Detailed Weather Data for Project: TRUS

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 7.27 6.35 63.28 0.00 01Jan2018 9 a.m. 10.67 7.40 55.33 32.00 01Jan2018 10 a.m. 13.66 7.96 48.62 239.00 01Jan2018 11 a.m. 15.73 7.33 44.52 425.00 01Jan2018 12 p.m. 17.38 6.97 37.86 560.00 01Jan2018 1 p.m. 19.69 5.80 34.51 637.00 01Jan2018 2 p.m. 22.77 4.08 33.16 643.00 01Jan2018 3 p.m. 22.77 3.54 32.06 580.00 01Jan2018 4 p.m. 24.42 3.46 31.15 459.00 01Jan2018 5 p.m. 23.31 3.43 31.63 294.00 01Jan2018 6 p.m. 20.89 4.15 36.70 95.00 01Jan2018 7 p.m. 24.08 2.80 40.79 0.00 01Jan2018 8 p.m. 16.93 4.89 44.15 0.00 01Jan2018 9 p.m. 16.93 2.38 45.43 0.00 01Jan2018 10 p.m. 15.06 3.22 48.85 0.00 01Jan2018 11 p.m. 17.15 3.07 47.51 0.00 02Jan2018 12 a.m. 12.33 3.30 54.41 0.00 02Jan2018 1 a.m. 12.33 4.52 55.87 0.00 02Jan2018 2 a.m. 10.45 4.09 59.61 0.00 02Jan2018 3 a.m. 9.46 4.70 64.25 0.00 02Jan2018 4 a.m. 8.04 4.74 67.97 0.00 02Jan2018 5 a.m. 7.93 5.68 71.15 0.00 02Jan2018 6 a.m. 7.59 5.35 71.81 0.00 02Jan2018 7 a.m. 7.48 5.26 72.55 0.00 Accuml. Values 364.33 114.47 1193.17 3964.00 Num. Valid Values 24 24 24 24 Avg. Values 15.18 4.77 49.72 165.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -9.34 184.18 49.72 340.82 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5028 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.9607 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 = 0.2658 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7342 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8923 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 = 1.5341 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3904 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.060 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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