Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 28.87 12.40 76.18 76.40 07Mar2018 9 a.m. 29.21 16.70 74.16 282.50 07Mar2018 10 a.m. 31.15 9.50 69.56 476.20 07Mar2018 11 a.m. 32.95 8.40 61.27 621.80 07Mar2018 12 p.m. 36.16 8.20 52.97 720.30 07Mar2018 1 p.m. 39.34 5.30 41.83 757.00 07Mar2018 2 p.m. 42.15 5.20 35.97 732.90 07Mar2018 3 p.m. 44.49 5.70 30.04 649.80 07Mar2018 4 p.m. 46.09 4.10 27.11 512.10 07Mar2018 5 p.m. 46.81 3.00 26.96 331.00 07Mar2018 6 p.m. 46.87 2.00 28.42 140.00 07Mar2018 7 p.m. 47.08 4.00 30.88 3.90 07Mar2018 8 p.m. 42.94 1.20 37.83 0.00 07Mar2018 9 p.m. 41.11 0.80 37.94 0.00 07Mar2018 10 p.m. 39.20 1.90 42.27 0.00 07Mar2018 11 p.m. 35.87 0.90 47.59 0.00 08Mar2018 12 a.m. 33.51 0.70 52.82 0.00 08Mar2018 1 a.m. 33.12 1.00 55.17 0.00 08Mar2018 2 a.m. 30.45 3.30 58.31 0.00 08Mar2018 3 a.m. 28.65 3.00 65.13 0.00 08Mar2018 4 a.m. 26.49 4.80 67.44 0.00 08Mar2018 5 a.m. 26.76 1.40 72.52 0.00 08Mar2018 6 a.m. 24.82 1.00 74.07 0.00 08Mar2018 7 a.m. 23.85 1.30 74.37 0.00 Accuml. Values 857.96 105.80 1240.81 5303.90 Num. Valid Values 24 24 24 24 Avg. Values 35.75 4.41 51.70 221.00 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.08 170.23 51.70 456.03 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4830 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.8519 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 = 0.4357 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5643 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.6853 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 = 3.4596 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7236 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.124 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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