Detailed Weather Data for Project: FCOB

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 25.03 5.26 74.75 5.25 06Dec2017 9 a.m. 29.96 7.68 65.67 116.00 06Dec2017 10 a.m. 38.39 7.16 46.75 341.00 06Dec2017 11 a.m. 43.76 9.10 40.33 471.67 06Dec2017 12 p.m. 48.83 9.23 33.25 556.25 06Dec2017 1 p.m. 51.44 8.87 31.67 575.33 06Dec2017 2 p.m. 53.06 12.19 30.50 534.75 06Dec2017 3 p.m. 53.46 11.74 28.00 434.50 06Dec2017 4 p.m. 53.46 11.07 24.50 284.00 06Dec2017 5 p.m. 51.71 10.74 27.25 108.25 06Dec2017 6 p.m. 46.58 6.93 35.00 0.00 06Dec2017 7 p.m. 43.88 6.26 40.00 0.00 06Dec2017 8 p.m. 39.83 3.58 43.50 0.00 06Dec2017 9 p.m. 35.06 4.10 49.33 0.00 06Dec2017 10 p.m. 32.81 4.47 51.50 0.00 06Dec2017 11 p.m. 30.65 5.37 56.75 0.00 07Dec2017 12 a.m. 27.82 4.64 63.50 0.00 07Dec2017 1 a.m. 27.37 5.42 64.75 0.00 07Dec2017 2 a.m. 34.16 14.76 59.00 0.00 07Dec2017 3 a.m. 33.14 15.81 66.33 0.00 07Dec2017 4 a.m. 32.13 17.22 65.25 0.00 07Dec2017 5 a.m. 30.92 16.33 68.00 0.00 07Dec2017 6 a.m. 28.36 18.51 67.75 0.00 07Dec2017 7 a.m. 26.15 18.01 63.50 0.00 Accuml. Values 917.96 234.45 1196.83 3427.00 Num. Valid Values 24 24 24 24 Avg. Values 38.25 9.77 49.87 142.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.47 377.23 49.87 294.65 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5013 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.0489 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 = 0.4571 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5429 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8943 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 = 3.9644 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.0876 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.143 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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