Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 34.43 7.44 33.50 2.00 05Dec2017 9 a.m. 34.70 7.53 34.67 31.67 05Dec2017 10 a.m. 35.91 8.44 33.00 122.25 05Dec2017 11 a.m. 37.94 9.10 31.00 204.00 05Dec2017 12 p.m. 40.05 8.33 29.25 303.75 05Dec2017 1 p.m. 42.14 6.34 26.33 263.33 05Dec2017 2 p.m. 43.61 4.42 24.25 270.50 05Dec2017 3 p.m. 43.88 1.40 24.00 201.00 05Dec2017 4 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 5 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 7 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 8 p.m. 28.40 6.49 55.00 0.00 05Dec2017 9 p.m. 29.84 11.86 54.00 0.00 05Dec2017 10 p.m. 28.76 7.27 57.00 0.00 05Dec2017 11 p.m. 27.23 4.59 56.75 0.00 06Dec2017 12 a.m. 26.20 3.69 62.00 0.00 06Dec2017 1 a.m. 24.94 4.14 65.25 0.00 06Dec2017 2 a.m. 21.61 3.86 70.75 0.00 06Dec2017 3 a.m. 20.06 3.65 78.00 0.00 06Dec2017 4 a.m. 18.91 5.03 80.00 0.00 06Dec2017 5 a.m. 18.23 3.02 82.50 0.00 06Dec2017 6 a.m. 18.10 5.37 81.25 0.00 06Dec2017 7 a.m. 16.88 6.93 86.50 0.00 Accuml. Values 591.82 118.90 1065.00 1398.50 Num. Valid Values 20 20 20 20 Avg. Values 29.59 5.95 53.25 69.93 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -1.34 229.57 53.25 144.29 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4675 definition: xcompl = 1 - (RELH_avg/100) TdC = -9.6481 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 = 0.3830 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6170 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2315 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 = 2.6151 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.5300 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.065 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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