Author(s): Serhat Kucukali
Linked Author(s): Serhat Kucukali
Keywords: Mountain stream; Pool; Water temperature; Dissolved oxygen; Riparian vegetation; Thermal refuge
Abstract: This study examines the vertical profiles and seasonal variations of water temperature and dissolved oxygen in a mountain stream pool. The study was carried out in Harmankaya Stream, which flows through a mountainous area located in the vicinity of Zonguldak, northwest Black Sea coast of Turkey. The stream has a drainage area of approximately 12 km². Measurements of temperature and dissolved oxygen concentration were made in a natural pool located on the course of this stream. The dissolved oxygen concentration is found to decrease with depth in the majority of the observations, whereas a decreasing temperature profile is only observed under the condition of net heating at the pool surface. The measurements revealed a seasonal dependence of the dissolved oxygen concentration, coherent with the seasonal variations of the water temperature. The presence of riparian vegetation significantly influences both of the measured parameters, particularly during the summer months. The findings of this study may have important implications for river restoration projects on habitat improvements and providing hydraulic and thermal refuges for fish.
Year: 2026