摘要：Sengguruh Reservoir located in Malang Regency has important function as sediment barriers for Sutami Reservoir. The water contains many organic matters that will cause eutrophication. The effect of eutrophication can reduce the biodiversity in the reservoir. The purpose of this study is to identify the trophic status of Sengguruh Reservoir using TSI method and to estimate the nutrient limit (nitrate and phosphate) to predict the eutrophication using quantile regression approach. The results show that Sengguruh Reservoir is in heavy eutrophic state. On the other hand, the nutrient limit estimation to predict heavy eutrophication is at 0.853 mg/L for nitrate and 0.862 mg/L for phosphate.
