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Chapter 9 Hydraulic Structures - UDFCD

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September 2017 Urban Drainage and Flood Control District 9- i Urban Storm Drainage Criteria Manual Volume 2 Chapter 9 Hydraulic Structures Contents Structures in Streams ........................................ ........................................ ...................................... 1 Grade Control Structures ........................................ ........................................ ................................ 2 Overview ........................................ ........................................ ........................................ ........................... 2 Simplified Design Procedures for Drop Structures .

time, this change in hydrology may cause streambed degradation, otherwise known as down cutting or head cutting. Stabilization improvements to the strea m are necessary prior to or concurrent with development in the watershed. Stream stabilization is the third step of the Four Step Process to Stormwater Management (see

  Management, Stormwater, Hydrology, Stormwater management

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