REMODELING OF EXISTING SPILLWAYS (Part 1)

REMODELING OF EXISTING SPILLWAYS (Part 1) BY R.M.Khatsuria

Hydrotopics

 

(For similar topics refer http://hydrotopics.wordpress.com)

 

R.M.Khatsuria

(email: rmkhatsuria@rediffmail.com)

 

Though, all the aspects concerning hydrology, geology, topography and operational needs are taken into account while designing a spillway, eventually some spillways of  existing dams require remodeling. This may be due to a variety of reasons. The most prominent are:

·         Safety of the dam- This may be hydrologic safety or structural safety

·         Need for increasing the storage capacity of the reservoir

·         Environmental consideration, i.e. reducing fish mortality during overflow 

·         Replacement of aging components such as gates 

The most compelling case is concerning the hydrologic safety of the dam. In the last decade, existing dams were specifically surveyed in various countries to assess their safety. One of the most comprehensive surveys was conducted by the Corps of Engineers of the US Army (USACE), which included more than 80,000 dams. It was revealed…

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