Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 57.42 21.31 93.25 13.75 04Dec2017 9 a.m. 58.64 16.78 89.00 140.00 04Dec2017 10 a.m. 62.37 16.33 71.50 293.00 04Dec2017 11 a.m. 67.52 13.27 48.33 374.67 04Dec2017 12 p.m. 70.11 14.32 36.25 410.00 04Dec2017 1 p.m. 74.42 19.46 23.67 436.00 04Dec2017 2 p.m. 69.08 19.63 27.00 336.00 04Dec2017 3 p.m. 64.94 17.67 29.75 256.75 04Dec2017 4 p.m. 62.87 14.93 23.50 133.50 04Dec2017 5 p.m. 60.66 14.37 20.00 50.50 04Dec2017 6 p.m. 54.32 17.22 22.00 0.00 04Dec2017 7 p.m. 51.80 14.54 27.00 0.00 04Dec2017 8 p.m. 50.81 18.57 30.00 0.00 04Dec2017 9 p.m. 47.78 16.55 37.33 0.00 04Dec2017 10 p.m. 44.84 11.93 42.00 0.00 04Dec2017 11 p.m. 42.08 9.84 45.00 0.00 05Dec2017 12 a.m. 40.95 10.96 48.25 0.00 05Dec2017 1 a.m. 40.68 11.41 49.25 0.00 05Dec2017 2 a.m. 40.59 14.04 47.75 0.00 05Dec2017 3 a.m. 39.38 12.60 45.00 0.00 05Dec2017 4 a.m. 38.07 12.81 42.75 0.00 05Dec2017 5 a.m. 36.59 11.30 38.50 0.00 05Dec2017 6 a.m. 35.24 12.02 36.50 0.00 05Dec2017 7 a.m. 34.61 8.50 34.00 0.00 Accuml. Values 1245.77 350.36 1007.58 2444.17 Num. Valid Values 24 24 24 24 Avg. Values 51.91 14.60 41.98 101.84 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.06 563.73 41.98 210.15 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5802 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.4657 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 = 0.5704 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4296 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2475 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 = 7.7099 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 12.3987 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.238 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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