Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 26.53 10.70 75.73 132.30 07Mar2018 9 a.m. 29.73 12.30 65.68 401.20 07Mar2018 10 a.m. 32.58 13.40 59.90 641.00 07Mar2018 11 a.m. 35.46 12.90 57.37 823.30 07Mar2018 12 p.m. 38.86 12.50 51.82 930.70 07Mar2018 1 p.m. 42.30 16.50 40.81 976.90 07Mar2018 2 p.m. 45.30 17.70 30.87 936.40 07Mar2018 3 p.m. 47.48 16.90 25.79 824.80 07Mar2018 4 p.m. 49.06 16.70 22.71 646.00 07Mar2018 5 p.m. 49.68 15.40 22.94 417.00 07Mar2018 6 p.m. 49.59 13.80 21.30 166.30 07Mar2018 7 p.m. 50.18 7.20 32.60 0.80 07Mar2018 8 p.m. 44.44 3.80 25.35 0.00 07Mar2018 9 p.m. 41.65 1.20 38.43 0.00 07Mar2018 10 p.m. 39.00 1.10 56.25 0.00 07Mar2018 11 p.m. 37.42 2.20 55.39 0.00 08Mar2018 12 a.m. 34.66 2.90 54.68 0.00 08Mar2018 1 a.m. 33.28 2.60 66.05 0.00 08Mar2018 2 a.m. 32.13 3.00 66.27 0.00 08Mar2018 3 a.m. 31.05 3.00 59.48 0.00 08Mar2018 4 a.m. 28.78 3.80 58.28 0.00 08Mar2018 5 a.m. 27.66 2.60 58.41 0.00 08Mar2018 6 a.m. 26.04 2.60 62.79 0.00 08Mar2018 7 a.m. 26.06 2.50 62.66 0.70 Accuml. Values 898.90 197.30 1171.56 6897.40 Num. Valid Values 24 24 24 24 Avg. Values 37.45 8.22 48.82 287.39 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.03 317.46 48.82 593.04 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5118 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.7447 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 = 0.4503 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5497 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.4974 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 = 3.9263 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.4670 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.194 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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