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    AN ANALYSIS OF BATHYMETRIC CHANGES IN ALTINAPA RESERVOIR
    (NORTH UNIV BAIA MARE, 2011) Ceylan, Ayhan; Karabork, Hakan; Ekizoglu, Ilke
    The aim of this study was to determine changes in surface area and volume of the Altinapa Reservoir, in Turkey, according to the water levels. To adopt measures for collecting more water in dam reservoirs, lakes and ponds, to prevent water pollution, protect water sources and extend the service life of these facilities, it is important for users (Municipalities, SHW, Irrigation Unions etc.) to know the current topographic conditions and any changes in the storage capacities of these facilities. Sedimentation is one of the most serious factors that threaten aquatic environments such as dams, lakes and ponds. Sedimentation causes some lakes, ponds and dams to be filled and polluted in a short time. It also causes loss of capacity and reduces the lifespan of the facilities. Changes in surface area and volume of the Altinapa Reservoir were identified by comparison of topographic and bathymetric data used for the management of the facility. Two ArcGIS digital elevation models, from 2009 and 1981, were used to determine changes in storage capacity of the reservoir. The calculations indicated that, within this 28-year period, the storage capacity of the reservoir decreased by 12.4% due to sedimentation. Furthermore, compared to volume data from 1967, when the dam was constructed, the water storage capacity was found to have decreased by 33.4%.
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    ASSESMENT OF BATHYMETRIC MAPS VIA GIS FOR WATER IN RESERVOIR
    (UNIV FEDERAL PARANA, CENTRO POLITECNICO, 2014) Ceylan, Ayhan; Ekizoglu, Ilke
    In order to adopt measures for storing more water in reservoirs, lakes and ponds; to prevent water pollution, protect water sources and extend the service life of these facilities, it is important for manager (Municipalities, Directorates of the State Hydraulic Works (DSHW), Irrigation Unions etc.) to know the current topographic conditions and any changes in the storage capacities of these facilities. This study aimed to identify the updated topographic and bathymetric data required for the efficient management and usage of Altinapa reservoir, changes in surface area and volume of the facility, and to form a Reservoir Information System (RIS). Two digital elevation models, from 2009 and 1984, were used to determine changes in the storage capacity of the reservoir. The calculations indicated that, within this 25-year period, the storage capacity of the reservoir decreased by 12.7% due to sedimentation. A Dam Information System (RIS) was developed from a wide range of data sources, including topographic and bathymetric data of the reservoir and its surrounding area, data on specific features such as plant cover, water quality characteristics (Temperature, Dissolved Oxygen (DO), Secchi Disk Depth (SDD) and pH), geological structure, average water level, water supplied from springs, evaporation value of the reservoir, and precipitation.