Detailed Weather Data for Project: BROK

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 16.59 0.26 76.02 17.00 01Jan2018 9 a.m. 16.16 1.19 74.43 43.00 01Jan2018 10 a.m. 18.01 1.00 68.44 352.00 01Jan2018 11 a.m. 19.24 1.63 59.28 464.00 01Jan2018 12 p.m. 20.77 3.43 58.67 523.00 01Jan2018 1 p.m. 23.07 1.13 50.61 530.00 01Jan2018 2 p.m. 25.16 1.11 48.60 475.00 01Jan2018 3 p.m. 26.04 2.98 45.97 367.00 01Jan2018 4 p.m. 27.59 0.48 45.30 184.00 01Jan2018 5 p.m. 27.14 0.70 49.69 38.00 01Jan2018 6 p.m. 24.40 0.71 44.99 0.00 01Jan2018 7 p.m. 25.16 0.79 35.29 0.00 01Jan2018 8 p.m. 22.62 0.77 51.03 0.00 01Jan2018 9 p.m. 21.65 0.95 52.93 0.00 01Jan2018 10 p.m. 20.55 1.04 47.01 0.00 01Jan2018 11 p.m. 20.55 0.53 54.95 0.00 02Jan2018 12 a.m. 19.00 0.64 47.44 0.00 02Jan2018 1 a.m. 18.68 0.41 55.20 0.00 02Jan2018 2 a.m. 17.47 0.68 52.51 0.00 02Jan2018 3 a.m. 16.27 0.56 47.99 0.00 02Jan2018 4 a.m. 15.62 0.33 49.09 0.00 02Jan2018 5 a.m. 15.71 0.22 55.13 0.00 02Jan2018 6 a.m. 15.39 0.19 51.11 0.00 02Jan2018 7 a.m. 15.28 0.56 50.06 0.00 Accuml. Values 488.14 22.29 1271.74 2993.00 Num. Valid Values 24 24 24 24 Avg. Values 20.34 0.93 52.99 124.71 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.48 35.86 52.99 257.34 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4701 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.5082 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 = 0.3061 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6939 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1753 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 = 1.7898 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8746 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.038 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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