Politeknik Dergisi 2147-9429 Gazi University 10.2339/politeknik.457958 Engineering Mühendislik Yeşilırmak Havzası Çakmak Barajı Rezervuarındaki Sediment Birikiminin Araştırılması A Study on the Reservoir Sedimentation of Çakmak Dam Located in the Yeşilırmak Basin Selek Zeliha Pınarlık Murat 09 01 2019 22 3 715 721 06 11 2018 Copyright © 1998, Journal of Polytechnic 1998 Journal of Polytechnic

Barajlarınekonomik ömrü, havzasından gelen sediment yüküne göre belirlenmektedir. Barajömrünü sonlandıran en büyük faktör, akarsu tarafından taşınan katı maddelerin(sediment, rüsubat, çökelti maddesi) baraj rezervuarının ölü hacmini doldurmasıdır.Bu çalışmada, Yeşilırmak Havzası Abdal akarsuyu üzerine inşa edilmiş ÇakmakBarajındaki sediment birikimi incelenmiştir. Baraj rezervuarının 1988 ve 2014yıllarına ait batimetrik haritalarından yararlanılarak NetCad 7.6 programı ilebelirli aralıklarla boykesitler alınmış ve taban profilleri çizilmiştir.Çizilen rezervuar taban profillerinden sediment etkisiyle oluşan kot farklarıtespit edilmiştir. Ayrıca, kot-alan-hacim yöntemi kullanılarak, 26 yıllıksüreçte rezervuar ölü, aktif ve toplam hacminde yer alan suyun hacimsel vealansal oluşan kaybı hesaplanmıştır. Sonuç olarak, baraj hacminin sediment iledolan hacmi elde edilmiştir. Elde edilen bulgulardan, sediment birikiminedeniyle rezervuar tabanında 10 metreye kadar yükselmeler meydana geldiğigörülmüştür. Barajın faydalı ömrünü belirleyen ölü hacminin yaklaşık olarak%30’unun sediment ile dolduğu belirlenmiştir.

The economic life of the dams is determined by thesediment load from their own basin. The most important factor terminating thelife of the dam is filling of dead volume of the reservoir by solid materials(sediment, sedimentation, deposit material) carried by the river. In this study, sediment deposition in Çakmak Dambuilt on Abdal stream of Yeşilırmak Basin was investigated. Using thebathymetric maps of the dam reservoir belonging to 1988 and 2014 years, thebottom profiles and cross-sections at regular intervals were drawn by usingNetCad 7.6 program. The elevation differences occurred by sediment loads weredetermined from drawing bottom profiles. In addition, using theelevation-area-volume method, the volumetric and areal losses of water inreservoir dead, active and total volume for 26 years were calculated. As aresult, the volume of the dam was filled with the sediment. From the results,it has been observed that up to 10 meters of elevation occurs on the bottom ofthe reservoir due to sediment deposition. Approximately 30% of the dead volume determining the useful life of thedam was filled with sediment.

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