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w ro -~~-The canal is an open system. As flow increases, the water level simply rises. If 6" of shotcrete is
z ; g g 4 added, at the top, and 3' is added to the liner, bottom and sides, as on the Starlight relining..... flow is
v r o not affected. The water level just rises slightly to accommodate the additional volumn. In fact, the
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a additional 6" increases the i,oteimal capacity. At a water depth of two feet the cross section is 14
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3 square feet for existing liner, 13.75 for new liner on top. Assuming 6' of freeboard above the
o M shotcrete, in each case, the old liner remains 14 sq feet, but the 6" added in the new scenario (even
.3 ^ G with added 3' on sides and bottom) creates a cross section of 18 square feet. The increase in depth t
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T g a o m (capacity) has made a significant difference. I am not a math wiz, but that's my take on it .14 vs 18.
a a s g N E The area of a trapezoid is one half the height times the sum of the top and bottom sides.
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