Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 31.46 2.50 59.16 12.50 06Dec2017 9 a.m. 33.93 1.90 53.82 158.70 06Dec2017 10 a.m. 37.81 4.10 51.16 319.60 06Dec2017 11 a.m. 41.31 4.70 49.36 445.20 06Dec2017 12 p.m. 44.94 4.90 45.25 517.30 06Dec2017 1 p.m. 47.88 9.60 40.66 531.20 06Dec2017 2 p.m. 49.24 13.10 39.11 482.40 06Dec2017 3 p.m. 49.89 17.70 36.45 381.20 06Dec2017 4 p.m. 49.41 15.60 36.75 237.90 06Dec2017 5 p.m. 49.32 13.90 32.29 70.20 06Dec2017 6 p.m. 46.87 10.00 35.57 0.00 06Dec2017 7 p.m. 30.60 5.70 43.85 0.00 06Dec2017 8 p.m. 41.95 3.80 44.65 0.00 06Dec2017 9 p.m. 41.88 5.60 45.34 0.00 06Dec2017 10 p.m. 41.40 8.70 44.95 0.00 06Dec2017 11 p.m. 40.26 16.70 54.16 0.00 07Dec2017 12 a.m. 38.52 19.80 64.50 0.00 07Dec2017 1 a.m. 36.72 23.00 66.68 0.00 07Dec2017 2 a.m. 34.45 24.90 65.91 0.00 07Dec2017 3 a.m. 31.95 21.30 62.86 0.00 07Dec2017 4 a.m. 29.46 19.10 62.43 0.00 07Dec2017 5 a.m. 27.28 20.60 65.75 0.00 07Dec2017 6 a.m. 25.38 16.00 67.41 0.00 07Dec2017 7 a.m. 23.47 11.40 70.81 0.00 Accuml. Values 925.36 294.60 1238.88 3156.20 Num. Valid Values 24 24 24 24 Avg. Values 38.56 12.28 51.62 131.51 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.64 474.01 51.62 271.37 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4838 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.4224 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 = 0.4597 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5403 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6461 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 = 3.8682 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.9018 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.155 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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