CHROMOPHORIC DISSOLVED ORGANIC MATTER (CDOM) DAN NUTRIEN TERLARUT DI SUMBER AIR DI BALI UTARA
DOI:
https://doi.org/10.23887/jstundiksha.v12i1.59811Kata Kunci:
sumber air, curah hujan, chromophoric dissolved organic matter, nutrien terlarutAbstrak
Penelitian ini dilakukan dengan tujuan untuk menentukan absorbansi chromophoric dissolved organic matter (CDOM) dan konsentrasi nutrien terlarut di sumber air di Sanggalangit, Kecamatan Gerokgak, Kabupaten Buleleng yang terletak di Bali Utara, serta menganalisis pengaruh curah hujan terhadap sumber air ini. Subjek dalam penelitian ini adalah air yang diambil dari sumber air di Sanggalangit yang telah disaring menggunakan kertas saring GF/F 0,7 µm. Objek penelitian ini adalah absorbansi CDOM dan konsentrasi nutrien terlarut. Pengukuran absorbansi CDOM dan konsentrasi nutrien dilakukan dengan menggunakan instrumen spektrofotometer Ultraviolet Visible (UV-Vis). Dari nilai absorbansi yang diperoleh, kemudian dihitung parameter S275-295, S350-400, dan E2:E3. Hasil penelitian menunjukkan bahwa nilai dari S275-295 dan S350-400 menunjukkan kecenderungan nilai maksimum dan minimum yang terbalik dengan curah hujan. Curah hujan berpengaruh terhadap rasio E2:E3, tetapi tidak terlihat mempengaruhi konsentrasi nutrien terlarut (nitrat, nitrit, amonia, dan fosfat). Berdasarkan peraturan yang berlaku, kualitas air di sumber air Sanggalangit tergolong baik secara kimiawi.
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