Yazar "Canoglu, Mustafa Can" seçeneğine göre listele

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    A NEW ARTIFICIAL NEURAL NETWORK MODEL FOR THE PREDICTION OF THE RAINFALL-RUNOFF RELATIONSHIP FOR LA CHARTREUX SPRING, FRANCE
    (Parlar Scientific Publications (P S P), 2018) Inan, Cagri Alperen; Canoglu, Mustafa Can; Kurtulus, Bedri
    The prediction of a rainfall-runoff relationship includes complex processes in karstic aquifer systems. In this study, an artificial neural network (ANN) model is utilized in order to simulate the rainfall -runoff relationships of La Chartreux spring in the karstic region Cahors, Southern France. Since numerical models are thought to be insufficient, the present study will contribute to the improvement of rainfall-discharge prediction models by using ANNs in MATLAB software. The model has been conducted with a feed forward and back propagation algorithm. The model is improved by the Levenberg-Marquardt algorithm in order to generalize the complex and non-linear rainfall-runoff issues. The meteorological data was obtained from meteorological stations in the region including eight years of rainfall and discharge data between 1976 and 1983. Model performance has been evaluated with respect to statistical error measures (root mean square error (RMSE), and correlation coefficient square (R-2). This study confirmed that artificial neural networks are capable of predicting rainfall-runoff relationships depending on the data quality, neural network properties, and data variability.
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    ASSESSMENT OF AQUIFER RECHARGING USING DAMS IN TERMS OF GEOTECHNICAL CHARACTERIZATION AND HYDROGEOLOGICAL CONDITIONS IN ARID REGIONS
    (Parlar Scientific Publications (P S P), 2019) Canoglu, Mustafa Can
    Under favour of advancing pumping technologies, groundwater is utilized all around the world for many purposes such as agriculture, potable water supply, industry etc. Due to the benighted use of groundwater, irreparable damages are occurred in phreatic surfaces. To recover the decreased groundwater level water retaining structures are widely used for aquifer recharge. In this study, feasibility stage design of groundwater recharge Wadi Keed dam (Bahla, Sultanate of Oman) was assessed considering hydrogeological conditions and geotechnical parameters of dam location and proximity. Within this context, field, office, and laboratory works had been conducted. Field works consist of a drilling program, excavation of trial pits and in-situ tests such as falling head permeability tests and Lugeon tests. The laboratory works had been performed on the core samples handled from the drill-holes and the soil samples obtained from trial pits. In context of office studies, the results obtained from field and laboratory works had been evaluated and the recharge dam was designed based on the geotechnical properties and hydrogeological conditions of dam location. In this regard, Wadi Keed dam is optimized for a groundwater recharge purpose based on the geotechnical and hydrogeological data. It is predicted to percolate 400 000 m(3) water per year for recharging the Bahla aquifer and this percolation will uplift 8 m the phreatic surface around Bahla City.
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    ASSESSMENT OF HEAVY METAL CONTAMINATION AND ACCUMULATION PATTERNS IN THE COASTAL AND DEEP SEDIMENTS OF LAKE SALDA, TURKEY
    (Parlar Scientific Publications (P S P), 2017) Caldirak, Huseyin; Kurtulus, Bedri; Canoglu, Mustafa Can; Tunca, Evren
    In this study, contamination levels were found for 8 different metals (Cu, Pb, Zn, Ni, Mn, Fe, Cd, Cr) and metalloids (As) in sediment samples, coming from 9 different stations, through statistical analysis and sediment assessment at Lake Salda (Turkey). The correlation, cluster, factor and Mann Whitney-U analysis were used for evaluation of the results, and the values of all metals were compared with the limit values of PEL (probable effect level), ERM (effect range median), TEL (threshold effect level), and ERL (effect range low). According to the correlation, PCA and cluster analysis, highest correlation was determined as being between Cu-Mn, Cu-Zn, Fe-Ni, Cr-Ni and Fe-Cr. The weakest relationships with other metals were identified as Pb and As. Additionally, deep and shallow stations were compared and station-based anthropogenic effects were demonstrated. The status of the sediments was considered separately for the studied elements. According to the results, contamination factor, enrichment factor, geoaccumulation index, potential ecological risk factor and quotient toxic unit showed up the highest values for Ni. However, Pb results seemed quite serious at several stations according to the results of the research. The pollution load index was used to find out the baseline and ideal levels throughout the lake.
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    DETERMINISTIC LANDSLIDE SUSCEPTIBILITY ASSESSMENT WITH THE USE OF A NEW INDEX (FACTOR OF SAFETY INDEX) UNDER DYNAMIC SOIL SATURATION: AN EXAMPLE FROM DEMIRCIKOY WATERSHED (SINOP / TURKEY)
    (Carpathian Assoc Environment And Earth Sciences, 2017) Canoglu, Mustafa Can
    Landslides are important natural hazard in Turkey especially in Black Sea Region considering the economic damages and life loss. Sinop city enlarge through hillslope areas with its increasing population. The study area is located in Demircikoy Watershed approximately 11 km southwest of Sinop city centre which embodies several landslides. The aim of the work presented in this paper is to propound a new index representing the deterministic part of the landslide susceptibility phenomenon in terms of FSI (factor of safety index) under dynamic soil saturation conditions. SMDR (Soil Moisture Distribution and Routing) model is employed to simulate the dynamic soil saturation variations utilizing with the monthly mean meteorological data. The calculated dynamic factor of safety is transformed to the FSI with the use of a statistical evaluation known as likelihood ratio method. The ultimate landslide susceptibility maps obtained with the new proposed method indicate that deterministic approach produce fairly acceptable results in terms of physical explanation of landslide existence. On the other hand, spatiotemporal evaluation of the landslide susceptibility concept augment the accuracy comparing with the conventional landslide susceptibility concept according to the produced high performance and satisfactory results.
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    Engineering approaches for road construction projects and determination of geotechnical design parameters: Road network improvement of northern Iraq
    (Academic Publication Council, 2022) Canoglu, Mustafa Can
    Transport in northern Iraq becomes an important issue in terms of trading due to its geographical position. Road construction between Darbandikhan and Kalar villages in the northern part of Iraq is crucial for the connection of Erbil and Suleymaniye to northeast. The planned road construction requires a detailed environmental and geotechnical study in order to determine geo-engineering parameters of ground conditions. For this purpose, this study is carried out to highlight the engineering geological and geotechnical features considering the groundwater conditions of the Darbandikhan-Kalar road route section. In this context, field and laboratory works were performed along the projected route. Within the scope of field studies, an engineering geology map was generated, a suitable routing was specified, and drilling and in-situ testing was completed. Seven boreholes and total of 196,5 m geotechnical purposed drilling works were performed along the planned route section. The core samples obtained from drilling works are utilized for laboratory testing. As a result of this study information about the bearing capacity, slope stability and basic soil parameters were determined and no problems were encountered.
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    FEASIBILITY STAGE DESIGN ASSESSMENT FOR TRANSFORMING AN UNPRODUCTIVE DAM INTO A SANITARY LANDFILL SITE
    (Parlar Scientific Publications (P S P), 2018) Canoglu, Mustafa Can; Baki, Oylum Gokkurt
    In many cities in Turkey, a lack of provision made for waste services is often the result of inadequate financial resources, and a lack of management and technical skills within individual municipalities. Unexpected influxes of refugees, especially, means that the planned limits for waste management by government authorities are exceeded, despite these being in place to deal with rapid growth in demand for waste management services. Urban solid wastes increase in correlation with the population and also economic growth. However, determination of a solid waste storage facility area is dependent on a number of specific criteria making it increasingly difficult to specify a suitable sanitary landfill location. Urban solid waste management and assessment of storage alternatives include complex and time-consuming processes for design engineers. Suitable site selection for solid waste storage requires a huge amount of spatial data processing, including a combination of regulation and acceptance criteria. Site selection criteria are generally based on limiting factors such as land use, geology, political and governmental boundaries, water resources, transportation, and expropriation. However, these criteria can be taken into consideration based on the engineer's judgment as well as local standards. The aim of this study is to assess the alternative method of repurposing an unproductive dam reservoir area as a sanitary landfill site due to it being a timely and cost-effective solution. Within this context, engineering approaches have been utilized under feasibility stage design in terms of ground permeability and natural structural materials, which are essential in minimizing economic and technical restrictions.
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    Integrated approach for determining spatio-temporal variations in the hydrodynamic factors as a contributing parameter in landslide susceptibility assessments
    (Springer Heidelberg, 2019) Canoglu, Mustafa Can; Aksoy, Husnu; Ercanoglu, Murat
    Although general approaches to the effect of water on the mechanisms causing landslides have been adopted, the work presented in this paper was carried out to quantify the landslide susceptibility variation in space and time, integrating the soil moisture distribution and routing (SMDR) model and landslide susceptibility concept. The approach proposed in the present study reflects the temporal effects of the saturation degree index (SDI) on landslide susceptibility as a new index to understand the effect of soil saturation. The topographic wetness index (TWI) is a conventional parameter that represents the relative wetness on landsliding. The new proposed landslide susceptibility approach is used in the study area to understand the effect of soil saturation and the emergence of the Dereba landslide in the study area. The comparative results of landslide susceptibility maps obtained from the new approach utilizing the proposed SDI and conventional TWI are remarkable. Accordingly, a new substantial method is proposed using the attainable monthly mean meteorological data to generate monthly landslide susceptibility maps. The results obtained for the Dereba landslide using the proposed method are validated with the other landslide that has occurred in the same watershed. The results revealed that the approach proposed in this study was compatible with the landslide mechanism in the study area and may help to express the water effect in landslide susceptibility analyses.
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    Land subsidence assessment under excessive groundwater pumping using ESA Sentinel-1 satellite data: a case study of Konya Basin, Turkey
    (Springer, 2021) Yesilmaden, Hande Mahide; Inan, Cagri Alperen; Kurtulus, Bedri; Canoglu, Mustafa Can; Avsar, Ozgur; Razack, Moumtaz
    Land subsidence analysis using satellite imagery is a consequential subject. Earth scientists have begun utilizing satellite imagery as an alternative to in-situ measurements and conceptual models. Synthetic aperture radar (SAR) images, moreover, utilize the reformer approach more than traditional satellite imagery with the use of high-resolution radar images. As a natural hazard, land subsidence is mostly attributed to excessive groundwater extraction, which is also the main reason for choosing the Konya Plain in Turkey as the study area for the present work. Since the Konya region is an agricultural and industrial land, groundwater extraction has been a challenging circumstance for the last few years. Change in groundwater level is also correlated with land subsidence rates through hydrogeological conceptualization. In this study, SAR images of the Sentinel 1 satellite are utilized for land subsidence rate calculation with the European Space Agency's SNAP software. Differential SAR interferometry (DInSAR) technique was used, which makes possible to detect deformation on the ground surface of the same portion of the Earth's surface using SAR images. The different acquisitions with DInSAR method allow to create differential interferograms that provide information ground motion with accuracy in cm. Three periods were utilized as 2016-2017, 2017-2018 and 2018-2019 the mean land subsidence rates were calculated for each period as 2.2, 1.4 and 1.7 cm/year, respectively. In the sum of the 3-year period, the maximum subsidence value went up to 16 cm.
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    Production and characterization of ionizing radiation shielding material from algal biomass
    (Pergamon-Elsevier Science Ltd, 2024) Polat, Ece; Gultekin, Batuhan; Canoglu, Mustafa Can; Altinbas, Mahmut; Ogul, Hasan
    This study employs several approaches to enhance environmental sustainability: First, algal biomass (with 52.5% protein content) was converted into value-added products. Second, residual algal biomass from protein extraction and pigment extraction and raw algal biomass were used to manufacture bioplastics. Third, radiation shielding performance of bioplastics has been investigated. As an alternative to plastics originated from petroleum-based raw materials, environmentally friendly bioplastics were derived from residual algae biomass after extraction. The gamma-ray radiation shielding properties of the produced bioplastic have been investigated using WinXCOM theoretical calculation and GEANT4 Monte Carlo (MC) simulation. Fast neutron shielding performance of the considered materials also evaluated with help of theoretical calculation and the same MC simulation. The produced bioplastics are similar to ones with commercially available PLA polymer. Sample 1 was found to be better gamma-ray attenuator while Sample 2 has the highest value of the effective neutron removal cross section. Additionally, the boron addition has resulted in lower water absorption capacity in the prepared samples. Using algae to produce more than one product as a raw material source will be an effective step toward sustainable life, and they could be an alternative gamma-ray shielding material to existing commercial polymers.
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    Selection of Suitable Dam Axis Location Considering Permeability and Grout Curtain Optimization
    (Geological Soc Amer, Inc, 2019) Canoglu, Mustafa Can
    This study investigated the effects of active tectonism on the construction of hydraulic structures. Apart from the effect of dynamic loads, active tectonism can cause permeability problems. The focus of this study was on overcoming the permeability problems considering the economic yield in terms of grout curtain design and optimum dam axis location. The ground permeability of dam locations is one of the decisive factors affecting the feasibility and economic yield of dam construction. Techniques (such as grouting) for ensuring ground permeability reduction are generally expensive and time-consuming; the experience at the first location of the Turgutlu Dam is a case in point. Construction of the first location of Turgutlu Dam was planned on a fault terrace that is part of the North Anatolian Fault Zone, which is the most important active tectonic feature in Turkey. A grout curtain was planned to provide permeability reduction and ground treatment for the terrace material. However, the base elevation of the adjacent valley is deeper, and thus potential leakage to this valley was expected. In spite of its big reservoir area, the Turgutlu Dam Project became infeasible in terms of economic yield due to the ground remediation (construction of grout curtain) costs for this location. To solve this problem, the dam was relocated downstream to avoid the fault terrace, choosing an optimum grout curtain to minimize cost and improve water retention of the reservoir, and increase economic yield of the dam.
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    SOIL-AQUIFER INTERACTIONS AND VADOSE ZONE MODELING: AN EXAMPLE FROM MARAIS POITEVIN (WESTERN FRANCE)
    (Carpathian Assoc Environment And Earth Sciences, 2019) Canoglu, Mustafa Can; Kurtulus, Bedri; Razack, Moumtaz
    Water flux in unsaturated zone is one of the most important phenomenon for determining the recharge characteristics of an aquifer. In-situ measurement and simulation models have been developed in recent years to characterize the recharge process in unsaturated zone. Recently, a mechanistic model named as AgriFlux have been adopted to specify the water fluxes in unsaturated zone. In this study, water flows in the unsaturated zone is investigated in order to understand a global interaction of soil-aquifer exchange system and to simulate the water flux leaching from unsaturated zone of soil and capacitance using AgriFlux model. Input parameters of the model were characterized by in-situ measurement and laboratory works. In-situ measurement were done by auger hole and Porchet test at 36 locations. Within laboratory tests, mineralogy of soil samples is characterized by X ray diffraction (XRD) and grain size distribution is determined on the undisturbed soil sampled from study area. The modelling results reveal that a percolated total water flow leaching through the unsaturated zone. The results were also compared with the observed ground water level fluctuations in the aquifer. Consequently, water flow quantification of a soil - aquifer system in Poitevin Marshland signpost the recharge characteristics of Bri Aquifer.
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    SPATIAL AND TEMPORAL ASSESSMENT OF METAL(LOID) CONTAMINATION IN ASARTEPE DAM LAKE (ANKARA, TURKEY) USING POLLUTION INDICES AND MULTIVARIATE STATISTICAL ANALYSIS
    (Parlar Scientific Publications (P S P), 2019) Kurtulus, Bedri; Sagir, Cagdas; Erdem, Gunseli; Tunc, Semih Okan; Canoglu, Mustafa Can; Tunca, Evren
    This study has investigated metal(loid) contamination in Asartepe Dam Lake, which is used for irrigation in Ankara, Turkey. Contamination Factor and Degree of Contamination were applied to evaluate contamination in the lake sediment. The contamination was shown to be moderate according to a modified Degree of Contamination analysis. Chromium was found to be the highest calculated metal on the Geoaccumulation Index, and the lake was found to be moderate-to-strongly contaminated according to the same method. The Pollution Load Index for the lake sediment varied between 3.11 and 3.5. Enrichment Factors suggest a minor anthropogenic origin for metal(loid) pollution; various statistical techniques were implemented. The greatest correlation among water-borne metal(loid)s was shown by analysis to be between iron and titanium. No strong correlation was observed for sediment samples. The results show that the lake water is relatively free of metal(loid)s. However, this is not the case for the lake sediment.
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    Su Yapilarinda Gövde Tipi Optimizasyonu ve Dogal Yapi Malzemelerinin Mühendislik Parametrelerinin Belirlenmesi: Kislademirli Göleti Örnegi Kütahya
    (Zonguldak Bülent Ecevit Üniversitesi, 2016) Canoglu, Mustafa Can; Kurtulus, Bedri
    Bu çalisma, Kütahya ili, Tavsanli Ilçesi, Kislademirli Göleti için gerekli dogal yapi malzemelerinin mühendislik özelliklerinin arastirilmasi, gölet gövde tipine karar verilmesini kapsamaktadir. Bu baglamda, büro, arazi ve laboratuvar çalismalari gerçeklestirilmistir. Sahanin genel jeolojisi, gövdede kullanilabilecek potansiyel geçirimli, geçirimsiz ve kaya malzeme alanlari 1/25.000’lik harita üzerinden büro çalismalari ile belirlenmistir. Arazi çalismalari kapsaminda ise malzeme alanlarinin kullanilabilirligi ve potansiyel malzeme miktarlari gözlemsel olarak ortaya koyulmustur. Daha sonra geçirimli ve geçirimsiz malzeme alanlarinda arastirma çukurlari açilmis ve ilgili malzeme alanindaki kullanilabilir derinlik yine gözlemsel olarak belirlenmistir. Bunun sonucunda, Kislademirli Göleti dogal yapi malzemesi ihtiyaçlarinin belirlenmesi amaci ile 2 adet geçirimsiz malzeme alaninda toplam 18 adet arastirma çukuru, 2 adet geçirimli malzeme alaninda toplam 11 adet arastirma çukuru olmak üzere toplamda 29 adet malzeme arastirma çukuru açilmistir. Sahada açilan arastirma çukurlarindan ve 1 adet kaya malzeme alanindan alinan temsil edici numuneler ise laboratuvar testlerine tabi tutulmus ve ilgili malzeme alaninin kullanilabilir olup olmadigi ortaya koyulmustur. Buna bagli olarak, kullanilabilir dogal yapi malzemelerinin, gölet aksina olan uzakligi, malzeme miktari ve niteligi göz önüne alinarak, gölet gövde tipine karar verilmistir