05. Manning Equation Comparison The Manning Equation can be applied using three methods, but which method should be used? Laboratory results have shown that these methods provide similar results under uniform flow conditions. However, only the Stevens-Schutzbach Method describes the relationship between depth and velocity under non-uniform flow conditions caused […]
Daily Archives: November 12, 2018
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04. Stevens-Schutzbach Method The Stevens-Schutzbach Method is an iterative regression technique used to fit the Manning Equation to flow monitoring data. This method can be applied to data obtained under non-uniform flow conditions resulting from downstream obstructions or dead dogs. This method is demonstrated here using four iterations. The magnitude […]
03. Lanfear-Coll Method The Lanfear-Coll Method uses a regression technique to fit the Manning Equation to flow monitoring data. This method can be applied to data obtained under uniform flow conditions and requires no direct knowledge of the roughness coefficient (n) or slope (S). This method is demonstrated here and […]
02. Design Method The Design Method is a traditional use of the Manning Equation and requires information regarding the roughness coefficient (n) and the pipe slope (S). These values are obtained from design or as-built records. The resulting pipe curve is then compared to actual flow monitoring data. This method […]
01. Manning Equation The Manning Equation is an empirical formula that describes a relationship between depth and velocity under ideal conditions and is commonly used to design sewer systems. This relationship is depicted here as a pipe curve and provides a convenient reference to evaluate flow monitoring data. The Manning […]
World Trade Center Attack September 11, 2001 is a defining moment in U.S. history, and its memories and emotions echo through the words of the 9/11 Commission: At 8:46 on morning of September 11, 2001, the United States became a nation transformed. An airliner traveling at hundreds of miles per […]