Detailed Weather Data for Project: BROK

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 31.64 0.33 54.27 9.00 29Dec2017 9 a.m. 32.52 0.74 52.01 53.00 29Dec2017 10 a.m. 33.84 1.46 51.70 84.00 29Dec2017 11 a.m. 35.92 1.15 50.12 139.00 29Dec2017 12 p.m. 37.69 2.37 48.60 182.00 29Dec2017 1 p.m. 39.54 3.69 50.05 233.00 29Dec2017 2 p.m. 40.53 2.15 51.15 116.00 29Dec2017 3 p.m. 40.87 2.92 53.47 102.00 29Dec2017 4 p.m. 41.52 0.75 55.12 47.00 29Dec2017 5 p.m. 40.98 0.12 57.75 13.00 29Dec2017 6 p.m. 40.53 0.80 62.93 0.00 29Dec2017 7 p.m. 38.12 0.15 84.36 0.00 29Dec2017 8 p.m. 40.42 1.14 64.52 0.00 29Dec2017 9 p.m. 40.44 0.06 66.67 0.00 29Dec2017 10 p.m. 40.21 0.41 74.66 0.00 29Dec2017 11 p.m. 39.99 0.79 81.43 0.00 30Dec2017 12 a.m. 39.67 0.00 84.91 0.00 30Dec2017 1 a.m. 39.33 0.54 89.79 0.00 30Dec2017 2 a.m. 38.79 0.18 92.97 0.00 30Dec2017 3 a.m. 39.22 0.09 90.34 0.00 30Dec2017 4 a.m. 39.22 0.54 89.79 0.00 30Dec2017 5 a.m. 39.43 0.55 89.98 0.00 30Dec2017 6 a.m. 40.98 0.11 87.90 0.00 30Dec2017 7 a.m. 41.52 0.70 83.93 0.00 Accuml. Values 932.93 21.74 1668.42 978.00 Num. Valid Values 24 23 24 24 Avg. Values 38.87 0.95 69.52 40.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.82 36.50 69.52 84.09 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3048 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.2069 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 = 0.4624 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5376 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2533 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 = 2.4460 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1553 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.020 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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