S. Alina1*, L. E. L. Suryajaya2
1Departemen Teknik Sipil dan Lingkungan, Universitas Indonesia, Depok, INDONESIA 2 Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Sai Kung, HONG KONG
*Corresponding author: sadira.alina@ui.ac.id
Estimasi Peningkatan Biochemical dan Chemical Oxygen Demand di Kolom Air Berdasarkan Kandungan Organik Sedimen: Studi Kasus Daerah Aliran Sungai Cileungsi, Kabupaten Bogor
S. Alina(1)*, L. E. L. Suryajaya(2)
1Departemen Teknik Sipil dan Lingkungan, Universitas Indonesia, Depok, INDONESIA
2Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Sai Kung,
HONG KONG
*Corresponding author: sadira.alina@ui.ac.id
INTISARI
Penurunan kualitas air sungai tidak hanya dipengaruhi oleh masukan beban limbah cair, tetapi juga oleh akumulasi polutan pada sedimen yang bertindak sebagai reservoir. Penelitian ini bertujuan untuk memetakan sebaran kandungan materi organik sedimen dan menghitung pengaruhnya secara kuantitatif terhadap dinamika nilai Biochemical Oxygen Demand (BOD) dan Chemical Oxygen Demand (COD) di kolom air Daerah Aliran Sungai Cileungsi, Kabupaten Bogor. Pemantauan dilakukan pada delapan titik pengamatan (TP1–TP8) di sepanjang segmen sungai. Hasil analisis menunjukkan bahwa persentase materi organik atau organic matter (OM) sedimen berfluktuasi pada kisaran 1,6% hingga 4,0%, dengan tingkat akumulasi terendah di TP3 dan tertinggi di TP5. Uji statistik mengonfirmasi adanya korelasi linear positif antara OM sedimen dengan BOD (r = 0,839) dan COD (r = 0,804). Pemodelan regresi menunjukkan secara empiris bahwa dinamika OM sedimen memiliki korelasi signifikan (P-value < 0,05) sebesar 70,4% dengan fluktuasi BOD (R2 = 0,704) dan 64,7% fluktuasi COD (R2 = 0,647) di perairan. Implikasi dari penelitian ini menegaskan bahwa evaluasi dan pemodelan kualitas perairan yang komprehensif memerlukan pemahaman mendalam mengenai mekanisme dan besaran pengaruh dari properti sedimen.
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