Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 5.95 11.35 62.50 6.25 01Jan2018 9 a.m. 7.82 12.38 61.33 122.67 01Jan2018 10 a.m. 11.03 13.03 54.00 312.00 01Jan2018 11 a.m. 14.24 9.69 47.33 454.33 01Jan2018 12 p.m. 17.47 7.27 41.50 559.75 01Jan2018 1 p.m. 19.76 8.43 38.00 596.67 01Jan2018 2 p.m. 21.47 6.43 35.00 571.50 01Jan2018 3 p.m. 22.06 4.87 33.50 485.50 01Jan2018 4 p.m. 23.05 4.53 32.50 349.25 01Jan2018 5 p.m. 22.06 5.09 33.00 157.50 01Jan2018 6 p.m. 14.36 6.04 45.00 0.00 01Jan2018 7 p.m. 11.84 6.93 54.00 0.00 01Jan2018 8 p.m. 14.36 6.26 50.00 0.00 01Jan2018 9 p.m. 11.57 5.26 55.50 0.00 01Jan2018 10 p.m. 8.30 7.08 62.33 0.00 01Jan2018 11 p.m. 8.11 7.89 66.75 0.00 02Jan2018 12 a.m. 8.02 6.82 70.00 0.00 02Jan2018 1 a.m. 7.21 7.10 72.75 0.00 02Jan2018 2 a.m. 7.21 6.65 71.75 0.00 02Jan2018 3 a.m. 9.92 5.74 70.67 0.00 02Jan2018 4 a.m. 6.68 6.93 75.33 0.00 02Jan2018 5 a.m. 5.18 7.61 79.00 0.00 02Jan2018 6 a.m. 7.16 6.49 76.75 0.00 02Jan2018 7 a.m. 9.86 4.36 73.00 0.00 Accuml. Values 294.69 174.23 1361.49 3615.42 Num. Valid Values 24 24 24 24 Avg. Values 12.28 7.26 56.73 150.64 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.96 280.34 56.73 310.85 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4327 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.8649 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 = 0.2442 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7558 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5637 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 = 1.1577 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4026 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.057 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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