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AN ANALYSIS OF BATHYMETRIC CHANGES IN SILLE DAM RESERVOIR BETWEEN 1984 AND 2008

AUTHOR/S: A. CEYLAN, O. S. KIRTILOGLU, F. SARI, I. EKIZOGLU
Sunday 1 August 2010 by Libadmin2010

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 2, 387-394 pp

ABSTRACT

The aim of this study was to determine changes in surface area and volume of the Sille
dam reservoir, in Turkey, according to the water level. To adopt measures for collecting
more water in dam reservoirs, reservoirs and ponds, to prevent water pollution, protect
water sources and extend the service life of these facilities, it is important for users
(Municipalities, SHW and 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 Sille reservoir were identified by comparison
of topographic and bathymetric data used for the management of the facility. Two
ArcGIS digital elevation models, from 2008 and 1984, were used to determine changes
in storage capacity of the reservoir. The calculations indicated that, within this 24-year
period, the storage capacity of the reservoir decreased by 15.6% due to sedimentation.
Furthermore, compared to volume data from 1960, when the dam was constructed, the
water storage capacity was found to have decreased by 46.7%.

Keywords: Bathymetric surveying, Hydrographic surveying, Dam, Sediment, RTKGPS