Variation of Total Suspended Solids versus Nephelometric Turbidity in the Stream Değirmendere, Southeastern Black Sea


9th World Congress of EWRA, Water Resources Management in a Changing World: Challenges and Opportunities, İstanbul, Turkey, 10 - 13 June 2015, pp.103-104

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.103-104
  • Karadeniz Technical University Affiliated: No


Suspended solids related studies based on direct measurements for Turkish rivers and streams are very few due to various reasons such as cost, time or fewer operational sediment gauging stations, and thus the researchers tend to look for indirect methods despite the fact that direct measurement of suspended solids is one of the most reliable methods. The Stream Değirmendere Watershed having a length of main branch of 55 km, a recharge area of 1,061 km2, and a mean annual surface water potential over 550 hm3 is of prime importance since domestic water demand of Trabzon people has been supplied by this watershed and it has economically exploitable but largely undeveloped hydropower potential. On the other hand, the watershed where a lot of run–of–river hydropower plants have been constructed and operated has been under pressure arising from the all kinds of anthropogenic activities such as construction regarding bridge, levee, and relocation of road and operation regarding drinking water treatment plants, concrete plants, crushing, screening and washing plants.

This paper aims to monitor the nephelometric turbidity (T) and determine the total suspended solids (TSS) in six stations selected on the main branch of Stream Değirmendere draining into the South eastern Black Sea at the junction 41º 00′ 10.9″ N–39º 45′ 26.1″ E , and evaluate the semi monthly variation of TSS versus T from January to September 2014. The effects of the all kinds of anthropogenic activities on TSS and T are also investigated. Finally, it is focused on the suspended sediment transport to the South eastern Black Sea and possible effects of this transport on Trabzon Harbour located at a distance of approximately 750 m far from the junction.