Kajian Spasial Kerentanan Airtanah terhadap Pencemaran di Kota Jember dengan Menggunakan Metode SINTACS

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Published: Jun 3, 2021
DOI: https://doi.org/10.23887/mkg.v22i1.32795
Keywords:
Airtanah, Pencemaran, SINTACS, Kerentanan

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Erik Febriarta
Universitas Gadjah Mada
Sutanto Trijuni Putro
Universitas Negeri Yogyakarta
Ajeng Larasati
Universitas Gadjah Mada

Abstract

Pemetaan spasial kerentanan airtanah terhadap pencemaran merupakan bagian dari pengelolaan keberlangsungan sumber daya air. Kerentanan airtanah terhadap pencemaran dapat diketahui dari parameter geologi dan sifat hidrogeologi. Tujuan dari penelitian ini adalah mengetahui zona kerentanan airtanah terhadap pencemaran di Kota Jember. Metode yang digunakan adalah pemodelan multi kriteria dengam mempertimbangan sifat hidrogeologi airtanah dengan metode SINTACS. Parameter yang digunakan untuk penilaian kerentanan antara lain Kedalaman freatik/soggiacenza (S), infiltrasi/infiltrazione (I), kondisi tak jenuh/non saturo (N), tekstur tanah/tipologia della copertura (T), media akuifer/acquifero (A), kondivitas hidrolik/hydrolic conductivity (C), kemiringan lereng/superficie topografica (S). Setiap nilai dari masing-masing parameter kerentanan diberi faktor pembobot untuk mendapatkan skenario kerentanan airtanah terhadap pencemaran. Perhitungan dengan penilaian bobot diperlukan untuk pemodelan atau sekenario dampak pencemaran. Perhitungan dari nilai dan bobot diperoleh dari penilaian linier seluruh variabel dengan menghasilkan nilai indeks kerentanan kemudian dikelaskan terhadap tingkat kerentanan airtanah. Berdasarkan hasil penelitian diketahui dua kelas kerentanan. Tingkat kerentanan airtanah terhadap pencemaran agak tinggi dengan luas 26 km2 (70%) dan kerentanan tinggi seluas 11 km2 (30%) dari luas wilayah kota Jember. Faktor yang dominan mempengaruhi antara lain parameter kedalaman freatik airtanah, laju infiltrasi dan zona tak jenuh. Secara umum tingkat kerentanan airtanah terhadap pencemaran agak tinggi.

Article Details

Issue
Vol. 22 No. 1 (2021)
Section
Articles

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