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<br />002036 <br />Hogback Canal - Calculations of Seepage rates for ponding tests. <br /> <br />Pond No.3 <br />'\1 <br /> <br />_. <br />~;. <br />....... <br /> <br />. <br /> <br />-r <br /> <br />1520 ft <br /> <br />~ <br /> <br /> <br />a=14 ft <br /> <br /> <br />A = 1/2 (a+b)h <br />A = cross sectional area <br /> <br />P w = b+ [ h2+~] 1/2(2) <br />P w = wetted perimeter <br />Pwl = 6+ [2.242+4.02]112(2) = 15.16 <br />P w2 = 6+ [1.522+2.32] 112(2) = 12.37 <br /> <br />Al = 112(14+6)2.24 = 22.40 ft2 <br />VI = A I (L) = 22.40(1520) = 34,048 ft3 <br />A2 = 112(13+6)1.52 = 15.20 ft2 <br />V2 = A2(L) = 15.20(1520) = 23,104 ft3 <br />.1.V = VI-V2 = 1O,944ft3 <br /> <br />Aw = wetted area = P w(L) Seepage = .1. V f~/A vg. Aw ft2rfime (days) <br />Awl = Pwl(L) = 23,043.2 ft2 <br />Aw2 = Pw2(L) = 17,495.2 ft2 Seepage = 10,944 ft3120,269ft2/3.29days =0.16 ftIday <br />Average Aw = 20,269.2 ft2 <br />Seepage minus evaporation] = 0,16 ftIday - 0.01 ftIday = 0.15 ftIday <br /> <br />Pond No.4 <br /> <br />. <br /> <br />-r <br /> <br />'\1 <br /> <br />~ <br /> <br />1,250 ft <br /> <br /> <br />a=16.5 <br /> <br /> <br />3.30 ft 3,20 ft <br />It- b =7ft <br /> <br />c=4.75 <br /> <br />Al = 112(7+16,5)3,3 = 38,78 ft2 <br />VI = Al (L) = 38.78(1250) = 48,469ft3 <br />A2 = 1/2(13+7)3.2 = 35.20 ft2 <br />V2 = A2(L) = 35.20(1250) = 44,000 ft3 <br />.1.V = V I-V2 = 4,469 ft3 <br /> <br />P wi = 7+ [3.302+4.752] 112(2) = 18.56 <br /> <br />P w2 = 7+ [3.202+4.02] 1/2(2) = 17.24 <br /> <br />. Awl = Pwl(L) = 23,209 ft2 <br />Aw2 = Pw2(L) = 21,550 ft2 <br />Average Aw = 22,379 ft2 <br /> <br />Seepage =.1.V ft3/Avg. Aw ft2rrime (days) <br />Seepage = 4,469 ft3122,379 ft2/3.08days = 0.07 ftIday <br />Seepage minus evaporation] = 0.07 ftIday - 0.01 ftIday = 0.06 ftJday <br /> <br />. <br /> <br />] Evaportation value from Water Use Prodution, Functions of Selected Agronomic <br />Crops in NW New Mexico. <br /> <br />14 <br />