Detailed Weather Data for Project: FGIB

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. -24.29 6.31 8.97 5.00 04Dec2017 9 a.m. -24.29 4.29 8.97 20.00 04Dec2017 10 a.m. -24.84 4.30 8.91 33.00 04Dec2017 11 a.m. -24.50 3.57 8.97 54.00 04Dec2017 12 p.m. -24.29 4.70 8.97 106.00 04Dec2017 1 p.m. -24.39 5.06 8.97 284.00 04Dec2017 2 p.m. -24.18 3.58 8.91 245.00 04Dec2017 3 p.m. -24.50 3.87 8.85 173.00 04Dec2017 4 p.m. -24.07 2.76 8.97 126.00 04Dec2017 5 p.m. -23.75 2.72 9.10 45.00 04Dec2017 6 p.m. -23.96 1.65 9.10 1.00 04Dec2017 7 p.m. -24.39 0.48 8.91 0.00 04Dec2017 8 p.m. -23.40 0.51 9.34 0.00 04Dec2017 9 p.m. -23.96 0.11 9.22 0.00 04Dec2017 10 p.m. -25.06 1.13 8.91 0.00 04Dec2017 11 p.m. -24.61 1.10 9.03 0.00 05Dec2017 12 a.m. -23.85 0.03 9.03 0.00 05Dec2017 1 a.m. -23.51 2.46 9.22 0.00 05Dec2017 2 a.m. -24.07 3.58 8.85 0.00 05Dec2017 3 a.m. -24.84 3.60 8.79 0.00 05Dec2017 4 a.m. -23.75 2.27 8.97 1.00 05Dec2017 5 a.m. -24.84 1.80 8.97 0.00 05Dec2017 6 a.m. -23.40 3.19 9.10 0.00 05Dec2017 7 a.m. -23.30 0.11 8.97 0.00 Accuml. Values -580.06 63.18 216.00 1093.00 Num. Valid Values 24 24 24 24 Avg. Values -24.17 2.63 9.00 45.54 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -31.20 101.66 9.00 93.98 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.9100 definition: xcompl = 1 - (RELH_avg/100) TdC = -53.4293 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 = 0.0605 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.9395 definition: del_lambda2 = 1 - del_lambda1 Qn = -1.#IND 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 = 0.3869 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.3099 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: -1.#IO inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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