Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 34.38 5.42 77.25 49.25 07Nov2017 9 a.m. 38.60 7.75 66.33 124.67 07Nov2017 10 a.m. 42.75 12.25 56.75 247.50 07Nov2017 11 a.m. 43.46 14.54 53.67 281.00 07Nov2017 12 p.m. 44.06 13.92 56.75 281.75 07Nov2017 1 p.m. 44.36 12.90 58.00 249.33 07Nov2017 2 p.m. 45.90 13.09 53.25 280.25 07Nov2017 3 p.m. 48.33 12.97 45.75 256.50 07Nov2017 4 p.m. 48.60 13.14 40.50 156.50 07Nov2017 5 p.m. 47.21 13.59 38.75 75.75 07Nov2017 6 p.m. 43.16 12.53 43.00 0.00 07Nov2017 7 p.m. 41.36 11.63 47.00 0.00 07Nov2017 8 p.m. 41.00 12.19 50.00 0.00 07Nov2017 9 p.m. 40.16 10.29 52.33 0.00 07Nov2017 10 p.m. 39.24 8.39 53.00 0.00 07Nov2017 11 p.m. 38.48 6.86 55.67 0.00 08Nov2017 12 a.m. 38.57 8.89 56.25 0.00 08Nov2017 1 a.m. 38.43 5.87 56.25 0.00 08Nov2017 2 a.m. 37.94 8.95 61.50 0.00 08Nov2017 3 a.m. 34.46 8.50 90.67 0.00 08Nov2017 4 a.m. 34.20 9.51 93.25 0.00 08Nov2017 5 a.m. 33.89 8.16 94.00 0.00 08Nov2017 6 a.m. 34.20 7.05 90.50 0.00 08Nov2017 7 a.m. 34.61 7.27 88.50 0.00 Accuml. Values 967.35 245.66 1478.92 2002.50 Num. Valid Values 24 24 24 24 Avg. Values 40.31 10.24 61.62 83.44 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.61 395.27 61.62 172.17 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3838 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.0893 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 = 0.4747 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5253 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.6294 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 = 3.2637 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.4354 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.103 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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