Detailed Weather Data for Project: TRUS

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 59.68 13.07 89.14 2.00 04Dec2017 9 a.m. 61.56 11.65 86.40 115.00 04Dec2017 10 a.m. 65.52 15.66 72.78 285.00 04Dec2017 11 a.m. 68.04 20.46 60.08 397.00 04Dec2017 12 p.m. 73.31 14.15 34.01 471.00 04Dec2017 1 p.m. 74.84 15.97 31.56 488.00 04Dec2017 2 p.m. 78.48 12.88 17.46 463.00 04Dec2017 3 p.m. 79.68 17.88 16.55 381.00 04Dec2017 4 p.m. 77.36 11.79 17.46 280.00 04Dec2017 5 p.m. 76.82 9.88 18.50 174.00 04Dec2017 6 p.m. 67.26 5.03 27.48 32.00 04Dec2017 7 p.m. 43.32 2.19 27.48 0.00 04Dec2017 8 p.m. 59.79 12.74 26.93 0.00 04Dec2017 9 p.m. 56.82 13.45 21.55 0.00 04Dec2017 10 p.m. 53.85 17.43 24.00 0.00 04Dec2017 11 p.m. 52.00 15.54 30.96 0.00 05Dec2017 12 a.m. 49.14 20.45 35.90 0.00 05Dec2017 1 a.m. 46.94 14.87 39.38 0.00 05Dec2017 2 a.m. 45.72 9.28 40.48 0.00 05Dec2017 3 a.m. 44.08 13.64 43.72 0.00 05Dec2017 4 a.m. 43.30 11.29 40.66 0.00 05Dec2017 5 a.m. 41.88 13.87 38.53 0.00 05Dec2017 6 a.m. 41.11 10.92 30.71 0.00 05Dec2017 7 a.m. 40.89 10.18 27.66 0.00 Accuml. Values 1401.38 314.27 899.38 3088.00 Num. Valid Values 24 24 24 24 Avg. Values 58.39 13.09 37.47 128.67 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.66 505.66 37.47 265.51 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6253 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.1851 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 = 0.6201 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3799 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.0802 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 = 10.5090 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 14.9489 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.274 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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