Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 50.02 5.80 92.23 5.60 05Nov2017 9 a.m. 50.13 2.30 89.28 17.80 05Nov2017 10 a.m. 50.32 2.20 85.62 39.90 05Nov2017 11 a.m. 48.36 2.10 81.43 73.30 05Nov2017 12 p.m. 49.60 1.80 73.89 403.80 05Nov2017 1 p.m. 51.51 2.00 65.76 452.60 05Nov2017 2 p.m. 51.30 2.40 63.91 493.60 05Nov2017 3 p.m. 50.88 2.20 62.79 400.50 05Nov2017 4 p.m. 49.08 2.00 65.44 111.20 05Nov2017 5 p.m. 49.03 1.80 65.90 62.60 05Nov2017 6 p.m. 48.67 1.80 66.54 0.60 05Nov2017 7 p.m. 41.99 4.80 55.86 0.00 05Nov2017 8 p.m. 45.66 2.30 70.02 0.00 05Nov2017 9 p.m. 44.11 3.20 66.45 0.00 05Nov2017 10 p.m. 42.01 6.40 61.42 0.00 05Nov2017 11 p.m. 39.58 5.80 64.29 0.00 06Nov2017 12 a.m. 39.15 8.90 60.85 0.00 06Nov2017 1 a.m. 38.86 11.00 60.84 0.00 06Nov2017 2 a.m. 37.83 6.60 63.55 0.00 06Nov2017 3 a.m. 37.51 4.20 66.32 0.00 06Nov2017 4 a.m. 36.61 7.10 69.08 0.00 06Nov2017 5 a.m. 35.44 5.70 73.69 0.00 06Nov2017 6 a.m. 34.32 6.80 77.29 0.00 06Nov2017 7 a.m. 33.15 7.70 78.33 0.00 Accuml. Values 1055.12 106.90 1680.78 2061.50 Num. Valid Values 24 24 24 24 Avg. Values 43.96 4.45 70.03 85.90 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.65 172.00 70.03 177.25 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2997 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.6145 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 = 0.5056 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4944 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7370 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 = 2.9215 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3602 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.061 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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