Fertility of The Waters of The Baturusa River, Bangka District

Abstract

The river estuary is a place where sea water meets fresh water from the mainland and has a high level of water fertility. Estuary waters are one of the waters that receive the burden of the entry of organic matter. Water fertility is the ability of waters to produce optimum nutrients for the life of aquatic organisms. Water fertility is usually associated with the concentration of nutrients in water bodies. This study aims to determine the physical, chemical and biological qualities of the waters, namely current, DO (Dissolved oxygen), brightness, depth, chlorophyll-a, pH, temperature, salinity and total phosphate in the estuary of the Baturusa River and to analyze the fertility level of the waters at the mouth of the Baturusa River. based on Carlson's Trophic State Index. This research was conducted in July to October 2021. This research method uses the observation method, in determining the location using the purposive sampling method and analyzed using the Trophic State Index (TSI) method at 5 data collection stations. The results of the Carlson Tropic State Index (TSI) average measurement at the Baturusa River estuary obtained the value of Station 1 which is 53.86, Station 2 is 52.94, Station 3 is 51.33, Station 4 is 52.15 and Station 5 is 51.84.