Abstract
Condition of river is strongly influenced by the characteristics and the surrounding environment. Unus River is one of the rivers in Mataram City that flows throughout the year. The flow of the Unus River is used by residents for irrigation purposes, household waste disposal, market waste, industrial waste and so on. The purpose of this study was to determine annelida diversity index and to determine chemical and physical conditions of waters. The study was conducted by dividing into 10 stations by stratified random sampling. Physical and chemical parameters measured were pH, temperature, DO, BOD, C Organic, depth and turbidity. Data analysis is descriptively. The results showed that 6 species found in the estuary of Unus such as Tubifex sp, Branchiura sp, Nereis sp, Lumbriculus sp, Capitella sp and Halobdella sp. Ecosystem conditions are not balanced and there is a tendency to high ecological pressure. Physical and chemistry waters quality are still below the quality standard but there is a tendency DO deficit at each station.
Highlights
Sungai adalah wadah air alami dan/atau buatan, mulai dari hulu sampai muara yang dibatasi oleh garis sempadan (Pemerintah Republik Indonesia, 2011)
Unus River is one of the rivers in Mataram City that flows throughout the year
The flow of the Unus River is used by residents for irrigation purposes, household waste disposal, market waste, industrial waste and so on
Summary
Pengambilan sampel dilakukan pada masing-masing stasiun dimana stasiun penelitian dibagi menjadi 10 stasiun. Pengambilan sampel cacing dan kualitas air mengacu pada APHA (1999). Untuk mengukur kualitas air parameter fisik kimia yang diamati adalah suhu, kedalaman, kekeruhan, pH, DO, BOD, tekstur dan kandungan C-Organik substrat. Sampel cacing yang sudah disaring diawetkan dengan formalin 4%. Pengukuran suhu, pH dan kedalaman dilakukan secara in-situ, sedangkan pengukuran DO, BOD, kekeruhan tekstur dan kandungan C-Organik substrat dilakukan di laboratorium
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