Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Conference Object Assessment of Sediment Capture Performances of Coanda and Tyrolean Intakes by Experiments(International Association for Hydro-Environment Engineering and Research, 2019) Elçi, Şebnem; Hazar,O.; 01. Izmir Institute of Technology; 03.03. Department of Civil Engineering; 03. Faculty of EngineeringIntake structures on channels or in reservoirs are frequently used to divert/withdraw a certain amount of water discharge for various purposes of use such as irrigation, potable water supply and generation of hydroelectric power. Hydrologic, geotechnical, topographic and climatic factors directly affect the type of the intake structures which will be constructed. Factors such as excessive rain or snow melt and greater river bed slope which can be cause of high flow rate make impossible to use of the frontal and lateral intake structures. When water has to be diverted from a turbid source having great amount of suspended materials in it, bottom intakes structure such as Coanda and Tyrolean types are preferred. To perform this task, diverted water is captured by a transversal rack and a gallery located in the control crest is utilized. With a proper design of the intake, the quality of the diverted water can be increased by screening out most of the sediments in the flow. Previous studies on the bottom intake structures, presented empirical equations based on experiments relating the diverted water amount per unit width to hydraulic head, discharge coefficient and void ratio of the bar clearance to the total length. Most studies focused on the discharge coefficient and the parameters affecting this coefficient such as hydraulic and rack characteristics. Presented study focused on the sediment capture performances of these two specific type intake structures though experimental work. A novel sediment feeding system designed specifically for this study is utilized in the experiments. Study results pointed out a new parameter including sediment characteristics, as well as rack and hydraulic characteristics should be considered for a proper design of Tyrolean and Coanda type intakes. © 2019, IAHR.Conference Object Citation - Scopus: 1Water Quality Evaluation Using Various Water Quality Indices: a Case Study for B. Menderes River, Turkey(International Association for Hydro-Environment Engineering and Research, 2022) Bor, A.; Elgi, Ș.; 01. Izmir Institute of TechnologyWater quality is an important factor for public health and aquatic life, and it has become an increasingly important problem due to the growth ofthe population, urban expansion, and development. Forthis reason, the evaluation of surface water quality is an important issue for countries. Water quality indexing is widely used to present complex water quality data in a more comprehensible form and provides decision-makers and non-technical managers ofwater resources with concise information about water quality status. In this study, the water quality is determined based on the water quality monitoring data obtained from the Kocarli Bridge gauging station in the B. Menderes Riverforthe 9 years period between 2006 and 2014. The main pollutants in this region, with parameters exceeding border limit values PH were found to be Sulphate (S04), Nitrate (N03), Ammonia (NH4), Nitrite (N02), Phosphate (P04), Electrical Conductivity (EC), Total Dissolved Solids (TDS) Calcium (CA), Magnesium (MG), Sodium (Na), Potassium (K) and Bacteriological Parameters (E-coli, F-Strp, and Total Coli). In addition, five different WQI performances are compared so that the data can be easily interpreted. The methods used were the weighted arithmetic index (WAI-WQI) Environmental Water Quality Index (CCME-WQI) Canadian Council of Canada (CCME-WQI), Universal Water Quality Index (UWQI), Oregon Water Quality Index (0WQI), and Aquatic Toxicity Index (ATI). The applicability of different methodologies is discussed, and significant inconsistencies were observed between the classification results. © 2022 IAHR.