Index Based Spatial Assessment of Heavy Metals in Damsa Dam Lake, Cappadocia/Türkiye

Abstract

Damsa Dam Lake is significant value to the Cappadocia/Nevşehir region in terms of recreation, fishing and agricultural irrigation. The study was conducted to assess potential harmful elements (PHEs) in the dam and to examine the distribution eco-toxicological effects by Geographical Information System (GIS). Samples were collected for one year at 12 stations on the dam lake according to standard methods. The results of analysis obtained field studies along the spring mix period in the dam showed that high harmful metal(loid)s content (especially, average of 7.38 µg / L As and 4.94 µg/L Cu). According to the average concentration level in surface water, the order of PHEs was determined as follows: Fe > Zn > As > Mn > Al> Cu > Se > Pb >Cr > Hg > Ni > Cd. The findings obtained from the sampling were evaluated according to the relevant water quality regulations. Index-based spatial distribution maps created with ArcGIS showed that heavy metal-polluted lake water layer may have a significant effect on the ecological balance at some stations in the lake. This situation reveals the necessity of ongoing rehabilitation measures in the lake and the importance of sustainable conservation priority management practices.

Keywords

• Heavy Metals
• Surface Water Quality
• Spatial Analysis
• Damsa Dam
• Ürgüp

Damsa Baraj Gölü'nde (Kapadokya/Türkiye) Ağır Metallerin İndeks Tabanlı Mekânsal Değerlendirmesi

Abstract

Damsa Baraj Gölü, Kapadokya/Nevşehir bölgesi için rekreasyon, balıkçılık ve tarımsal sulama açısından önemli bir değere sahiptir. Çalışma, barajdaki potansiyel zararlı elementleri (PZE) değerlendirmek ve ekotoksikolojik etkilerinin dağılımını Coğrafi Bilgi Sistemi (CBS) ile incelemek amacıyla yürütülmüştür. Baraj gölü üzerinde bulunan 12 istasyondan bir yıl boyunca standart yöntemlere göre örnekler toplanmıştır. Barajda ilkbahar karışım döneminde yapılan arazi çalışmalarında elde edilen analiz sonuçlarına göre yüksek zararlı metal(loid) içeriği (özellikle ortalama 7,38 µg/L As ve 4,94 µg/L Cu) olduğu belirlenmiştir. Yüzey sularındaki ortalama konsantrasyon seviyelerine göre PZE'lerin sıralaması şu şekilde belirlenmiştir: Fe > Zn > As > Mn > Al> Cu > Se > Pb > Cr > Hg > Ni > Cd. Örneklemeden elde edilen bulgular ilgili su kalite yönetmeliklerine göre değerlendirilmiştir. ArcGIS ile oluşturulan indeks tabanlı mekansal dağılım haritaları, göldeki bazı istasyonlarda ağır metal yönünden kirlenmiş göl suyu tabakasının ekolojik denge üzerinde önemli bir etkiye sahip olabileceğini göstermiştir. Bu durum, gölde devam eden rehabilitasyon önlemlerinin gerekliliğini ve sürdürülebilir koruma öncelikli yönetim uygulamalarının önemini ortaya koymaktadır.

Keywords

• Ağır Metaller
• Yüzey Suyu Kalitesi
• Mekansal Analiz
• Damsa Barajı
• Ürgüp

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