IDENTIFIKASI DAN KARAKTER HIDROKIMIA KELUARAN AIRTANAH LEPAS PANTAI (KALP) DI PULAU LOMBOK, KABUPATEN LOMBOK UTARA PROVINSI NUSA TENGGARA BARAT

Hendra Bakti, Rachmat Fajar Lubis, Wilda Naily, Robert M Delinom, Wahyu Purwoko

Abstract


Telah dilakukan identifikasi dan analisis hidrokimia keluaran airtanah lepas pantai (KALP) di daerah Pantai Papak, Kabupaten Lombok Utara, Provinsi Nusa Tenggara Barat. Identifikasi KALP dilakukan dengan pengukuran daya hantar listrik (DHL), tracer 222Rn, hidrokimia dan kandungan kadar nutrien air laut. Kehadiran KALP di daerah penelitian dijumpai dalam bentuk mata air dasar laut dengan kedalaman 8 –10 meter yang diperkuat dengan adanya kandungan 222Rn yang relatif lebih tinggi pada air laut di titik pemunculan KALP bila dibandingkan dengan titik identifikasi yang lainnya. Kisaran DHL air laut di daerah penelitian >40.000 us/cm dan memiliki kandungan nutrient NO3-N (0,24 mg/L), Ntotal (0,18 mg/L), PO4 (0,54 mg/L), Panorganik (0,05 mg/L), Ptotal (0,55 mg/L), sedangkan untuk kandungan NO2-N dan NH4-N tidak terdeteksi.

Keywords


keluaran airtanah lepas pantai, radon (222Rn), daya hantar listrik, nutrien

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