Detailed Weather Data for Project: BROK

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 49.44 0.56 63.19 31.00 02Dec2017 9 a.m. 54.05 1.42 57.75 121.00 02Dec2017 10 a.m. 56.48 2.03 57.14 133.00 02Dec2017 11 a.m. 59.99 1.24 52.92 331.00 02Dec2017 12 p.m. 62.74 1.77 52.32 473.00 02Dec2017 1 p.m. 65.61 2.61 49.57 493.00 02Dec2017 2 p.m. 68.45 2.03 48.65 401.00 02Dec2017 3 p.m. 70.77 2.49 49.15 275.00 02Dec2017 4 p.m. 72.41 1.71 49.14 162.00 02Dec2017 5 p.m. 69.33 0.92 55.43 32.00 02Dec2017 6 p.m. 65.80 0.13 62.87 0.00 02Dec2017 7 p.m. 65.59 2.32 61.96 0.00 02Dec2017 8 p.m. 62.10 0.63 69.60 0.00 02Dec2017 9 p.m. 59.45 0.38 74.85 0.00 02Dec2017 10 p.m. 56.80 0.35 81.49 0.00 02Dec2017 11 p.m. 55.49 0.79 83.76 0.00 03Dec2017 12 a.m. 57.04 0.35 79.61 0.00 03Dec2017 1 a.m. 56.26 0.73 81.68 0.00 03Dec2017 2 a.m. 55.17 0.31 86.51 0.00 03Dec2017 3 a.m. 54.50 0.44 87.06 0.00 03Dec2017 4 a.m. 53.73 1.58 88.45 1.00 03Dec2017 5 a.m. 53.19 0.35 90.42 0.00 03Dec2017 6 a.m. 53.17 0.14 90.71 0.00 03Dec2017 7 a.m. 51.96 0.41 94.01 0.00 Accuml. Values 1429.52 25.69 1668.24 2453.00 Num. Valid Values 24 24 24 24 Avg. Values 59.56 1.07 69.51 102.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.31 41.34 69.51 210.91 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3049 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.8420 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 = 0.6287 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3713 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4259 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 = 5.2504 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3230 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.069 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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