Borçka Barajı Rezervuarında Yeni Oluşmuş Bir Sediment Birikim Sahasındaki Penetrasyon Direnç Değerlerinin Uzaysal Dağılımı

Authors : Bülent Turgut, Mehmet Özalp, Taşkın Öztaş

Pages : 298-308

Doi:10.15832/ankutbd.447604

View : 46 | Download : 12

Publication Date : 2017-09-01

Article Type : Research Paper

Abstract :This study was conducted to analyze vertical and horizontal spatial variability of penetration resistance insert ignore into journalissuearticles values(PR); in recently deposited sediments at Borçka Dam reservoir. Ninety-one grids with 50 m by 10 m were located and PR was measured to a depth 80 cm by 10 cm increment insert ignore into journalissuearticles values(8 layers); within each grid. Spatial variation of PR was assessed by geostatistical techniques in all 8 layers. Semivariograms of PR were constructed for all the layers and corresponding kriging maps were built. The PR values were greater in surface layer insert ignore into journalissuearticles values(0-10 cm); and gradually decreased by depth. Mean PR was greatest insert ignore into journalissuearticles values(0.747 MPa); in surface layer and lowest insert ignore into journalissuearticles values(0.413 MPa); in 61-70 cm insert ignore into journalissuearticles values(layer 7);. Results from exploratory statistics and geostatistical analyses showed that the PR values were more variable in surface layer compared to those in deeper layers due to that the surface layer was drier at the sampling and that affected by environmental factors in a greater extent. All the studied layers exhibited differences in spatial variation of PR as sill, nugget, and range values of corresponding semivariograms and kriging-predicted surface maps showed. The shortest geostatistical range insert ignore into journalissuearticles values(40.8 m); occurred of surface layer while longest insert ignore into journalissuearticles values(173.3 m); occurred for second layer insert ignore into journalissuearticles values(11-20 cm);. The nugget effect was greatest insert ignore into journalissuearticles values(44%); in third layer insert ignore into journalissuearticles values(21-30 cm); while lowest insert ignore into journalissuearticles values(13%); in the surface layer. The same study may be repeated with more variables to understand mechanisms behind development and extent of spatial variation in these newly deposited sediments.
Keywords : Compaction, Geostatistics, Kriging, Sediment, Semivariogram

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