ENGINEERING GEOLOGICAL ASPECTS OF REPLACING A SOLID-WASTE DISPOSAL SITE WITH A SANITARY-LANDFILL

The current solid waste disposal site in the Mamak district of Ankara is being engulfed by the growing city. All varieties of solid wastes, including medical wastes, are stored at the present site in an irregul ar manner. Topographical and geological conditions at Mamak waste site are favorable for constructing a sanitary landfill. Located at the ed ge of a topographical depression, the site is underlain by the natural hydraulic barriers such as clay and metagreywacke. The terrestrial cl ay has a permeability of 10(-7) to 10(-8) cm/s and low to moderate val ues of CEC. The proposed sanitary landfill to replace the present soli d waste site has a capacity of storing solid waste over 50 years. The details of base liner, final cover, toe embankment, and drainage of le achate and gas are presented in the paper.