SALSABILA, Cindy Aurellia (2023) Applying Macroinvertebrates in Biotic Indices for Water Quality Assessment of Banjaran River. Skripsi thesis, Jenderal Soedirman University.

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Abstract

The Banjaran River is a tributary of the Logawa River, flows from North to South, and approaches the Serayu River with a water catchment area of 47.16 km2. Residents around the river widely use the Banjaran River for activities in agriculture and daily activities such as bathing, washing, and domestic waste disposal. This causes the Banjaran River to be polluted. With the existence of micro hydro activities, it is necessary to monitor and manage the environmental conditions of river waters. The research method uses a survey method and purposive random sampling at five station points based on the surrounding area and human activities. The composition of macroinvertebrates is described in descriptive form based on the percentage of each family in the community. The biotic indices such as LQI, FBI, EPT, and SIGNAL 2 were analyzed by comparing the interpretations of the five stations. Water quality is evaluated based on physical-chemical parameters and compared to PP No.22/2021. The most applicable biotic index is determined based on sensitivity to organic matter addition and constant with chemical parameters. Macroinvertebrates obtained in the Banjaran River consisted of 35 families with the common species Perlodidae, Hydropsychidae, and Oligochaeta families. The biotic indices applied in Banjaran River can detect organic matters based on family scores. The water quality of Banjaran River is still quite good in accordance with the PP No. 22/2021 quality standard but received the organic matters at Stations IV and V. The LQI index was the most applicable and can indicate the organic matters of Banjaran River.

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