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    Evaluation of groundwater over-abstraction by industrial activities in the Trakya region, Turkey -: A case of urban groundwater resource over-abstraction
    (Springer, 2006) Ongen, Atakan; Tinmaz, Esra
    This study examines the effects of rapidly increasing industrial activities on groundwater levels in the Trakya Region of Turkey where groundwater is the main resource for industrial, agricultural, and domestic water supply. The Ergene River Basin (11,325 km 2) is the most important catchment, around half of which is underlain by the unconfined 600 m thick Corlu/Ergene aquifer of Miocene/Pliocene age. Using water-table monitoring data from 13 monitoring wells the relation between potential pumping and water table fluctuation was evaluated. The average aquifer reserve and the total discharge of the area per year were determined as 340 and 460 Mm(3) respectively. The annual recharge was calculated as 123 Mm(3). The results show that the total amount of discharge (outflow + withdrawal) is much higher than the groundwater recharge, i.e. the system is not sustainable.
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    Risks posed by unsanitary landfill leachate to groundwater quality - Corlu (Trakya), Turkey
    (Springer, 2006) Tinmaz, Esra; Ongen, Atakan
    Poorly regulated landfill disposal is a worldwide problem. This study aimed to assess the risks posed by unsanitary landfill leachates to groundwater quality. The case study presented examines the town of Corlu in the Tekirdag Province of Turkey, where various types of waste are disposed into unsanitary landfill sites without any separation or classification of hazardous and non-hazardous waste. The leachate from unsanitary landfill in Corlu has complex characteristics that are dependent on the composition of solid waste in the landfill. Contamination risks posed to groundwater vary and depend upon the quantity of leachate generated (in this case similar to 13 m(3)/day) and its specific physico-chemical characteristics. Considerable public attention has recently been focused on the environmental and potential human health risks of unsanitary landfill in Corlu. The potential risk of leachate contamination of groundwater resources in Corlu Town is assessed from waste quality, soil characteristics and leachate composition data. General recommendations to facilitate improved future protection of groundwater quality are indicated.