Numerical studies of hydraulic transients for the TARP Phase I system
were conducted in 1988. and 1992. These studies revealed that due to
storage and/or conveyance limitation of the TARP Phase I Mainstream
system, inflow must be substantially reduced to avoid geysering problems
induced by hydraulic transients. Different inflow control solutions to different
cases of the TARP Phase I were suggested in the previous project reports.
TARP Phase II is designed to add additional water storage and increase the
conveyance ability. This study is to investigate the extent and nature of
hydraulic transients in Mainstream/Des Plaines TARP Phase II and to
evaluate its design performance using computer modeling.
The fully dynamic transient mixed flow mathematical model
(MXTRANS) developed at the University of Minnesota was used for this
study. To evaluate the hydraulic performance of the TARP Phase II System,
including the Phase I Mainstream tunnel, Phase II Relief tunnel, and Phase I
Des Plaines tunnel with or without four planned reservoir stages, four groups
of modeling configurations for the systems as listed below are being considered
Group A: Stage I Mainstream (Mainstream alone) Tunnel System
Group B: Stage II Mainstream (Mainstream. With Relief Tunnel) System
Group C: Des Plaines With or Without Mainstream System
Group D: Interconnected Des Plaines and Mainstream Systems (Mainstream with Relief Tunnel and Des Plaines Tunnel)
Metropolitan Water Reclamation District of Greater Chicago
Song, Charles C. S.; He, Jianming; Liu, Ying; Gong, Cuiling.
Hydraulic Transient Study of Mainstream & Des Plaines TARP Phase II Systems.
St. Anthony Falls Hydraulic Laboratory.
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