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İstanbul Teknik Üniversitesi (2011)

Reducing Sedimentation Deposit In Rezervoirs And Extending Effective Life Of Reservoirs

ODABAŞI Burcu

Titre : Reducing Sedimentation Deposit In Rezervoirs And Extending Effective Life Of Reservoirs

Rezervuarlarda Sediment Birikiminin Önlenmesi Ve Rezervuar Ekonomik Ömrünün Uzatılması

Auteur : ODABAŞI Burcu

Université de soutenance : İstanbul Teknik Üniversitesi

Grade : Master of Science (MS) 2011

Résumé
As a result of accumulation of sediment deposits decreases worldwide reservoir storage by 1% per year. A rough estimate for the loss of storage due to sedimentation and the cost of replacing lost storage is estimated to be $130 billion and their service time falls to 22 years according to various researchers in 1987. This loss of reservoir storage reduces the effective life of dams and diminishes benefits for flood control, hydroelectricity generation, irrigation, water supply, and recreation. At the same time, sediment deposition within the resorvoir extends upstream and up tributaries, raises local ground-water tables, reduces channel flood capacity. In our country which has a semi-drought season and a strict topogrophy, sedimentation is a serious problem. Amount of the sediment deposition in Turkey is around 450 million tons due to researchers. Shorter economic use of dams creates a need for new ones. But improving the storage capacity of existing reservoirs is more important issue rather than building new reservoirs because of high costs of construction and absence of suitable dam site. Reducing sediment enterance to reservoirs solves sedimentation problem. But these techniques are very expensive and have long term results. There are also hydraulic and mechanic techniques with advantages of low-cost, and maintanence. They are preferred for their sustainability and feasability in recent years. Also beyond applications, there are studies on improving those methods. In short, content of this thesis is a comprehensive study about methods and techniques that focus on sedimentation which shortens economic use of reservoirs, and dams. Also it is examined of the discussed methods results respond to the applications in the country and also in all around the world.

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