Detailed Weather Data for Project: WAUR

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 68.68 0.00 93.16 19.00 04Dec2017 9 a.m. 70.97 0.00 88.39 117.00 04Dec2017 10 a.m. 73.74 0.00 79.84 114.00 04Dec2017 11 a.m. 77.23 0.00 67.03 315.00 04Dec2017 12 p.m. 79.66 0.00 54.46 462.00 04Dec2017 1 p.m. 81.66 0.00 43.05 418.00 04Dec2017 2 p.m. 83.21 0.00 38.47 479.00 04Dec2017 3 p.m. 83.32 0.00 35.84 403.00 04Dec2017 4 p.m. 80.91 0.00 31.26 232.00 04Dec2017 5 p.m. 77.49 0.00 33.52 81.00 04Dec2017 6 p.m. 69.24 0.00 47.62 8.00 04Dec2017 7 p.m. 80.76 0.00 53.29 0.00 04Dec2017 8 p.m. 64.40 0.00 32.96 0.00 04Dec2017 9 p.m. 61.75 0.00 39.80 0.00 04Dec2017 10 p.m. 59.77 0.00 45.78 0.00 04Dec2017 11 p.m. 57.24 0.00 41.39 0.00 05Dec2017 12 a.m. 54.05 0.00 46.15 0.00 05Dec2017 1 a.m. 52.18 0.00 42.42 0.00 05Dec2017 2 a.m. 50.86 0.00 46.70 0.00 05Dec2017 3 a.m. 49.87 0.00 46.27 0.00 05Dec2017 4 a.m. 48.78 0.00 46.64 0.00 05Dec2017 5 a.m. 46.80 0.00 45.48 0.00 05Dec2017 6 a.m. 45.37 0.00 32.72 0.00 05Dec2017 7 a.m. 45.48 0.00 29.12 0.00 Accuml. Values 1563.44 0.00 1161.36 2648.00 Num. Valid Values 24 0 24 24 Avg. Values 65.14 48.39 110.33 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.41 0.00 48.39 227.68 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5161 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.3210 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 = 0.6679 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3321 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7791 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 = 10.9407 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.4483 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.092 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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