Bor Türkben, Aslı

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Profile URL
https://hdl.handle.net/20.500.14365/7608
Name Variants
TURKBEN, Asli BOR
Türkben, Aslı Bor
Bor,Asli
Bor Turkben, Asli
Turkben, A. Bor
Bor,A.
Bor, Aslı
Job Title
Email Address
asli.turkben@ieu.edu.tr
Main Affiliation
05.03. Civil Engineering
Status
Current Staff
Website
ORCID ID
0000-0002-1679-5130
Scopus Author ID
57203956151
Turkish CoHE Profile ID
9DC2139DA88CC9F4
Google Scholar ID
sEfD7xYAAAAJ
WoS Researcher ID
F-2987-2015
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Asli_Bor_Turkben.jpg (9.7 KB)

Sustainable Development Goals

NO POVERTY1
NO POVERTY
0
Research Products
ZERO HUNGER2
ZERO HUNGER
0
Research Products
GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
1
Research Products
QUALITY EDUCATION4
QUALITY EDUCATION
0
Research Products
GENDER EQUALITY5
GENDER EQUALITY
0
Research Products
CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
3
Research Products
AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
5
Research Products
DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
2
Research Products
INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
REDUCED INEQUALITIES10
REDUCED INEQUALITIES
0
Research Products
SUSTAINABLE CITIES AND COMMUNITIES11
SUSTAINABLE CITIES AND COMMUNITIES
5
Research Products
RESPONSIBLE CONSUMPTION AND PRODUCTION12
RESPONSIBLE CONSUMPTION AND PRODUCTION
2
Research Products
CLIMATE ACTION13
CLIMATE ACTION
3
Research Products
LIFE BELOW WATER14
LIFE BELOW WATER
0
Research Products
LIFE ON LAND15
LIFE ON LAND
0
Research Products
PEACE, JUSTICE AND STRONG INSTITUTIONS16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
PARTNERSHIPS FOR THE GOALS17
PARTNERSHIPS FOR THE GOALS
0
Research Products
Documents

20

Citations

152

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6

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Documents

21

Citations

144

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Scholarly Output

25

Articles

17

Views / Downloads

137/633

Supervised MSc Theses

2

Supervised PhD Theses

0

WoS Citation Count

61

Scopus Citation Count

81

Patents

0

Projects

2

WoS Citations per Publication

2.44

Scopus Citations per Publication

3.24

Open Access Source

14

Supervised Theses

2

JournalCount
Water5
Proceedings of the IAHR World Congress2
Applıed Artıfıcıal Intellıgence1
Canadıan Journal of Cıvıl Engıneerıng1
Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi1
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Now showing 1 - 10 of 25
  • Thumbnail Image
    Article
    Citation - WoS: 4
    Citation - Scopus: 5
    Experimental Investigation of 90 Degrees Intake Flow Patterns With and Without Submerged Vanes Under Sediment Feeding Conditions
    (Canadian Science Publishing, 2022-03) Bor Türkben, Aslı; Bor, Aslı
    In this study, two experiments were conducted ina 90 degrees water intake to study 3D flow patterns and sediment distribution using submerged vanes under sediment feeding and live-bed conditions. One column three vanes were installed at a 20 degrees angle maintaining for a water discharge ratio of qr = 0.1. Three-dimensional mean and turbulent velocity components of flow ina 90 degrees channel intake were measured using acoustic Doppler velocimetry (ADV). Flow characteristics of the intake structure area with no vanes were compared with these conditions. Results showed that three vanes with a single column reduced the amount of sediment by 20% during intake diversion. In the downstream corner of the intake, high velocities were measured where scouring occurred. The vanes affected the intensity of secondary flow, turbulence energy, flow separation, and moved sediment deposition downstream of the main channel.
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    Article
    Citation - Scopus: 1
    Exploring Hydrological Response To Land Use/Land Cover Change Using the SWAT Plus Model in the İznik Lake Watershed, Türkiye
    (MDPI, 2025-06-27) Tezel, Anil Caliskan; Akpinar, Adem; Bor,Asli; Alfredsen, Knut Tore
    Land use/land cover (LULC) changes significantly affect hydrological processes in watersheds. In this study, the Soil and Water Assessment Tool (SWAT+) model was employed to investigate the hydrological response to LULC changes in the & Idot;znik Lake Watershed, a region of significant environmental and social importance in the Marmara Region of T & uuml;rkiye. This study provides a novel understanding of water balance dynamics of the & Idot;znik Lake Watershed through hydrological modeling. The SWAT+ model was calibrated and validated against observed monthly flow data from two gauging stations using three objective functions: Nash-Sutcliffe efficiency (NSE), Kling-Gupta efficiency (KGE), and the percent bias (PBIAS). The model was utilized to evaluate the impacts of LULC change on water balance components such as surface runoff, percolation, lateral flow, water yield, and evapotranspiration. The results revealed that the expansion of urban areas and reduction in forest land have led to an increase in surface runoff and a decrease in lateral flow and percolation, which in turn have impacted the overall water yield of the watershed. The findings of this study can inform land use planning and management decisions to mitigate the negative impacts of LULC changes on water resources in the & Idot;znik Lake Watershed and similar regions.
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    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, Aslı
    In 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.
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    Article
    Citation - WoS: 3
    Citation - Scopus: 4
    Experimental and Numerical Investigation of Local Scour Around Square Bridge Pier
    (Taylors Univ Sdn Bhd, 2022) Bor Türkben, Aslı; Güney, Mehmet Şükrü; Bor, Asli
    This study examines, local scour around square pier under unsteady flow conditions, caused by five different hydrographs. The experiments were conducted in the rectangular flume of 18.6 m length, 0.80 m width and 0.75 m depth, with uniform sediment bed material D-50 = 1.68 mm. Five experiment series were conducted with a plexiglass square pier b = 8.5 cm. The unsteady flow was generated by means of triangular hydrographs. 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 pier were also measured. The hydrograph peak flow rates were found to be much more effective compared to hydrograph durations. The numerical solution was realized by using the software ANSYS FLUENT with RNG k-epsilon turbulence model. The numerical and experimental values were compared and interpreted, and acceptable accordance was observed between them. The calculated lengths and widths of the scour hole were found close to the measured ones. A comparison of the final elevations (t = 15 min.) for experimental and numerical results revealed that; the values of RMSE, MAE errors, and the determination coefficient R-2 were 0.53 cm, 0.48 cm, and 0.94 respectively. The R-2 values are 0.98 and 0.95 for the measured and calculated scour hole length (L) and width (W), respectively.
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    Article
    Denizli Buldan Barajı Sarıgöl Sulaması İsale Hattı Su Darbesi Analizleri
    (2021-05-24) Bor Türkben, Aslı; Bor, Asli
    Sulama iletim hatlarında, suyun aniden açılması veya aniden kesilmesi durumları hat içerisinde anibasınç değişimlerine neden olabilir. Su darbesi denilen bu olay, akışkan koşullarınınmomentumundaki ani değişiklikler veya değişikliklerle ilişkili olarak iletim hattındaki basınçdalgalarının üretilmesini, yayılmasını ve yansımasını tanımlar. İletim hattındaki kontrolsüz bir sudarbesi hattın hasar görmesine neden olabilir, ekipmanlara zarar verebilir ve hatta can kaybına nedenolabilir. Hatların proje aşamasında su darbesinin modellenmesi ve gerekli önlemlerin alınmasıönemlidir. Bu çalışma kapsamında, Denizli Buldan Barajı Sarıgöl Sulaması İsale hattının su darbesianalizleri yapılmıştır. Buldan barajı ile regülatör arasındaki yaklaşık 3400 m’lik iletim kısmı, 2740 ha(brüt), 1870 ha (net) saha alanına sulama hizmeti verecek olan Sarıgöl isale hattı, yoğun olarakmansap deresine karışan sediment ve bunun sonucunda sulamayı olumsuz olarak etkilemesinedeniyle kapalı borulu olarak yapılması tasarlanmıştır. Bu amaçla, basınçlı sistemlerde yaygın olarakkullanılan karakteristikler metodu adı verilen matematiksel yöntem kullanılarak, zamanla değişenakım şartları altında analizler yapılmıştır. Su darbesini kütle korunum diferansiyel denklemlerininkarakteristik metodu için oluşturulan algoritmayı içeren bilgisayar kodu yazılmıştır. Bu programkullanılarak, bir rezervuar boru vana için su darbesi analizi yapılmıştır ve iletim hattının, su darbelerinedeniyle meydana gelen basınç değişimleri hesaplanmıştır. Bu analizler sonucunda hattayerleştirilmesi gereken enerji kırıcı vanaların yerleri ve vana kapanma süreleri önerilmiştir.
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    Article
    Citation - WoS: 3
    Citation - Scopus: 3
    Investigation of Improved Energy Dissipation in Stepped Spillways Applying Bubble Image Velocimetry
    (MDPI, 2024-08-28) Mikalsen, Lars Marius; Thorsen, Kasper Haugaard; Bor, Asli; Lia, Leif
    This study investigates skimming flow regimes, two-phase air-water flow conditions, and simple measures to improve energy dissipation in stepped spillways. Experiments were conducted using two different scale physical models, 1:50 and 1:17, within separate rectangular flumes to define scale effects. Flow patterns were analyzed using the Bubble Image Velocimetry (BIV) technique, which tracks air bubbles. The introduction of splitters resulted in a 7% increase in relative energy dissipation. Additionally, the length of inception was reduced to Li/ks = 10, thereby decreasing the potential for subsequent cavitation. Beyond the BIV experiments, two experiments were conducted on the large-scale model using Acoustic Doppler Velocimetry (ADV), with and without splitters, to examine the impact of splitters on the velocity profile above the crest. In the experiment with splitters, the vertical velocity vector (v) contributed to turbulence by changing direction, thereby reducing average velocities both in front of and behind the ogee crest. This led to a reduction in energy on the downstream side of the spillway. Although the small-scale model appears unsuitable for studying two-phase flow, the change in relative energy dissipation from the baseline to the splitter configuration was practically identical for both scale models, thereby supporting the findings of the large-scale model.
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    Conference Object
    Citation - Scopus: 1
    Application of Artificial Neural Network for Predicting Peak Discharge from Breached Embankment Dam
    (International Association for Hydro-Environment Engineering and Research (IAHR), 2024) Okan, M.; Bor, A.; Tayfur, G.
    Estimation of peak discharge is a key parameter for risk assessment in case of dam failure, and has attracted great attention from researchers in recent years. Many formulas are available in the literature, but these cannot cover all experimental scenarios. Existing models are typically inadequate to address the complexities of dam breaches. This research attempted to predict the peak discharge in the breached embankments with an artificial neural network (ANN) model, which is effective in nonlinear problems, using datasets obtained from various dam breaches cited in the literature. The ANN model is useful in the preparation of emergency action plans since it enables prediction of peak discharge. Multilayer Perceptron (MLP) with Levenberg-Marquardt (LM) and Bayesian Regularization (BR) algorithms was used to predict peak discharges from breached embankments. The dataset was divided into three: 56% for training, 20% for validation and 24% for testing. Different scenarios were created using different input combinations. Performance evaluation was based on the root-mean squared error (RMSE), percent bias (PBIAS), determination of coefficient (R2), Nash-Sutcliffe efficiency (NSE) and RMSE-observations standard deviation ratio (RSR). A comparison of training algorithms revealed that LM showed the best performance when the best ANN was selected from 1000 networks. Volume of water above the breach bottom (Vw) had a greater effect on model performance than the depth of water above the breach bottom (Hw). The best performance was obtained when both Vw and Hw were used as input. © 2024 ISHS. All Rights Reserved.
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    Article
    Citation - WoS: 10
    Citation - Scopus: 12
    Impacts of Construction of Dam on the Flow Regimes and Water Quality: a Case Study From Turkey
    (Springer, 2022-02-01) Bor Turkben, Asli; Elci, S.; Bor, A.
    Dam construction has important positive and negative effects on the environment, including physical changes of the riverbed morphology, changes in sediment transport patterns and water quality, and the river ecosystem in general. The primary objective of this study is to present a methodology to assess the impacts of construction and operation of cine Dam, in Aydin, Turkey, on the river flow regimes, sedimentation, and water quality of the downstream reach of Buyuk Menderes River. Construction of the dam significantly reduced the sediment load from the cine tributary to the main reach, as expected. To evaluate changes in the water quality of the cine River, five different water quality index methods are compared before and after the dam operation: Weighted Arithmetic Index (WAI-WQI), Canadian Council of Ministers of the Environment Water Quality Index (CCME-WQI), Universal Water Quality Index (UWQI), Oregon Water Quality Index (OWQI) and Aquatic Toxicity Index (ATI). ATI and CCME-WQI methods are found to be more appropriate for the 10-year water quality assessment of the river.
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    Article
    Hydraulic Scale Modeling of Pressurized Sediment Laden Flow
    (MDPI, 2025-06-30) Gebrelibanos, K.G.; Vereide, K.; Weldemariam, S.A.; Bor, Aslı; Tesfay, A.H.; Lia, L.
    In hydropower tunnel systems, unlined pressurized tunnels in competent rock are commonly used for cost-effective construction. Incorporating pressurized sand traps at the downstream end of these tunnels can increase plant capacity and improve energy efficiency. The present work focuses on optimizing the performance of existing pressurized sand traps. Hydraulic scale models were developed and tested at the Hydraulic Laboratory of NTNU, Within the 960 MW Tonstad Hydropower Plant in southern Norway as a case study. This study compares 1:1 velocity/sediment scaling with Froude scaling through physical experiments, analyzing velocity profiles via Particle Image Velocimetry (PIV) and sediment trap efficiency. Results show that Froude scaling, combined with geometric sediment scaling, provides superior accuracy in trap efficiency scaling across varying factors. However, in many practical hydropower applications, the large scaling factor required for laboratory models results in very small model sediments, leading to cohesion limitations. In such cases, Froude scaling may not be feasible. The 1:1 scaling method provides a conservative alternative. Hence, for practical applications, 1:1 scaling may be more cost-effective and sufficient for designing pressurized sand traps. This study emphasizes the importance of accounting for unscaled parameters and flow phenomena in hydraulic model design. © 2025 by the authors.
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    Conference Object
    Citation - WoS: 2
    Citation - Scopus: 3
    Experimental Study of the Evolution of the Breach and the Discharge Through the Breach Resulting From Piping Due To Seepage at the Earth-Fill Dam Top
    (International Association for Hydro-Environment Engineering and Research, 2022) Güney, Mehmet Şükrü; Okan, Merve; Dumlu, E.; Bor Türkben, Aslı; Aklık, Pelin; Tayfur, G.; Bor, Asli; Tayfu, Gokmen
    Internal erosion, also known as piping, is one of the most important causes of earth-fill dam breaks. Many researchers dealing with numerical analyses in this area make some simplified assumptions about the shape of the breach and the discharge of water flowing through the breach. This study was conducted in the scope of the project supported financially by the Scientific and Technological Research Council of Turkey and it consists of experimental study which aims to provide data needed to perform numerical analyses with more realistic approaches. A dam with a height of 0.6 m, a bottom width of 2 m and a crest width of 0.20 m was built in a flume 1 m wide, 0.81 m high and 6.14 m long. Before the construction of the dam, some common soil mechanics tests were carried out. The dam was constructed by using a mixture consisting of 85 % sand and 15 % clay. A circular tunnel with a diameter of 2 cm was created along the centerline at 6 cm below the dam crest. In the closed system, water was pumped from the lower reservoir to the upper channel. Six cameras located at different locations recorded the evolution of the dam failure. Gauss Area formula was applied to determine the time-varied of the breach areas at upstream and downstream sides. The discharge of water through the breach and average flow velocity were determined by using the continuity equation. The changes in water depth in the channel were also recorded. © 2022 IAHR.