Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 36.59 5.26 93.00 23.25 06Nov2017 9 a.m. 39.80 6.26 89.67 96.33 06Nov2017 10 a.m. 43.56 8.22 85.00 133.75 06Nov2017 11 a.m. 45.38 8.20 79.33 182.00 06Nov2017 12 p.m. 48.78 8.11 69.25 492.00 06Nov2017 1 p.m. 51.86 8.57 61.00 563.67 06Nov2017 2 p.m. 54.20 9.47 55.33 549.00 06Nov2017 3 p.m. -901.00 -901.00 -901.00 -901.00 06Nov2017 4 p.m. -901.00 -901.00 -901.00 -901.00 06Nov2017 5 p.m. -901.00 -901.00 -901.00 -901.00 06Nov2017 6 p.m. 46.22 6.49 71.00 0.00 06Nov2017 7 p.m. 44.42 6.26 73.00 0.00 06Nov2017 8 p.m. 41.72 4.92 78.00 0.00 06Nov2017 9 p.m. 41.36 7.05 79.00 0.00 06Nov2017 10 p.m. 40.52 5.74 78.67 0.00 06Nov2017 11 p.m. 37.89 2.29 82.75 0.00 07Nov2017 12 a.m. 35.24 4.64 88.25 0.00 07Nov2017 1 a.m. 35.19 6.38 90.25 0.00 07Nov2017 2 a.m. 34.92 4.75 89.75 0.00 07Nov2017 3 a.m. 35.72 4.85 90.00 0.00 07Nov2017 4 a.m. 37.76 7.27 85.00 0.00 07Nov2017 5 a.m. 37.31 6.26 84.00 0.00 07Nov2017 6 a.m. 35.69 7.27 80.75 0.00 07Nov2017 7 a.m. 34.34 6.93 78.00 1.50 Accuml. Values 858.47 135.19 1681.00 2041.50 Num. Valid Values 21 21 21 21 Avg. Values 40.88 6.44 80.05 97.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.93 248.60 80.05 200.60 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1995 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.7885 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 = 0.4795 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5205 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9337 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 = 1.7372 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8550 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.056 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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