Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 1.63 7.05 68.75 5.00 01Jan2018 9 a.m. 2.90 6.19 66.67 109.67 01Jan2018 10 a.m. 6.13 7.44 59.00 273.50 01Jan2018 11 a.m. 10.04 7.46 51.33 412.33 01Jan2018 12 p.m. 13.46 6.82 44.50 511.25 01Jan2018 1 p.m. 15.80 5.22 40.67 537.33 01Jan2018 2 p.m. 18.55 5.54 36.50 523.25 01Jan2018 3 p.m. 20.53 6.77 35.00 424.50 01Jan2018 4 p.m. 20.17 7.27 34.00 276.00 01Jan2018 5 p.m. 18.46 5.76 35.75 133.75 01Jan2018 6 p.m. 14.54 7.61 43.00 0.00 01Jan2018 7 p.m. 14.00 9.39 47.00 0.00 01Jan2018 8 p.m. 12.02 9.39 49.00 0.00 01Jan2018 9 p.m. 11.39 8.84 51.00 0.00 01Jan2018 10 p.m. 10.88 8.50 54.00 0.00 01Jan2018 11 p.m. 9.59 6.99 57.25 0.00 02Jan2018 12 a.m. 9.14 7.33 58.25 0.00 02Jan2018 1 a.m. 8.60 5.82 60.75 0.00 02Jan2018 2 a.m. 9.01 6.49 63.00 0.00 02Jan2018 3 a.m. 10.04 7.53 62.00 0.00 02Jan2018 4 a.m. 10.63 6.10 61.25 0.00 02Jan2018 5 a.m. 11.84 6.49 62.50 0.00 02Jan2018 6 a.m. 11.44 5.76 60.75 0.00 02Jan2018 7 a.m. 11.66 3.24 60.50 0.00 Accuml. Values 282.45 165.00 1262.42 3206.58 Num. Valid Values 24 24 24 24 Avg. Values 11.77 6.88 52.60 133.61 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -11.24 265.49 52.60 275.70 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4740 definition: xcompl = 1 - (RELH_avg/100) TdC = -19.0410 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 = 0.2405 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7595 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2351 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 = 1.2420 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4399 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.055 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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