Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 34.02 2.30 61.55 0.00 29Dec2017 9 a.m. 34.90 2.90 60.87 16.70 29Dec2017 10 a.m. 36.30 5.10 59.64 41.80 29Dec2017 11 a.m. 37.54 4.50 58.90 77.10 29Dec2017 12 p.m. 38.73 5.70 60.14 118.50 29Dec2017 1 p.m. 40.23 7.40 59.23 185.90 29Dec2017 2 p.m. 41.90 5.80 60.36 185.40 29Dec2017 3 p.m. 42.40 6.30 62.59 169.30 29Dec2017 4 p.m. 43.05 5.80 62.73 128.30 29Dec2017 5 p.m. 43.57 3.00 62.93 51.60 29Dec2017 6 p.m. 43.16 1.90 64.39 0.00 29Dec2017 7 p.m. 21.76 6.90 63.93 0.00 29Dec2017 8 p.m. 42.17 0.90 69.22 0.00 29Dec2017 9 p.m. 41.29 0.60 76.66 0.00 29Dec2017 10 p.m. 41.11 0.50 74.38 0.00 29Dec2017 11 p.m. 40.73 1.50 77.27 0.00 30Dec2017 12 a.m. 40.30 1.00 77.50 0.00 30Dec2017 1 a.m. 40.30 0.70 78.08 0.00 30Dec2017 2 a.m. 40.28 3.20 76.85 0.00 30Dec2017 3 a.m. 40.14 4.50 74.78 0.00 30Dec2017 4 a.m. 39.76 5.00 75.33 0.00 30Dec2017 5 a.m. 35.85 13.10 77.29 0.00 30Dec2017 6 a.m. 30.76 14.30 81.19 0.00 30Dec2017 7 a.m. 28.33 13.30 81.88 0.00 Accuml. Values 918.57 116.20 1657.69 974.60 Num. Valid Values 24 24 24 24 Avg. Values 38.27 4.84 69.07 40.61 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.49 186.97 69.07 83.80 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3093 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.6137 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 = 0.4573 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5427 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2601 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 = 2.4250 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0981 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.040 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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