Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 26.38 17.81 89.83 160.00 07Mar2018 9 a.m. 28.90 19.39 80.41 380.00 07Mar2018 10 a.m. 32.09 18.63 62.83 581.00 07Mar2018 11 a.m. 35.28 18.59 55.56 738.00 07Mar2018 12 p.m. 38.03 19.09 48.85 837.00 07Mar2018 1 p.m. 41.54 23.03 37.79 868.00 07Mar2018 2 p.m. 43.07 22.79 37.12 828.00 07Mar2018 3 p.m. 44.62 20.58 31.62 722.00 07Mar2018 4 p.m. 46.04 19.34 33.82 557.00 07Mar2018 5 p.m. 47.25 19.90 32.36 362.00 07Mar2018 6 p.m. 47.35 15.23 30.34 139.00 07Mar2018 7 p.m. 47.03 4.99 30.77 1.00 07Mar2018 8 p.m. 40.12 5.45 44.51 0.00 07Mar2018 9 p.m. 37.69 5.33 48.60 0.00 07Mar2018 10 p.m. 34.95 7.83 49.88 0.00 07Mar2018 11 p.m. 33.42 7.93 50.31 0.00 08Mar2018 12 a.m. 31.33 5.97 52.88 0.00 08Mar2018 1 a.m. 31.53 2.24 55.01 0.00 08Mar2018 2 a.m. 29.01 1.51 60.62 0.00 08Mar2018 3 a.m. 29.25 4.80 61.24 0.00 08Mar2018 4 a.m. 28.02 5.61 63.32 0.00 08Mar2018 5 a.m. 25.83 7.14 68.63 0.00 08Mar2018 6 a.m. 20.55 3.15 72.05 0.00 08Mar2018 7 a.m. 21.22 3.47 68.32 6.00 Accuml. Values 840.50 279.80 1266.67 6179.00 Num. Valid Values 24 24 24 24 Avg. Values 35.02 11.66 52.78 257.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.68 450.20 52.78 531.27 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4722 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.9519 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 = 0.4294 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5706 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.5855 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 = 3.2846 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.9141 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.188 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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