HIDROGEOKIMIA AIRTANAH TIDAK TERTEKAN KAWASAN PESISIR DI PEMUKIMAN NELAYAN KECAMATAN TEUPAH SELATAN, KAB. SIMEULUE, PROVINSI ACEH

Wisnu Arya Gemilang; Guntur Adhi Rahmawan

doi:10.14203/risetgeotam2018.v28.636

HIDROGEOKIMIA AIRTANAH TIDAK TERTEKAN KAWASAN PESISIR DI PEMUKIMAN NELAYAN KECAMATAN TEUPAH SELATAN, KAB. SIMEULUE, PROVINSI ACEH

Wisnu Arya Gemilang, Guntur Adhi Rahmawan

Abstract

Kecamatan Teupah Selatan merupakan salah satu kawasan pesisir Kabupaten Simeulue yang dijadikan sebagai sentra kegiatan perikanan dan kelautan. Permasalahan pencemaran akibat kegiatan antropogenik manusia maupun pengaruh airlaut dikhawatirkan menjadi pemicu menurunnya kualitas airtanah di pesisir Teupah Selatan dan sekitarnya. Oleh sebab itu, penelitian terhadap kondisi kualitas airtanah dan kelayakannya berdasarkan beberapa parameter fisika dan kimia di Teupah Selatan sangat penting dilakukan. Analisis dan interpretasi hidrokimia airtanah dilakukan dengan menggunakan diagram Piper serta perhitungan rasio Na/Cl dan Cl/HCO₃. Hasil analisa menunjukkan bahwa fasies airtanah daerah penelitian didominasi oleh fasies MgHCO₃ diikuti oleh fasies CaHCO₃. Secara keseluruhan airtanah di kawasan pesisir Teupah Selatan dan sekitarnya masuk dalam kategori memenuhi syarat untuk dikonsumsi.

South Teupah Sub District is one of coastal areas in Simeulue District that becomes the center of marine and fisheries activities. Pollution issues due to anthropogenic factors as well as seawater influence are feared to trigger groundwater quality declination in South Teupah coast area. Study regarding groundwater quality condition and consumption advisability according to hydrogeochemical analysis is essential. Physical and chemical assessment of groundwater parameters were employed. Groundwater hydro-chemical analysis and interpretation were done by employing Piper diagram and ratio calculation of Na/Cl and Cl/HCO3-. Analysis result indicated that groundwater facies in the study area is predominated by MgHCO3 facies, followed by CaHCO3 facies. Overall, groundwater in the South Teupah coast and surrounding can be consumed.

Keywords

Hydrogeochemical, groundwater, unconfined aquifer, coastal, Simeulue

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DOI: http://dx.doi.org/10.14203/risetgeotam2018.v28.636