Browsing Mühendislik ve Doğa Bilimleri Fakültesi by Author "DEMİR, Vahdettin"
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2D Taşkın Modellemesi, Samsun Mert Irmağı Örneği
DEMİR, Vahdettin; ÜLKE, Aslı (International Symposium on Urban Water and Wastewater Management, 2018-10-25)Taşkınlar sebep oldukları can ve mal kayıpları bakımından bütün dünyada olduğu gibi Türkiye'de de doğal afetlerin başında yer almaktadır. Dolayısıyla diğer afetlere olduğu gibi taşkınlara da hazırlıklı olmalıyız. Bunun ... -
Analysis of Annual, Seasonal, and Monhtly Trends of Climatic Data: A Case Study of Samsun
ÜLKE KESKİN, Aslı; BEDEN, Neslihan; DEMİR, Vahdettin (Nature Sciences, 2018-07)Climate change impacts are perceived today as being very noticeable; determination of precipitation, wind, flow, evaporation and temperature trends has become essential for water resources and engineering projects in ... -
Comparison Of 2d Hydraulic Models For Flood Simulation On The Mert River Turkey
BEDEN, Neslihan; DEMİR, Vahdettin; ALRAYESS, Hesham; KESKİN, Aslı Ülke (5th International Symposium on Dam Safety, 2018-10-27)As well as all over the world, Turkey exposures to floods more frequently as a result of climate change. The study area, Mert River is located in Samsun city north of Turkey and also frequently exposed to floods and flood ... -
Debi-Sürek Eğrisi Yardımıyla Taban Akımının Hesaplaması: Samsun Kürtün Irmağı Örneği
DEMİR, Vahdettin; TONA, Aziz Uğur (Avrupa Bilim ve Teknoloji Dergisi, 2021-04)Taban akımı yağış miktarı azaldığında veya kurak zamanlarda yağış olmadığında nehrin kurumasını engeller ve nehirdeki akışın devamlılığını sağlar. Ayrıca taban (baz) akımı çok yağış alan ve kar erimesinin uzun süre devam ... -
Determination of the River Basin Boundaries with the Help of GIS in Turkey
ÇAY, Faruk; DEMİR, Vahdettin; SEVİMLİ, Mehmet Faik (13th International Congress on Advances in Civil Engineering, 2018-09-12)The aim of the study is to establish an approach that the basin boundaries can be provided faster than classical methods. Today, the digital elevation model (DEM) can be formed by different methods. One of these methods ... -
Developing numerical equality to regional intensity–duration–frequency curves using evolutionary algorithms and multi‑gene genetic programming
ÇITAKOĞLU, Hatice; DEMİR, Vahdettin (Acta Geophysica, 2022-08-24)This study aims to carry out regional intensity−duration−frequency (IDF) equality using the relationship with IDF obtained from point frequency analysis. Eleven empirical equations used in the literature for seven climate ... -
Drought and Flood Analyses of Samsun City
DEMİR, Vahdettin; BİLGE, Hümeyra; SEVİMLİ, Mehmet Faik (International Conference on Civil and Environmental Engineering, 2017-05-08)The aim of this study is to analyze the flood and drought based on precipitation and streamflow data gathered from Samsun City, the most developed province of the Black Sea Region. Flood and drought analysis are important ... -
Ege Bölgesi Yaz Ayları Buharlaşma Verilerine Trend Analizi
ÇITAKOĞLU, Hatice; GEYİKLİ, Selim; DEMİR, Vahdettin (5. Uluslararası Katılımlı Toprak ve Su Kaynakları Kongresi, 2017-09-12)Bu çalışmada Ege Bölgesi’nde bulunan Afyonkarahisar, Uşak, Denizli, Muğla, Aydın ve İzmir illerine ait meteoroloji gözlem istasyonlarının, 1971 – 2014 yılları arası kaydedilen Temmuz ve Ağustos aylarına ait buharlaşma ... -
Enhancing monthly lake levels forecasting using heuristic regression techniques with periodicity data component: application of Lake Michigan
DEMİR, Vahdettin (Theoretical and Applied Climatology, 2022-02-21)This study investigates the accuracy of three diferent techniques with the periodicity component for estimating monthly lake levels. The three techniques are multivariate adaptive regression splines (MARS), least-square ... -
Flood Modeling by GIS Tools
BEDEN, Neslihan; DEMİR, Vahdettin; ÜLKE, Aslı (International Symposium on Multidisciplinary Studies and Innovative Technologies, 2017-11-04)In this study flood risks of Samsun Degirmen stream determinate by MIKE 11 and GIS. In this study, MIKE powered by DHI software used for numerical 1D modeling of study area. The hydrological and hydraulic data for the ... -
Flood Modeling of Samsun/Atakum Region by GIS Tools
BEDEN, Neslihan; DEMİR, Vahdettin; ÜLKE KESKİN, Aslı (JOURNAL OF NEW RESULTS IN SCIENCE (JNRS), 2018-05)Study area Samsun/Atakum province is almost under threat of flooding in each year. In this region, the main reason of devastating flood is the influence of the Degirmen stream especially during March, April, and July and ... -
Forecasting of solar radiation using different machine learning approaches
DEMİR, Vahdettin; ÇITAKOĞLU, Hatice (Neural Computing and Applications, 2022-09-23)In this study, monthly solar radiation (SR) estimation was performed using five different machine learning-based approaches. The models used are support vector machine regression (SVMR), long short-term memory (LSTM), ... -
Homogeneity and Trend Analysis of Long Term Temperatures in the Middle Black Sea Region
DEMİR, Vahdettin; ZEYBEKOĞLU, Utku; BEDEN, Neslihan; ÜLKE KESKİN, Aslı (13th International Congress on Advances in Civil Engineering, 2018-09-12)In this study long-term trend analysis of maximum and minimum monthly temperatures are determined in the Middle Black Sea Region of Turkey. Data is obtained from Turkish State Meteorological Service for the period of 1964 ... -
Impacts of climatic variables on water-level variations in two shallow Eastern Mediterranean lakes
YAĞBASAN, Özlem; YAZICIGİL, Hasan; DEMİR, Vahdettin (ENVIRONMENTAL EARTH SCIENCES, 2017-08-01)Variations in temperature and precipitation have direct impacts on the physical, chemical and biological characteristics of the shallow lakes. This paper examines the possible linkages between climate variables and the ... -
Karadeniz Yağışlarının Kuzey Atlantik Salnımı ile İlişkisi
YILMAZ, Cavit Berkay; DEMİR, Vahdettin; SEVİMLİ, Mehmet Faik (Gazi Mühendislik Bilimleri Dergisi, 2020-12-15)Kuzey Atlantik Okyanusu üzerinde meydana gelen KAS (Kuzey Atlantik Salınımı), okyanus yüzeyinde oluşan sıcaklık farklarının okyanus akıntılarıyla taşınarak ulaştığı bölgede hidrolojik parametrelere (sıcaklık ve yağış gibi) ... -
Manning Sürtünme Katsayısının Uzaktan Algılama Yardımıyla Elde Edilmesi (Samsun- Mert Havzası Örneği)
ÜLKE KESKİN, Aslı; DEMİR, Vahdettin (ULUSLARARASI MULTİDİSİPLİNER AKADEMİK ÇALIŞMALAR SEMPOZYUMU, 2019-04-19)In this study, it was aimed to form Manning Map as a result of determination by remote sensing techniques and Cowan method areas such as scrubland and greenery which are difficult to detect by using the SENTINEL-2 satellite ... -
Model-Ağacı (M5-tree) yaklaşımı ile HELIOSAT tabanlı güneş radyasyonu tahmini
DEMİRGÜL, Taha; DEMİR, Vahdettin; SEVİMLİ, Mehmet Faik (Geomatik, 15-02-20)Solar radyasyon (SR), enerji dönüşümü, meteoroloji, tarım ve hayvancılık ile ilgili çalışmalar için önemli bir parametredir. Solar radyasyonun belirlenebilmesi için gereken alıcıların tüm noktalar için temin edilememesinden ... -
Modeling of annual maximum flows with geographic data components and artificial neural networks
ÇUBUKÇU, Aslı; DEMİR, Vahdettin; SEVİMLİ, Mehmet Faik (International Journal of Engineering and Geosciences, 19-10-20)The flow rate at which the instantaneous maximum flow is recorded throughout the year is called the Annual Maximum Flow (AMF). These flow rates often cause disasters such as floods. Snow melts and extreme precipitation ... -
Neurocomputing intelligence models for lakes water level forecasting: a comprehensive review
DEMİR, Vahdettin; YASEEN, Zaher Mundher (Neural Computing and Applications, 2022-09-10)Hydrological processes forecasting is an essential step for better water management and sustainability. Among several hydrological processes, lake water level (LWL) forecasting is one of the significant processes within ... -
Numerical modeling of Samsun Mert River floods
ÜLKE, Aslı; BEDEN, Neslihan; DEMİR, Vahdettin; MENEK, Necati (European Water, 2017)Floods are considered one of the most important natural disasters after earthquakes in Turkey. As a result, there is currently great public interest in this issue and it is necessary to intensify research activities in ...
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