Detailed Weather Data for Project: BROK

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 31.86 0.60 89.24 3.00 31Dec2017 9 a.m. 31.08 0.99 89.00 6.00 31Dec2017 10 a.m. 31.64 0.54 90.53 21.00 31Dec2017 11 a.m. 30.00 1.18 90.42 29.00 31Dec2017 12 p.m. 28.13 3.33 92.17 39.00 31Dec2017 1 p.m. 26.69 1.74 87.05 42.00 31Dec2017 2 p.m. 26.80 2.14 89.79 66.00 31Dec2017 3 p.m. 26.15 0.51 86.62 66.00 31Dec2017 4 p.m. 25.93 0.79 76.36 103.00 31Dec2017 5 p.m. 27.03 2.63 71.66 43.00 31Dec2017 6 p.m. 27.03 1.12 65.99 1.00 31Dec2017 7 p.m. 23.95 0.54 49.57 0.00 31Dec2017 8 p.m. 25.93 0.55 55.92 1.00 31Dec2017 9 p.m. 25.16 0.38 57.93 0.00 31Dec2017 10 p.m. 24.06 0.51 59.34 0.00 31Dec2017 11 p.m. 22.86 0.53 53.17 0.00 01Jan2018 12 a.m. 22.08 1.05 58.79 0.00 01Jan2018 1 a.m. 21.43 1.32 69.60 0.00 01Jan2018 2 a.m. 20.77 0.84 65.81 0.00 01Jan2018 3 a.m. 19.56 0.24 70.76 0.00 01Jan2018 4 a.m. 19.00 0.15 73.87 0.00 01Jan2018 5 a.m. 18.01 0.26 71.61 0.00 01Jan2018 6 a.m. 17.37 0.15 72.90 0.00 01Jan2018 7 a.m. 16.59 1.48 79.31 0.00 Accuml. Values 589.13 23.57 1767.41 420.00 Num. Valid Values 24 24 24 24 Avg. Values 24.55 0.98 73.64 17.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -4.14 37.92 73.64 36.11 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2636 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.1274 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 = 0.3405 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6595 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.7322 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 = 1.1913 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.6182 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.006 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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