Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 38.57 1.90 99.00 1.00 04Nov2017 9 a.m. 39.51 2.29 99.25 59.50 04Nov2017 10 a.m. 45.92 2.24 99.00 237.33 04Nov2017 11 a.m. 55.80 3.24 81.50 457.00 04Nov2017 12 p.m. 67.58 4.77 52.33 549.67 04Nov2017 1 p.m. 74.34 10.23 36.25 588.50 04Nov2017 2 p.m. 76.40 6.71 31.33 507.33 04Nov2017 3 p.m. 79.56 7.49 27.75 575.50 04Nov2017 4 p.m. 80.28 8.56 26.25 335.50 04Nov2017 5 p.m. 80.82 7.10 24.25 249.75 04Nov2017 6 p.m. 74.93 4.64 30.75 61.00 04Nov2017 7 p.m. 67.10 0.45 41.00 0.00 04Nov2017 8 p.m. 64.40 3.80 44.00 0.00 04Nov2017 9 p.m. 61.07 4.14 51.00 0.00 04Nov2017 10 p.m. 64.52 5.89 46.33 0.00 04Nov2017 11 p.m. 68.09 8.95 40.00 0.00 05Nov2017 12 a.m. 69.17 11.74 33.00 0.00 05Nov2017 1 a.m. 68.54 15.15 34.00 0.00 05Nov2017 2 a.m. 63.54 11.69 41.25 0.00 05Nov2017 3 a.m. 63.80 9.99 40.00 0.00 05Nov2017 4 a.m. 60.80 7.46 45.00 0.00 05Nov2017 5 a.m. 58.46 5.93 51.00 0.00 05Nov2017 6 a.m. 57.33 5.26 53.75 0.00 05Nov2017 7 a.m. 58.01 4.14 52.00 5.50 Accuml. Values 1538.54 153.76 1179.99 3627.58 Num. Valid Values 24 24 24 24 Avg. Values 64.11 6.41 49.17 151.15 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.84 247.40 49.17 311.90 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5083 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.0296 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 = 0.6608 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3392 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.8733 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 = 10.3910 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.9247 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.194 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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