Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 30.16 15.15 88.75 1.00 29Dec2017 9 a.m. 30.74 15.14 87.67 11.67 29Dec2017 10 a.m. 31.51 14.88 86.00 46.00 29Dec2017 11 a.m. 32.84 15.06 83.00 83.00 29Dec2017 12 p.m. 34.79 16.78 79.25 149.25 29Dec2017 1 p.m. 37.22 16.18 74.00 250.33 29Dec2017 2 p.m. 40.28 14.71 67.25 364.50 29Dec2017 3 p.m. 43.74 11.58 59.00 400.25 29Dec2017 4 p.m. 44.96 11.41 56.25 276.25 29Dec2017 5 p.m. 43.83 8.56 59.00 114.75 29Dec2017 6 p.m. 38.66 2.91 71.00 0.00 29Dec2017 7 p.m. 32.90 1.79 83.00 0.00 29Dec2017 8 p.m. 31.91 3.47 87.50 0.00 29Dec2017 9 p.m. 28.22 1.12 91.33 0.00 29Dec2017 10 p.m. 24.74 2.24 93.00 0.00 29Dec2017 11 p.m. 26.78 2.68 94.00 0.00 30Dec2017 12 a.m. 23.86 3.36 93.75 0.00 30Dec2017 1 a.m. 26.33 10.18 92.75 0.00 30Dec2017 2 a.m. 26.06 13.09 87.75 0.00 30Dec2017 3 a.m. 24.62 14.09 86.00 0.00 30Dec2017 4 a.m. 23.14 15.04 82.50 0.00 30Dec2017 5 a.m. 21.92 13.20 83.00 0.00 30Dec2017 6 a.m. 20.80 12.97 84.50 0.00 30Dec2017 7 a.m. 19.13 13.09 87.00 0.00 Accuml. Values 739.14 248.68 1957.25 1697.00 Num. Valid Values 24 24 24 24 Avg. Values 30.80 10.36 81.55 70.71 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -0.67 400.13 81.55 145.91 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1845 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.4357 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 = 0.3932 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6068 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2582 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 = 1.0833 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6956 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.045 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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