TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/20.500.14365/4
Browse
5 results
Search Results
Article Experimental Investigation of Scour Hole Characteristics for Different Shapes of Piers Caused by Flood Hydrograph Succeeding Steady Flow(Turkish Chamber of Civil Engineers, 2021-03-01) Güney, M. Şükrü; Bor, AslıIn this study, the scour depth and dimensions of the scour hole around different shaped piers for the cases of hydrographs succeeding steady flow were studied experimentally. The experiments were carried out by using circular, square, rectangular, lenticular and rectangular with trapezoidal nose to compare the various scour hole geometries at the same flow conditions. Numerous experiments were conducted in a rectangular flume (18.6 m long, 0.80 m wide and 0.75 m deep) with different triangular shaped hydrographs. The flume bed of 26 cm thickness consists of uniform graded material with D-50 = 1.68 mm. The experiments were carried out in clear water conditions. The temporal variations of the equilibrium scour depths in front of the pier and the scour hole dimensions were recorded by two different cameras. The equilibrium scour depths at lateral sides and downstream of the piers were also measured. Regression analysis was performed in order to derive empirical relations to predict temporal variations of the scour depth in the case of unsteady flow. The shape factor values were also investigated based on the experimental findings and the obtained values were compared to those available in literature. The performance of the obtained empirical relation for circular pier was tested by using limited experimental data available in the literature. The smallest scour hole was observed for the rectangular with trapezoidal noses pier. The increase in the scour hole dimensions for other cross-sections was in the following order: rectangular with circular noses, circular, square and rectangular piers.Article Göl Kirliliği Probleminin Çözümü için Hızlı ve Güvenilir Bir Sayısal Yaklaşım(2025-07-15) Gümgüm, SevinSu, hava gibi çevrenin temel bileşenlerinden biridir ve su kaynaklarının bozulması tüm canlı organizmaları tehdit etmektedir. Bu nedenle su kirliliği sorununu araştırmak büyük önem taşımaktadır. Göller, su kaynaklarının büyük bir bölümünü oluşturmaktadır. Bu çalışmanın amacı, üç adet birbiriyle bağlantılı gölden oluşan bir sistemdeki kirlilik dinamiklerini Gegenbauer dalgacık yöntemi ile analiz etmektir. Problem, her bir göldeki kirlilik oranının zamana göre değişimini temsil eden üç doğrusal diferansiyel denklem sistemi ile modellenmiştir. Zaman türevlerine, kesikli Gegenbauer dalgacık serisiyle yaklaşılmış ve diferansiyel denklem sistemi, cebirsel denklem sistemine dönüştürülmüştür. Elde edilen sayısal sonuçlar, literatürde mevcut diğer sayısal sonuçlarla karşılaştırılarak önerilen tekniğin güvenilir ve hızlı olduğu gösterilmiştir. Ayrıca, yöntemin yüksek doğruluk sağladığı ve bu nedenle diğer ekolojik olayların çözümünde de kullanılabileceği ortaya konmuştur.Article Enriching Learning Experience Through Multidisciplinary Design Education: Structure Proposal for a Landscape Design Course(2020-07-01) Kaştaş Uzun, İpek; Uzun, Ipek KastasDesign related fields are quite intricate and it is hard to define strict boundaries in between thesedisciplines which cause the necessity of collaboration. Especially during professional careers, designerswork in multidisciplinary environments where they need to develop responses collaboratively. However,undergraduate design education is being criticized for missing to fulfill this need. The aim of this paperis to discuss the role and benefits of multidisciplinary design education with the example of the coursenamed “An Introduction to Contemporary Architectural Landscaping”. As the methodology of thepaper, through deconstruction of the 3 parted course structure and analysis of student works, this paperanalyses the role of a multidisciplinary education on students’ learning experiences. First two parts ofthe course focus on technical aspects of landscape architecture discipline, and cultural, physiologicaland psychological effects of landscape projects for users. Last part of the course focus on creating aplatform for students to work in collaboration with other students to gain practical experience in designfield where they develop a landscape architecture project on sites from their near environments. Thereare three main findings of the study. Firstly, inclusion of students from different disciplines in the samecourse increases the success rate via cross-learning experiences. Secondly, during design education,having the chance of participation to courses from different disciplines help to broaden students’perspectives on problem solving during design phase. Finally, projects in environments that studentsexperience in their everyday life increase their success rates. Results of the study that is based on theoutcomes of the course that is conducted with the students of two different design departments indicatethat this course structure and projects that are designed can be a guide for other design courses to developa multidisciplinary course structure to include students from different disciplines, enrich their learningexperiences and success after graduation.Article Experimental Investigation of the Partial Vegetation Effect on the Flood Wave Propagation Resulted From Dam Failure in Urkmez Residential Area by Means of Distorted Physical Model(2021-09-15) Güney, Mehmet Şükrü; Sevinç, EmrahThe purpose of this study is to investigate the effect of partial vegetation on the wave propagationresulted from sudden dam failure in a residential area. Temporal variations of water depths and floodwave propagation velocities were determined and compared with those obtained from theexperiments performed without vegetation. The experiments were performed on the distortedphysical model of Urkmez Dam and its downstream region. The distorted physical model withhorizontal scale of 1/150 and vertical scale of 1/30 contains the dam reservoir, the dam body, theresidential area of Urkmez coastal town until the sea and the partial vegetation. In the model, thereservoir has an active volume of 11.222 m3, the dam body has a length of 2.84 m and a height of 1.07m, and the downstream area is nearly 200 m2. Water depths were measured by e+ WATER L levelsensors placed at various locations of the downstream region. Velocities were measured by ultrasonicvelocity profilers (UVP) located near the level sensors. Flood wave propagation was recorded by thehigh definition digital camera. Experimental findings obtained from the physical model wereconverted to the prototype values, in nature. The changes in water depths and elapsed times, also thechanges in velocities and their occurrence times were determined for different zones of thedownstream area in the presence of vegetation. The experimental results revealed that in such a damfailure, the flood arrives at the sea in 6 s in the absence of vegetation, while in 10 s in the presence ofvegetation. These values correspond to 2.74 min and 4.57 min, respectively in the prototype. Theexistence of vegetation resulted in decrease in flood propagation velocities mainly in the denseresidential area, as expected. It was observed that the maximum water depths were increased at theleft bank and decreased at the right bank, except at level sensor S6 which is very close to the creek. Itwas observed that the maximum depth averaged velocities were decreased in the sparse and denseresidential areas. The existence of the vegetation changed considerably the local velocities duringrising and recession stages of the water depth. It was found that the order of magnitude of theprototype velocities was high and such velocities can cause serious damage mainly in the buildingsclose to the dam body. Because the presence of vegetation caused a decrease in flood propagationvelocities in the sparse and dense residential areas, it would reduce the damages on the buildings inthese areas.Article Is Production or Consumption the Determiner? Sources of Turkey’s Co2 Emissions Between 1990-2015 and Policy Implications(2021-09-29) Alkan, Ayla; Oğuş Binatlı, Ayla; Binatli, Ayla OgusTurkey’s CO2 emissions have been steadily increasing since the 1990s. Determining influences of socioeconomic factors behind thisincrease can help identify which sectors and what types of policies should be prioritized to go into action. This paper identifies themain contributors to CO2 emissions change within five-year intervals during 1990-2015 by adopting the Structural DecompositionAnalysis (SDA) method. The results show that CO2 emissions increase was driven by per capita expenditure and population factors,while emission coefficient factor had a reducing effect on emissions. As the production side factors fell pretty behind theconsumption side factors, net emissions were positive and the actual determiner in CO2 emissions was found as consumption. Themost contributing sectors were Electricity, Land Transportation and Mineral. Speeding up renewable energy investments andcontinuing energy efficiency measures, placing a carbon tax on electricity and oil consumption, promoting public transport and useof clean fuels and vehicles, slowing down construction and raising consumer awareness to change their consumption behavior,particularly to reduce demand for high emitting products and services should be the top priority policies.