The Eastern Black Sea Basin is the highest rainfall area in Turkey with an average rainfall of 1300 mm. However, this region is one of the poorest regions in terms of spring and groundwater potential due to its topography having extremely high slopes, and impermeable-less permeable rocks exposed in the basin. Alluvium, which is carried by streams flowing from north to south along the Eastern Black Sea coastline, are important in terms of groundwater. Alluvium, of which thickness and width decrease from north to south, has a length of 1-16 km and a width of 50-1500 m. Water is provided from wells that are drilled in alluvium with a thickness of up to 40 m. According to DSI (2015) data, the static water level is between 0.3 and 1 m, while the dynamic water level is between 5 and 15 m. The volume of water stored in the coastal aquifers of the Eastern Black Sea Basin is 238 hm3. Some of these aquifers are still used and some were used in the past as drinking water sources. However, in recent years, construction such as industrial sites, quarries, coal storage and packaging facilities, warehouses and buildings of some public institutions and organizations has been increasing on these aquifers, which form partially flat areas between narrow valleys. This construction adversely affects both the quantity and quality of shallow groundwater stored in alluvium. The aquifers are the most important groundwater sources in the basin and are used to supply drinking and potable water for 4 cities. Değirmendere and Taşlıdere aquifers, which provided drinking-potable water in the past, were completely under stress by urbanization and the use of groundwater was terminated. The urban activities on Melet, Civil, Pazarsuyu (Ordu) and Batlama and Keşap (Giresun) aquifers, which are located in the settlement area, continue to increase. The aquifers of Curi, Yağlıdere, Gelevera, Akhisar, Yanbolu, Baltacı, İyidere and Fırtına are less affected by urban activities. Among them, Curi, Yağlıdere, İyidere and Fırtına aquifers are aquifers with high groundwater capacities. In order to be able to use the Eastern Black Sea coastal aquifers for many years, it is necessary to protect them in terms of quality and recharging.
Yazarlar makaledeki verilerin sağlanması konusundaki yardımlarından dolayı DSİ 22. Bölge Müdürlüğü elemanlarından Jeoloji Mühendisi Songül CEVAHİR’e ve Jeoloji Mühendisi Güven Köksal KUTLU’ya teşekkür eder.
Birincil Dil | Türkçe |
---|---|
Konular | Yer Bilimleri ve Jeoloji Mühendisliği (Diğer) |
Bölüm | Makaleler - Articles |
Yazarlar | |
Yayımlanma Tarihi | 31 Ocak 2020 |
Gönderilme Tarihi | 29 Mayıs 2019 |
Kabul Tarihi | 15 Ekim 2019 |
Yayımlandığı Sayı | Yıl 2020 Cilt: 63 Sayı: 1 |
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