Yazar "Arkoc, Orhan" seçeneğine göre listele

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    Analyzing the Water Budgets of Reservoirs by Using Autonomous Mini Boats
    (Trans Tech Publications Ltd, 2014) Tuna, Gurkan; Arkoc, Orhan; Potirakis, Stelios M.; Nefzi, Bilel
    The calculation and estimation of water deposits in both man-made reservoirs and natural reservoirs is very important in several aspects. For surface water reservoirs in hot and dry environments, evaporation is an important factor in their operations since it can cause significant water loss. Typically, hydrologists use different computer models which take into account the effects of evaporation to estimate the water budgets of reservoirs. An important step required for this repetitive process is to calculate the current water budget of a reservoir. In this paper, an autonomous system is proposed aiming to support this step. Unlike the common approaches, the proposed system is fast and accurate, and requires no human effort. In this system, first, an autonomous mini boat follows predefined trajectories at a reservoir and builds a depth map (bathymetric map) of it. Then, an onboard computer calculates the water budget of the reservoir. The proposed system is portable and a single system can periodically serve at several water reservoirs. Field tests in the water reservoir of Kirklareli (Kirklareli dam), Turkey, are in progress.
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    ANN-Based Estimation of Groundwater Quality Using a Wireless Water Quality Network
    (Hindawi Ltd, 2014) Kilicaslan, Yilmaz; Tuna, Gurkan; Gezer, Gulsum; Gulez, Kayhan; Arkoc, Orhan; Potirakis, Stelios M.
    Water is essential for life. Considering its importance for humans, it must be periodically analyzed to ensure its quality. In this study, a wireless water quality network is deployed to collect water quality parameters periodically and an artificial neural network-based estimation method is proposed to estimate groundwater quality. Estimating groundwater quality enables the authorities to take immediate actions for ensuring water quality. Compared to traditional water quality analysis methods, the proposed method has the advantage of letting the authorities know the quality of their water resources beforehand. A set of simulation studies given in this paper proves the efficiency and accuracy of the proposed method.
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    ASSESSMENT OF GROUNDWATER QUALITY OF EAST THRACE, TURKEY FOR IRRIGATION PURPOSES WITH THE AID OF GEOGRAPHICAL INFORMATION SYSTEMS
    (Stef92 Technology Ltd, 2016) Arkoc, Orhan; Savran, Dogan
    Quality of irrigation waters has always been a major concern for crop yield. The study area (Thrace) is one of the main wheat and sunflower production lands of Turkey. In this study quality of groundwaters used for irrigation purposes in east Thrace was assessed. For this objective, groundwater samples (n=18) were collected from deep irrigation wells and later were analyzed for chemical properties.The samples were analyzed for pH, total dissolved solids (TDS), and concentrations of HCO3-, NO3-, Na+, K+, Ca2+, Mg2+ and Cl and spatial distribution maps of these ions and cations were prepared by Geographic Information System (GIS). Subsequently sodium ratio (Na%), sodium absorption ratio (SAR), residual sodium carbonate (RSC) and magnesium hazard (MH) indices of these waters were calculated and spatial distribution maps were prepared by GIS. Distribution maps of these indices showed that majority of the groundwaters in the study area were suitable for irrigation.
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    Continuous Monitoring of Water Quality Using Portable and Low-Cost Approaches
    (Sage Publications Inc, 2013) Tuna, Gurkan; Arkoc, Orhan; Gulez, Kayhan
    Water quality refers to the physical, chemical, and biological characteristics of water, and it is a measure of the condition of water relative to any human need or purpose. A particular problem with measuring the condition of water quality at drinking water reservoirs is the requirement of collecting a large number of samples. To handle this problem, we focus on the practical use of two different portable and low-cost approaches for continuous monitoring of water quality: miniboats loaded with sondes with probes and wireless sensor network-(WSN-) based monitoring system. These approaches bring several advantages over traditional monitoring systems in terms of cost, portability, and applicability. Our simulation studies show that these systems can be used to monitor water quality at drinking water reservoirs such as dams and holding ponds. Field tests to prove the effectiveness of the proposed systems are in progress.
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    Wireless Sensor Network-based Water Quality Monitoring System
    (Trans Tech Publications Ltd, 2014) Tuna, Gurkan; Nefzi, Bilel; Arkoc, Orhan; Potirakis, Stelios M.
    Water is vital for both nature and human beings. The construction of dams and embankments, the irrigation practices, and the anthropogenic activities influence water quality. In order to control water quality, it is essential to understand the sources of pollutants. Water quality monitoring requires the collection of large numbers of samples and long delays until the results are available. Therefore, rapid monitoring of water quality is very important. In this respect, numerous systems exist for this kind of automatic monitoring. In this study, we propose a wireless sensor network (WSN)-based monitoring system controlled by a web-based online interface which allows the remote monitoring via Internet. This brings advantages over traditional monitoring systems in terms of cost effectiveness, portability and applicability. Field tests in the water reservoir of Kirklareli (Kirklareli dam), Turkey, are in progress.