Tingkat dan laju penurunan kualitas air di DAS Brantas Malang Raya

  • Ima Yudha Perwira Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana, Kampus UNUD Bukit Jimbaran 80361, Bali, Indonesia

Abstract

The decrease level of water quality of Brantas Watershed in Malang Raya was observed in this study. The aim of this study was to observe the decrease level of water quality of Brantas Watershed from Batu to Malang City. This study was carried out in the Brantas Watershed of Malang Raya (8 stations: A, B, C, D, E, F, G, and H) for 18,4 Km. The water quality parameters observed in this study were: CODmn (permanganometry), CODcr (CODmn correlation based analysis), dissolved oxygen (DO) (Winkler iodometry), TDS and electrical conductivity (EC) (EC meter), pH (pH meter), and turbidity (Turbidity meter). The result showed the value of CODmn: 1,8-10,2 mg/L, CODcr: 5,6-31,5 mg/L, DO: 4,0-6,1 mg/L, TDS: 204-289 mg/L, EC: 430-617 µS/cm, pH: 7,1-7,6, and turbidity: 2,02-10,30 NTU. There are 3 stations (A, B, and C) with 1st class water quality, 1 station (D) with the 2nd class water quality, and 4 stations (E, F, G, and H) with 3rd class water quality. The decrease of water quality in the Brantas Watershed from Batu to Malang City was up to 3 times with a decrease rate of 2,3 mg/L-1Km-1. The decomposition of organic materials in the water of Batu City and western part of Malang City is relatively better than that of central parts of Malang City which might be caused by the over capacity of recovery (Self-purification mechanism).

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Published
2019-01-13
How to Cite
PERWIRA, Ima Yudha. Tingkat dan laju penurunan kualitas air di DAS Brantas Malang Raya. Journal of Marine and Aquatic Sciences, [S.l.], v. 5, n. 2, p. 185-191, jan. 2019. ISSN 2549-7103. Available at: <https://ojs.unud.ac.id/index.php/jmas/article/view/45581>. Date accessed: 02 nov. 2024. doi: https://doi.org/10.24843/jmas.2019.v05.i02.p04.
Section
Articles