.33 284.67 06Nov2017 12 p.m. 51.62 9.34 65.75 323.25 06Nov2017 1 p.m. 53.72 9.25 63.00 454.00 06Nov2017 2 p.m. 57.33 5.87 55.25 583.75 06Nov2017 3 p.m. -901.00 -901.00 -901.00 -901.00 06Nov2017 4 p.m. -901.00 -901.00 -901.00 -901.00 06Nov2017 5 p.m. 55.31 4.47 58.50 56.50 06Nov2017 6 p.m. 48.38 6.04 72.00 0.00 06Nov2017 7 p.m. 48.38 6.71 74.00 0.00 06Nov2017 8 p.m. 45.68 6.49 79.00 0.00 06Nov2017 9 p.m. 44.51 8.16 81.50 0.00 06Nov2017 10 p.m. 43.40 8.13 83.33 0.00 06Nov2017 11 p.m. 41.63 7.33 85.00 0.00 07Nov2017 12 a.m. 39.42 4.87 87.00 0.00 07Nov2017 1 a.m. 39.51 5.48 88.25 0.00 07Nov2017 2 a.m. 39.20 7.10 89.00 0.00 07Nov2017 3 a.m. 39.08 7.31 87.33 0.00 07Nov2017 4 a.m. 39.78 6.82 85.00 0.00 07Nov2017 5 a.m. 40.82 9.84 82.00 0.00 07Nov2017 6 a.m. 41.76 11.18 78.50 0.00 07Nov2017 7 a.m. 42.89 11.63 72.50 1.50 Accuml. Values 993.16 174.59 1702.24 2227.00 Num. Valid Values 22 22 22 22 Avg. Values 45.14 7.94 77.37 101.23 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.30 306.45 77.37 208.88 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2263 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.6294 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 = 0.5154 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4846 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0987 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 = 2.3105 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7346 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.074 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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