Managing the Impacts of Storm Surges on Victoria Island, Lagos, Nigeria
Victoria Island is one of the barrier islands along the Nigerian Coast. The others are Lagos, Lekki, Ikovi, and Badagry. A general characteristic of these barrier islands in Nigeria is...
Two Dimensional Modeling of the Mobile River Delta and the Mobile Bay System
Two dimensional hydraulic modeling of Mobile Bay and the Mobile River Delta was conducted to determine critical hydraulic conditions for scour evaluations at bridges in the Mobile Bay...
Comparison of Worst-Case and Probabilistic Approaches to Ocean Outfall Mixing Zone Analysis
Two approaches have been used for ocean outfall mixing zone analysis: worst-case approach and probabilistic approach. This paper discusses some advantages and disadvantages of the worst-case...
Storm-Surge Flooding in Chittagong City and Associated Risk
Chittagong, the biggest seaport and the second largest city of Bangladesh, is highly prone to storm-surge floodings. The paper will highlight the extent of the storm-surge floodings and...
Effective Management and Control of Urban Flood Disasters in West Africa
This paper begins by examining the characteristics of the impacts of flood disasters in the urban centers of West Africa. The paper then examines some significant examples of individual...
Physical Modeling to Determine Head Loss at Selected Surcharged Sewer Manholes
The head losses at sewer pipe junctions (manholes) under surcharged conditions were measured in a 1:6 scale model of a typical manhole with one main line passing through it and two perpendicular...
Floodplain Management in Los Angeles County
Los Angeles is located in a geologically young area of the western United States. It is characterized by highly erodible, steep mountains and flat alluvial plains. Located in a semi-arid...
Hollyhills Drain Relief for 1920s Drainage System
The paper will discuss design and construction problems encountered for a $50,000,000 Urban Storm Drain System in the Metropolitan Los Angeles Area. The Drainage System relieves a system...
No-Dig Gains Ground
The Miami-Dade Water and Sewer Department (MDWASD), the regional wastewater utility of Metropolitan Dade County, is currently undertaking one of the Country's largest Infiltration/Inflow...
Honolulu's Street Relief
Engineers faced the daunting prospect of burying a new relief sewer under a busy Honolulu highway with trench-cut methods. The contractor suggested microtunneling, but the coral reef formations...
An Interception by Boston
Engineers in Boston were recently challenged to design a rehabilitation and replacement for sections of the 60-year-old St. James Avenue sewer system. Approximately 20,000 vehicles per...
Grouting Through a River
A regional sewer district in Ohio is implementing a master plan to separate storm and sanitary flows, decommission some old treatment plants and upgrade others. Part of the plan, the West...
San Francisco CSO
Today, even a light rain can overload San Francisco's combined sewer overflow (CSO) system, sending untreated sewage and stormwater into the bay and ocean. This is especially...
Trenchless in San Diego
The Middletown Trunk Sewer is located near downtown San Diego. Sewage backups prompted a study, recommending construction of a larger replacement pipeline. The City of San Diego prepared...
Masonry Sewer Rehab
The city of St. Louis is rehabilitating some of the oldest masonry sewers in the country. The ongoing project includes all major types of sewer rehabilitation, including shotcrete, cast-in-place-pipe,...
SOS For Small-Town SSOs
No matter why a small town confronts its sanitary-sewer-overflow problems, solutions are bound by the town's own resources. For two Midwestern towns, hindsight shows that...
Designing for the First Flush
This article explains some of the details involved in separating the first flush of a storm event from the remainder of the storm. It also explains how to provide primary treatment of...
A Texas-Sized SSO Solution
Houston is under the gun to control chronic overflows in its sanitary-sewer-collection system--a wet-weather problem that has plagued the city for years. For a problem this massive, the...
Trenchless Relief
During wet weather, stormwater infiltration/inflow into the sewer system increases wastewater flows by 8-12 times the average dry weather flow in several interceptors operated by the Central...
Gust Speeds in Hurricanes
Based on strip-chart records of wind speeds representing 11 recording stations and four hurricanes, it is concluded that gust factors for hurricanes generally exceed the gust factors proposed...
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