Serife Yurdagul Kumcu

Necmettin Erbakan University · Civil Engineering

A detailed investigation has been conducted to study the shift location of the point of the maximum scour depth for both bridge abutment-collar and pier-collar arrangements. In the present study, an experimental program has been conducted for abutment-collar arrangements and additionally, the data obtained from the literature for the pier-collar ar...

There are many empirical, semi-empirical and mathematical methods that have been developed to estimate sediment yield by researchers. In the last decades, the advancement in computer technologies has increased the use of mathematical models as they can solve the system more rapidly and accurately. The Soil and Water Assessment Tool (SWAT) is one of...

The main aim of this study was to investigate the flow over an ogee spillway experimentally and simulating by both ANFIS and numerical model. An experimental study was conducted in order to obtain discharges and flow depths over an ogee spillway. Discharges and flow depths of flow in physical model were measured for 16 different total heads. A comp...

In this paper, hydraulic characteristics of Yedigöze Dam and Hydroelectric Power Plant (HEPP), which are producing energy in Turkey, were investigated experimentally by physical model studies. The 1/70-scaled physical model was used in conducting experiments. Flow depth, discharge and pressure data were recorded for different flow conditions. Serio...

The Arkun Dam spillway and HEPP, located on the Çoruh River in north east of Turkey, was selected to conduct the comparison for hydraulic characteristics. This dam is planned and built to produce 780 GWh energy per year with 245 MW installed capacity. The experiments with 1/60-scaled physical model set up in Hydraulic Laboratory of State Hydraulic...

The flow passing under a sluice gate can be in two states, free flow and submerged flow. If the regime of the flow changes from subcritical to supercritical then a submerged hydraulic jump can occur near the gate. Due to the strong turbulence forces inside submerged hydraulic jump, it will be difficult to determine flow heights and velocities by us...

In Bahcelik Dam, irrigation and drinking water is discharged from the bottom outlet to diversion channel when the reservoir water surface elevation is between 1472 m and 1500 m. It was planned that the flow discharge would be automatically controlled by the valves depending on the water demand. In this system, the valve type is characterized by ope...

Z Düşülü bacalar, kanalizasyon ya da yağmur suyu gibi basınçsız akan borulu sistemlerde, hattın yönünü değiştirmek, düşü sağlamak ve enerji kırmak amacı ile kullanılan, genellikle dairesel kesitli imal edilen su yapılarıdır. Çalışma prensiplerinde akımın içinde oluşan hava miktarı önemlidir. Bu çalışma kapsamında, dairesel kesitli düşülü bacaların,...

Sediment transport in streams and rivers takes two forms as suspended load and bed load. Suspended load comprises sand + silt + clay-sized particles that are held in suspension due to the turbulence and will only settle when the stream velocity decreases, such as when the streambed becomes flatter, or the streamflow into a pond or lake. The sources...

The flow characteristics of the subcritical and supercritical flows over an unconfined free overfall in a rectangular channel are presented with experimental data available in the literature. The experimental observations cover a wide range of flow rate on mild, steep and adverse slopes. The dependence of the ratio of the brink depth to the critica...

As a part of design process for hydro-electric generating stations, hydraulic engineers typically conduct some form of model testing. The desired outcome from the testing can vary considerably depending on the specific situation, but often characteristics such as velocity patterns, discharge rating curves, water surface profiles, and pressures at v...

Bridges are vital components of the transportation network and if they are damaged or destroyed during a flood, they isolate communities and limit movement of supplies and emergency services. Evaluating their constructional stability and structural response after a flood event is critical for bridge safety. Bridge studies are usually designed with...

Flow in the open channels has great importance in the hydraulic engineering. Any disturbances as contractions and expansions affect the flow characteristics like velocities, flow rates and water surface profiles. Their effects on the flow must be considered during the design process of flow structures. In the last decades numerical solutions become...

This paper compares the analyses of data from reservoir surveys and from sediment rating curves to predict sediment yield in three large reservoir watershed areas in Turkey. Sediment yield data were derived from reservoir sedimentation rates and suspended sediment measurements at gauging stations. The survey data were analysed to provide the volume...

The cause of local scour around a bridge abutment is mainly the presence of spiraling vortex flow structure called the principal vortex. A rigid surface around an abutment with a collar can arrest the growth of the vortex, and therefore, reduces the scour depths around the abutment compared to the case without a collar. This paper presents an exper...

Circular dropshafts, commonly used in urban storm water systems for energy dissipation and flow control, are characterized by significant flow aeration. In the laboratory, a series of experiments were performed in a circular dropshaft having two identical horizontal inflow and outflow circular channels having diameters of d=0.12 m, and a circular d...

The Hirfanlı Dam Reservoir is located on the Kızılırmak River in the central part of Turkey and has a storage capacity of 5.98x109 m3 at Normal Water Surface Elevation. Construction of the dam was started in 1953 and completed in 1959. In the present study, reservoir sedimentation in the Hirfanlı Dam was assessed by two ways; firstly comparison was...

This study investigated the reduction of scour around a vertical-wall bridge abutment using rectangular collars for clear-water flow conditions over uniform sediment particles in a laboratory flume. Collars of different sizes and at different elevations were tested to determine the temporal variation of scour depth around the bridge abutment. The d...

The Demirköprü Reservoir is located on the Gediz River in West Central Turkey and has a storage capacity of 1.32x109 m3 at Normal Water Surface Elevation. Construction of the dam was started in 1954 and completed in 1960. Sediment accumulation within the Demirköprü Reservoir influences the operation life of the dam. In the present study, reservoir...