Browsing by Author "Guo, Qizhong"

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    Hydraulic Transient Analysis of Tarp Phase II System
    (St. Anthony Falls Hydraulic Laboratory, 1988-09) Guo, Qizhong; Song, Charles C. S.
    The O'Hare System of the Tunnel and Reservoir Plan (TARP), which services 11.2 square miles of combined sewers, as shown in Fig. 1, is the smallest of the four systems comprising the 352-square mile combined sewer service area operated by the Metropolitan Sanitary District of Greater Chicago (MSDGC). After completion of this system in 1980, the O'Hare System area has still experienced problems, including basement flooding from sewer back-up and foundation seepage, overbank flooding, transportation delays caused by flooded streets, water quality degradation of area watercourses from combined sewer overflow, and public health hazards resulting from sewer back-ups. The average annual damage due to flooding in the O'Hare System are estimated to be in excess of $2.5 million
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    Hydraulic Transient Modeling of Tarp Systems
    (St. Anthony Falls Hydraulic Laboratory, 1988-03) Song, Charles C. S.; Guo, Qizhong; Zheng, Yifan
    Under the agreement of November 1, 1986, between the Metropolitan Sanitary District of Greater Chicago and the University of Minnesota, the St. Anthony Falls Hydraulic Laboratory of the University conducted mathematical modeling of the recently completed portions of the Tunnel and Reservoir Plan (TARP), both the Mainstream System and the Calumet System of Greater Chicago, for the purpose of establishing optimum operating procedures and additional structures to control hydraulic transient problems. The scope of the work was later extended to include the Des Plaines System and the 13A tunnel when operated independently of the Mainstream System.
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    River Ice Processes and Flooding: Filed Data Collection and Mathematical Modeling
    (St. Anthony Falls Hydraulic Laboratory, 1989-06) Guo, Qizhong; Tan, Oi Kuwang; Song, Charles C. S.
    Minnesota, as other states and countries in the Northern Hemisphere, has frequently experienced problems related to river ice. These problems include, among others, winter and spring flooding due to reduction of river transport capacity by ice, limitation on peaking hydropower plant output due to possibility of ice cover break up upstream and downstream, damages to bridge piers and erosion due to rapid movement of broken ice sheets, clogging of intakes by frazil, and complete shutdown of the navigation channel. This study emphasizes river ice processes and their relations to flooding. Over the years, the State of Minnesota has suffered from winter and spring flooding in the Red River of the North, the Mississippi River, the Minnesota River, and other smaller rivers. Declaration of Spring Flood Emergency by the President of the United States in 1979 and by the Governor of the State this year (1989) in the Red River of the North signifies the importance of this study.