Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 66.06 21.70 81.55 1.20 04Dec2017 9 a.m. 66.06 19.80 82.06 79.90 04Dec2017 10 a.m. 68.85 25.40 75.11 302.90 04Dec2017 11 a.m. 71.08 25.70 66.42 364.20 04Dec2017 12 p.m. 72.45 25.10 60.28 442.30 04Dec2017 1 p.m. 73.24 22.20 51.94 440.20 04Dec2017 2 p.m. 72.23 17.40 45.47 280.20 04Dec2017 3 p.m. 64.72 22.20 41.62 269.30 04Dec2017 4 p.m. 63.36 18.60 41.55 204.40 04Dec2017 5 p.m. 63.52 20.80 31.84 58.50 04Dec2017 6 p.m. 60.28 18.30 28.53 0.00 04Dec2017 7 p.m. 38.01 4.20 39.90 0.00 04Dec2017 8 p.m. 52.97 26.40 41.11 0.00 04Dec2017 9 p.m. 49.84 24.50 41.92 0.00 04Dec2017 10 p.m. 45.88 25.20 45.82 0.00 04Dec2017 11 p.m. 43.95 19.80 47.67 0.00 05Dec2017 12 a.m. 42.96 20.40 40.91 0.00 05Dec2017 1 a.m. 41.43 18.10 35.84 0.00 05Dec2017 2 a.m. 38.66 17.50 39.89 0.00 05Dec2017 3 a.m. 36.91 20.10 42.56 0.00 05Dec2017 4 a.m. 35.58 19.70 44.53 0.00 05Dec2017 5 a.m. 34.54 19.10 46.37 0.00 05Dec2017 6 a.m. 34.21 15.30 45.15 0.00 05Dec2017 7 a.m. 33.91 12.50 42.88 0.00 Accuml. Values 1270.69 480.00 1160.92 2443.10 Num. Valid Values 24 24 24 24 Avg. Values 52.95 20.00 48.37 101.80 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.64 772.32 48.37 210.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5163 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.0705 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 = 0.5786 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4214 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2684 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 = 7.1048 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 14.9350 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.277 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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