Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 29.52 4.34 67.73 90.89 07Mar2018 9 a.m. 32.31 6.25 63.23 364.71 07Mar2018 10 a.m. 35.20 7.39 57.17 604.46 07Mar2018 11 a.m. 37.96 6.78 52.99 764.51 07Mar2018 12 p.m. 40.95 6.86 47.46 887.73 07Mar2018 1 p.m. 44.62 7.35 37.38 942.75 07Mar2018 2 p.m. 47.88 9.29 25.51 915.81 07Mar2018 3 p.m. 50.18 6.98 21.42 809.01 07Mar2018 4 p.m. 51.22 8.05 20.46 635.14 07Mar2018 5 p.m. 52.18 7.64 19.96 412.07 07Mar2018 6 p.m. 51.80 7.58 19.46 168.84 07Mar2018 7 p.m. 52.05 6.28 30.49 7.52 07Mar2018 8 p.m. 45.39 1.57 27.41 0.00 07Mar2018 9 p.m. 43.14 2.38 28.98 0.00 07Mar2018 10 p.m. 40.21 2.64 33.07 0.00 07Mar2018 11 p.m. 37.65 2.14 38.20 0.00 08Mar2018 12 a.m. 36.86 2.15 39.52 0.00 08Mar2018 1 a.m. 35.80 2.18 41.00 0.00 08Mar2018 2 a.m. 33.78 2.19 45.94 0.00 08Mar2018 3 a.m. 32.49 1.58 49.81 0.00 08Mar2018 4 a.m. 31.17 1.60 53.51 0.00 08Mar2018 5 a.m. 29.17 2.56 59.10 0.00 08Mar2018 6 a.m. 28.24 1.89 61.96 0.00 08Mar2018 7 a.m. 27.77 2.93 64.27 0.00 Accuml. Values 947.53 110.60 1006.03 6603.44 Num. Valid Values 24 24 24 24 Avg. Values 39.48 4.61 41.92 275.14 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.16 177.96 41.92 567.76 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5808 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.7481 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 = 0.4676 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5324 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.2603 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 = 4.8338 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.7453 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.175 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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