Detailed Weather Data for Project: BROK

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 47.59 3.14 49.82 22.00 05Dec2017 9 a.m. 46.71 3.42 55.07 132.00 05Dec2017 10 a.m. 46.92 2.16 50.98 195.00 05Dec2017 11 a.m. 47.80 2.33 44.44 180.00 05Dec2017 12 p.m. 48.47 1.19 46.95 144.00 05Dec2017 1 p.m. 49.12 1.40 41.33 264.00 05Dec2017 2 p.m. 47.48 2.39 43.10 131.00 05Dec2017 3 p.m. 46.49 1.61 50.31 101.00 05Dec2017 4 p.m. 46.49 1.35 44.81 102.00 05Dec2017 5 p.m. 45.82 1.50 42.31 24.00 05Dec2017 6 p.m. 45.50 0.32 45.24 0.00 05Dec2017 7 p.m. 44.94 0.45 52.08 0.00 05Dec2017 8 p.m. 43.30 0.59 43.22 0.00 05Dec2017 9 p.m. 42.51 1.11 46.64 0.00 05Dec2017 10 p.m. 41.86 0.59 47.13 0.00 05Dec2017 11 p.m. 42.96 2.13 50.61 0.00 06Dec2017 12 a.m. 42.21 2.69 46.58 0.00 06Dec2017 1 a.m. 42.96 1.45 47.56 0.00 06Dec2017 2 a.m. 42.40 1.63 57.32 0.00 06Dec2017 3 a.m. 40.87 0.73 53.66 0.00 06Dec2017 4 a.m. 38.03 0.19 58.97 0.00 06Dec2017 5 a.m. 41.09 2.07 43.59 0.00 06Dec2017 6 a.m. 39.99 0.32 54.15 0.00 06Dec2017 7 a.m. 42.96 1.55 53.84 0.00 Accuml. Values 1064.50 36.31 1169.71 1295.00 Num. Valid Values 24 24 24 24 Avg. Values 44.35 1.51 48.74 53.96 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.86 58.42 48.74 111.34 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5126 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.2263 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 = 0.5088 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4912 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0587 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 = 5.1278 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.4841 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.049 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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