Sediment Quality Assessment in Porsuk Stream Basin (Turkey) from a Multi-Statistical Perspective

Abstract

Heavy metals, which can be strongly accumulated and biomagnified along water, sediment, and aquatic food chain, are the most important inorganic contamination factors and have significant hazardous effects on the ecological balance of the environment. It is clearly revealed and clearly known that sediment may act as a sink of various contaminants and pose a significant risk to water quality [1][2][3][4][5].Porsuk Stream is one of the most important and the longest branches of the Sakarya River. Porsuk, with a length of 448 km, has a reservoir on the watershed Pol. J. Environ. Stud. Vol. 27, No. 2 (2018), 747-752 Original Research Sediment Quality Assessment in Porsuk StreamBasin ( AbstractPorsuk Stream Basin is a significant aquatic habitat located in the middle of the Aegean and Central Anatolian Regions of Turkey. Similar to may aquatic habitats, it is exposed to intensive agricultural, domestic, and industrial pollution. The aim of this study was to determine the toxic element levels in Porsuk Stream Basin sediment and evaluate the detected data using a multi-statistical technique. For this purpose, sediment samples were collected from 18 stations selected on the basin (three of them located on Porsuk Dam Lake) in summer 2015, and zinc, copper, lead, cadmium, nickel, and chromium accumulations in sediment samples were determined. All the detected data were compared with the consensus-based threshold effect concentrations (TEC), and factor analysis (FA) also was applied to detected data in order to evaluate the contamination grades in the basin. According to detected data, although Cu, Pb, and Cd concentrations were detected below the limit values, Zn, Cr, and Ni concentrations exceeded the limit values in general. According to results of FA, 3 factors -industrial, agricultural, and lead -explained 81.56% of the total variance.

Maksimum Entropi Modellemesi (MaxEnt) kullanarak endemik bir tatlı su balık türünün olan Seminemacheilus lendlii (Hankó, 1925)’in güncel ve gelecek potansiyel habitat uygunluğunun tahmini: koruma için çıkarımlar

“…It was recorded from only one point of Sakarya basin (Çiçek 2020), Lake Eber (Mangıt et al 2017), and Akşehir lake (Freyhof et al 2011). Eber and Akşehir lakes have reached the point of losing a significant part of their water (Sener et al 2010) , and Sakarya basin is under pollution pressure (Köse et al 2018). Further, increasing industrial and agricultural pollution will significantly affect fish habitats.…”

“…Eber Lake and Akşehir Lake surface volume is gradually decreasing (Şener et al 2010). Also, Porsuk stream and its tributaries, which are accepted as the type locality of the species (Yoğurtçuoğlu et al 2020), are under the pressure of agriculture, settlement areas, and increasing industry (Köse et al 2018). As a result of climate change, a decrease in precipitation, and an increase in temperatures (Öztürk 2002) may cause the loss of the habitats of the species.…”

Assessment of the potentially toxic element contamination in water of Şehriban Stream (Black Sea Region, Turkey) by using statistical and ecological indicators

“…Statistical methods are very useful and important tools in assessing the multiple effects of pollutants on water ecosystems. Pearson’s Correlation Index (PCI), which is a useful instrument used in determining the relationships, and Factor Analysis (FA), which helps with explaining the variance of a large data set with a smaller data set of independent variables, are known as very important statistical indicators (Çiçek et al, 2019; Köse et al, 2018; Tokatlı, 2017; Ustaoğlu, Tepe, Aydin, et al, 2020; Varol et al, 2012).…”

Assessment of Spatial – Temporal Variations in Freshwater Pollution by Means of Water Quality Index: A Case Study of Hasanağa Stream Basin (Edirne, Turkey)

“…Cluster Analysis (CA) is known as one of the most convenient multivariate statistical methods. It assembles the objects based on the similar characteristics they possess (Akın et al, 2011;Varol et al, 2012;Belkhiri and Narany, 2015;Köse et al, 2018;Atıcı et al, 2018;Çiçek et al, 2019;Tokatlı, 2020b).…”