The purpose of this study is to evaluate the hydraulic transient status in
the proposed Passaic River Flood Protection Tunnel. The tunnel system is
designed to convey flood waters from the upstream areas of Passaic River
directly into Newark Bay. The tunnel consists of two upstream inlets, the
Pompton Inlet and the Spur Inlet, and a 42 ft diameter main tunnel. The
main tunnel length is about 20.1 miles (from the Pompton inlet to the
downstream end). The distance between the Spur inlet and the main tunnel is
about 1.2 miles. The tunnel system will be excavated from 150 to more than
400 ft under ground. From the hydraulic transient point of view, there are the
following possible safety concerns in this tunnel system, which need to be
evaluated using hydraulic transient computer. simulation program.
(1) Surge phenomena induced during the initial filling stage.
(2) Water hammer phenomena due to a sudden pressure change.
(3) The effects of the surge and water hammer on the inlets,
workshafts, and downstream outlet.
Passaic River Division, US Army Corps of Engineers
He, Jianming; Song, Charles C. S.; Liu, Ying.
Hydraulic Transient Study of Passaic River Flood Protection Tunnel.
St. Anthony Falls Hydraulic Laboratory.
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