Abstract The objective of this study was to determine the vertical distribution of metals and organic carbon in lakes Küçükçekmece and Terkos, which are located in different areas near Istanbul and are affected by different environmental factors. The aim was also to specify the metal input, its sources, and the ecological risk over the last 700 years. For analysis, core sediment samples were taken from the bottom of each lake, sliced into 2-cm sections, and analyzed for multiple elements, organic carbon, carbonate, and chlorophyll degradation products. It was determined that Lake Küçükçekmece is threatened by domestic and industrial pollution. To solve this problem, a treatment plant was commissioned in 2012 for the treatment of urban and industrial wastes. In addition, natural gas has been the preferred fuel for the last two decades in Istanbul and this has changed the pollutant profile. On the other hand, Lake Terkos faces possible risks of Mn, P, and As inputs because of fertilizer use in nearby agricultural fields.

中文翻译：

---

基于人为影响和生态风险评估的 Küçükçekmece 湖和 Terkos 湖（土耳其伊斯坦布尔）金属的历史记录

摘要 本研究的目的是确定位于伊斯坦布尔附近不同地区并受不同环境因素影响的 Küçükçekmece 和 Terkos 湖中金属和有机碳的垂直分布。目的还在于确定过去 700 年的金属输入、来源和生态风险。为了进行分析，从每个湖底采集岩心沉积物样品，切成 2 厘米的部分，并分析多种元素、有机碳、碳酸盐和叶绿素降解产物。据确定，Küçükçekmece 湖受到家庭和工业污染的威胁。为解决这个问题，2012 年启用了一座处理厂，用于处理城市和工业废物。此外，在过去的 20 年里，天然气一直是伊斯坦布尔的首选燃料，这改变了污染物的分布。另一方面，由于附近农田使用化肥，Terkos 湖可能面临锰、磷和砷投入的风险。