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Hikmal Akbar Habibie
Universitas Pembangunan Nasional "Veteran" Jawa Timur
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Pemodelan Deterministik Streeter-Phelps Untuk Evaluasi Kapasitas Self-Purification Dan Dinamika Oksigen Terlarut Pada Sungai Jagir Kota Surabaya Ariesta Sulistyo Asih; Hikmal Akbar Habibie
Jurnal Multidisiplin Dehasen (MUDE) Vol 5 No 3 (2026): Juli
Publisher : LPPJPHKI Universitas Dehasen Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37676/mude.v5i3.11480

Abstract

The Jagir River in Surabaya City faces critical ecological pressure due to the accumulation of urban wastewater along a 10 km segment from Wonokromo to Wonorejo. This study evaluated the River Water Pollution Load Capacity (RWPLC) and its natural self-purification capacity using the static mass balance method and Streeter-Phelps deterministic modeling. The baseline analysis revealed a total capacity deficit for Total Phosphorus (peaking at -628.99 kg/day in the middle segment) and a COD deficit of -4,354.56 kg/day in the downstream. Conversely, BOD, TSS, and the DO Sag Curve profile remained safe, with a minimum critical Dissolved Oxygen (DO) of 5.557 mg/L downstream (Mangrove Area) driven by high natural reaeration and rapid stream velocity (u = 4.51 m/s). Simulations proved that the 50% BOD Load Reduction Scenario is the most effective intervention to permanently eliminate oxygen deficits. Governance policies are recommended to focus on preventive strategies through strict industrial effluent regulation.
Co-Authors Ariesta Sulistyo Asih