Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 31.28 7.90 59.36 6.60 06Dec2017 9 a.m. 34.59 13.20 55.89 115.50 06Dec2017 10 a.m. 37.99 15.70 55.95 271.60 06Dec2017 11 a.m. 41.31 7.80 55.13 389.30 06Dec2017 12 p.m. 43.16 17.30 47.69 464.60 06Dec2017 1 p.m. 44.74 14.70 42.32 421.60 06Dec2017 2 p.m. 45.61 17.30 39.25 460.80 06Dec2017 3 p.m. 46.17 19.80 36.80 303.20 06Dec2017 4 p.m. 46.49 17.10 36.71 118.30 06Dec2017 5 p.m. 46.20 7.00 39.45 30.90 06Dec2017 6 p.m. 44.53 2.10 44.94 0.00 06Dec2017 7 p.m. 24.78 7.60 40.71 0.00 06Dec2017 8 p.m. 38.62 2.10 57.73 0.00 06Dec2017 9 p.m. 35.04 2.30 61.30 0.00 06Dec2017 10 p.m. 31.23 1.90 58.54 0.00 06Dec2017 11 p.m. 29.34 2.20 60.16 0.00 07Dec2017 12 a.m. 27.10 1.80 61.24 0.00 07Dec2017 1 a.m. 26.19 2.10 66.48 0.00 07Dec2017 2 a.m. 24.69 1.80 69.00 0.00 07Dec2017 3 a.m. 24.01 2.70 71.53 0.00 07Dec2017 4 a.m. 22.68 6.30 75.21 0.00 07Dec2017 5 a.m. 22.05 2.60 79.46 0.00 07Dec2017 6 a.m. 21.20 2.90 78.14 0.00 07Dec2017 7 a.m. 20.88 8.70 77.62 0.00 Accuml. Values 809.87 184.90 1370.61 2582.40 Num. Valid Values 24 24 24 24 Avg. Values 33.74 7.70 57.11 107.60 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 0.97 297.50 57.11 222.03 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4289 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.5620 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 = 0.4185 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5815 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0360 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 = 2.8288 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.2030 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.090 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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