Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 4.86 2.50 61.45 0.00 31Dec2017 9 a.m. 4.71 3.50 64.79 44.80 31Dec2017 10 a.m. 4.78 2.50 66.43 110.70 31Dec2017 11 a.m. 5.18 2.30 64.96 244.90 31Dec2017 12 p.m. 6.91 2.60 59.25 445.50 31Dec2017 1 p.m. 8.11 3.90 54.26 482.10 31Dec2017 2 p.m. 9.34 3.70 51.26 449.40 31Dec2017 3 p.m. 10.54 2.30 50.13 348.30 31Dec2017 4 p.m. 10.69 2.70 49.23 233.20 31Dec2017 5 p.m. 10.04 2.80 50.67 63.10 31Dec2017 6 p.m. 7.63 5.00 55.30 0.00 31Dec2017 7 p.m. 10.67 5.00 39.89 0.00 31Dec2017 8 p.m. 4.14 3.20 62.04 0.00 31Dec2017 9 p.m. 2.52 5.70 65.25 0.00 31Dec2017 10 p.m. 1.02 4.90 65.21 0.00 31Dec2017 11 p.m. -0.08 1.80 66.49 0.00 01Jan2018 12 a.m. -1.01 1.40 66.27 0.00 01Jan2018 1 a.m. -1.98 1.40 64.79 0.00 01Jan2018 2 a.m. -2.54 1.20 66.58 0.00 01Jan2018 3 a.m. -3.73 2.00 66.44 0.00 01Jan2018 4 a.m. -4.50 2.10 62.21 0.00 01Jan2018 5 a.m. -4.36 1.40 62.80 0.00 01Jan2018 6 a.m. -4.77 2.00 61.08 0.00 01Jan2018 7 a.m. -4.94 2.10 60.77 0.00 Accuml. Values 73.22 68.00 1437.55 2422.00 Num. Valid Values 24 24 24 24 Avg. Values 3.05 2.83 59.90 100.92 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -16.08 109.41 59.90 208.24 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4010 definition: xcompl = 1 - (RELH_avg/100) TdC = -22.0601 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 = 0.1818 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8182 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.5845 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 = 0.7031 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.5408 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.022 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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