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Geosynthetic materials play a major role in new underground stormwater detention system
June 1st, 2010
By Terence G. Sheridan, P.E. Introduction Stormwater management is an ever-increasing expense on site development projects. Stormwater detention ponds are designed to protect against downstream flooding and environmental degradation. The standard of practice is to ensure that post-development flow from a site does not exceed the pre-development rate for a given storm event. Where land […]
Retractable geomembrane covers provide multiple efficiencies for Bay Area wastewater plant
June 1st, 2010
A retractable, structurally-supported geomembrane cover system provides odor control and ease of maintenance access for the Vallejo Sanitation and Flood Control District. By Jim McMahon Introduction The initial goal was to contain odors from its wastewater treatment plant. What the Vallejo (Calif.) Sanitation and Flood Control District (VSFCD) eventually realized is a fully retractable, structurally-supported […]
Geosynthetic reinforced walls and steep slopes: Is it magic?
June 1st, 2010
By Dov Leshchinsky Introduction The history of humankind indicates that most people, arguably, embrace magic. Adding exotic ceremonies turns magic into voodoo. While magic is based on uncritical thinking, relying on it in engineering is undesirable because it could lead to overly expensive structures or, worse, unsafe practice. Hence, designers use rules stemming from mechanics […]