Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 34.29 6.43 93.75 15.25 02Dec2017 9 a.m. 38.54 7.46 91.33 141.33 02Dec2017 10 a.m. 45.72 9.67 81.75 303.75 02Dec2017 11 a.m. 53.12 7.46 68.00 423.67 02Dec2017 12 p.m. 59.72 7.55 57.25 508.75 02Dec2017 1 p.m. 63.98 7.08 52.33 524.67 02Dec2017 2 p.m. 65.88 5.93 46.75 475.25 02Dec2017 3 p.m. 67.28 5.26 44.25 355.50 02Dec2017 4 p.m. 66.83 5.98 44.75 216.75 02Dec2017 5 p.m. 64.58 6.77 50.25 108.00 02Dec2017 6 p.m. 55.58 8.95 69.00 0.00 02Dec2017 7 p.m. 51.62 7.16 80.00 0.00 02Dec2017 8 p.m. 48.56 4.47 87.00 0.00 02Dec2017 9 p.m. 46.67 1.57 92.00 0.00 02Dec2017 10 p.m. 43.10 4.85 96.00 0.00 02Dec2017 11 p.m. 41.90 4.25 96.25 0.00 03Dec2017 12 a.m. 40.28 2.54 97.67 0.00 03Dec2017 1 a.m. 38.79 3.24 97.75 0.00 03Dec2017 2 a.m. 39.02 3.91 98.50 0.00 03Dec2017 3 a.m. 37.40 3.28 99.00 0.00 03Dec2017 4 a.m. 38.93 5.42 99.00 0.00 03Dec2017 5 a.m. 38.03 4.47 98.50 0.00 03Dec2017 6 a.m. 36.41 2.68 99.00 0.00 03Dec2017 7 a.m. 36.68 0.89 99.00 0.00 Accuml. Values 1152.91 127.27 1939.08 3072.92 Num. Valid Values 24 24 24 24 Avg. Values 48.04 5.30 80.80 128.04 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.91 204.78 80.80 264.21 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1920 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.8014 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 = 0.5393 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4607 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7879 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 = 2.1911 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0219 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.075 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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