Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. -901.00 13.65 42.14 111.43 06Mar2018 9 a.m. -901.00 14.73 31.41 346.95 06Mar2018 10 a.m. -901.00 16.71 26.29 565.76 06Mar2018 11 a.m. -901.00 18.82 21.63 744.00 06Mar2018 12 p.m. -901.00 19.89 20.83 858.23 06Mar2018 1 p.m. -901.00 24.04 15.72 899.18 06Mar2018 2 p.m. -901.00 23.47 15.10 840.54 06Mar2018 3 p.m. -901.00 23.42 14.21 706.43 06Mar2018 4 p.m. -901.00 23.67 15.54 535.65 06Mar2018 5 p.m. -901.00 23.44 19.53 318.25 06Mar2018 6 p.m. -901.00 21.56 32.06 102.83 06Mar2018 7 p.m. -901.00 4.47 22.48 4.84 06Mar2018 8 p.m. -901.00 14.43 40.26 0.00 06Mar2018 9 p.m. -901.00 12.26 42.17 0.00 06Mar2018 10 p.m. -901.00 10.98 44.54 0.00 06Mar2018 11 p.m. -901.00 8.75 49.04 0.00 07Mar2018 12 a.m. -901.00 5.39 53.81 0.00 07Mar2018 1 a.m. -901.00 6.21 56.76 0.00 07Mar2018 2 a.m. -901.00 6.74 62.53 0.00 07Mar2018 3 a.m. -901.00 10.73 64.04 0.00 07Mar2018 4 a.m. -901.00 7.06 66.29 0.00 07Mar2018 5 a.m. -901.00 5.08 68.36 0.00 07Mar2018 6 a.m. -901.00 4.54 73.31 0.00 07Mar2018 7 a.m. -901.00 6.22 77.99 0.00 Accuml. Values 0.00 326.26 976.04 6034.09 Num. Valid Values 0 24 24 24 Avg. Values 13.59 40.67 251.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 524.95 40.67 518.81 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5933 definition: xcompl = 1 - (RELH_avg/100) TdC = -28.0173 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 = 0.1635 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8365 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.3435 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 = 0.9046 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7783 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.080 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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