Akademik Veri Yönetim Sistemi
2nd International Conference on Multidisciplinary Sciences and Technological Developments, Bayburt, Türkiye, 12 - 15 Aralık 2025, ss.200-206, (Tam Metin Bildiri)
The aim of this study is to evaluate seasonal and annual water quality in the Harsit Stream Watershed by using the weighted arithmetic water quality index (WA-WQI) and the Canadian Council of Ministers of the Environment water quality index (CCME-WQI). The WQI scores were calculated considering 15 water quality parameters (dissolved oxygen, water temperature, pH, electrical conductivity, suspended sediment, ammonium nitrogen, nitrate nitrogen, total Kjeldahl nitrogen, total nitrogen, ortho-phosphate phosphorus, chemical oxygen demand, aluminum ion, manganese ion, total iron, and total chromium) over a one-year period for two monitoring stations, selected upstream and downstream of the Torul Dam Reservoir, Gumushane, North East Türkiye. Limit values in index calculations were primarily based on the Turkish Surface Water Quality Regulation, complemented by other guidelines where necessary. According to the WA-WQI classification, the upstream water quality changes from very poor to unsuitable for use, whereas poor to very poor for downstream. Moreover, the upstream water quality is marginal, and downstream water quality ranges from marginal to good for the CCME-WQI. The results reveal that the downstream station generally has better water quality than the upstream station. It was concluded that reservoirs have a significant role based on self-purification capacity for improving stream water quality.