À Analisis Sebaran pH, BOD, TSS, COD dan DO pada Anak Sungai Kenali Besar dengan Metode Inverse Distance Weighting (IDW) | Herawati | Jurnal Ilmiah Universitas Batanghari Jambi

Analisis Sebaran pH, BOD, TSS, COD dan DO pada Anak Sungai Kenali Besar dengan Metode Inverse Distance Weighting (IDW)

Peppy Herawati, Asih Suzana, Muhammad Dimas Purwanto

Abstract


This study aims to assess the water quality of Anak Sungai Kenali Besar based on pH, Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), and Dissolved Oxygen (DO) parameters, as well as to analyze their spatial distribution using the Inverse Distance Weighting (IDW) method. Sampling was conducted at three points (upstream, middle, and downstream) using the grab sampling method, followed by laboratory analysis and spatial modeling with Geographic Information System software. The results showed that pH (6.67–6.90), TSS (14.30–21.50 mg/L), and BOD (2.00–2.79 mg/L) still met the Class I–II water quality standards according to Government Regulation No. 22 of 2021. However, COD values (21.39–24.54 mg/L) were relatively high, and DO (3.13–4.04 mg/L) was below the Class I threshold, particularly in the downstream segment. IDW distribution maps revealed an increasing pattern of COD and BOD toward the downstream and a decreasing pattern of DO, indicating organic pollution pressure from surrounding community activities. Overall, the water quality of Anak Sungai Kenali Besar still meets standards for several parameters, but special attention is needed regarding organic pollutant loads, especially in the downstream section.

Keywords


water quality, Inverse Distance Weighting, COD, BOD, DO, Anak Sungai Kenali Besar

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DOI: http://dx.doi.org/10.33087/jiubj.v26i3.6592

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