Water Quality and Eutrophication in Jatiluhur Reservoir, West Java, Indonesia

The eutrophication in Jatiluhur Reservoir had continued due to organic pollution. The high eutrophication negatively impacted reservoir sustainability and some activities there, such as fisheries. This study aimed to determine the level of eutrophication and provide some alternative recommendations for its control. The research was conducted by sampling method in 2017 on nine representing stations. A stratified sampling method took samples of water and phytoplankton. The results showed that based on the TSI index value (>4), Trix index (>50), the eutrophication status of the Jatiluhur reservoir was in eutrophic-hypertrophic level. Some alternative control which could recommend were: (1) utilizing macrophyte as a nutrient absorbing agent, (2) stocking of planktivorous fish, and (3) implementing an environmental friendly of fish culture in floating cage system.