Pendugaan Distribusi Air Lindi dengan Geolistrik Metode ERT di TPA Piyungan, Bantul, DIY

Fajri Ramadhan; Farida Prasasti D.R; Febby Firizqy; Tjahyo Nugroho Adji

doi:10.22146/mgi.38813

Pendugaan Distribusi Air Lindi dengan Geolistrik Metode ERT di TPA Piyungan, Bantul, DIY

https://doi.org/10.22146/mgi.38813

Fajri Ramadhan^(1*), Farida Prasasti D.R⁽²⁾, Febby Firizqy⁽³⁾, Tjahyo Nugroho Adji⁽⁴⁾

(1) Department Of Environmental Geography Faculty Of Geography UGM
(2) Department Of Environmental Geography Faculty Of Geography UGM
(3) Department Of Environmental Geography Faculty Of Geography UGM
(4) Department Of Environmental Geography Faculty Of Geography UGM
(*) Corresponding Author

Abstract

TPA Piyungan menampung sampah hingga 550 ton/hari, sehingga air lindi (leachate) yang dihasilkan akan lebih besar dan dapat berdampak pada airtanah. Tujuan dari penelitian ini adalah untuk mengidentifikasi pencemaran air lindi pada airtanah di sekitar TPA Piyungan, dan dilakukan dengan menggunakan metode Electrical Resistivity Tomography (ERT) konfigurasi Wenner Beta, flownet, dan uji sifat fisik-kimia air. Hasil dari penelitian adalah (1) aliran airtanah secara dominan bergerak ke arah Barat Laut dari TPA Piyungan yang merupakan kawasan padat permukiman; (2) hasil geolistrik metode ERT di Dusun Pleret menunjukkan adanya distribusi air lindi pada kedalaman 5-20 m dengan nilai resistivitas 1-3 Ώmeter, sementara kedalaman airtanahnya juga berada pada kedalaman 5-15 meter; (3) hasil pengukuran DHL, TDS, dan salinitas yang menunjukkan sebagian sumur memiliki nilai di atas baku mutu yang dipersyaratkan untuk air minum. Oleh karena itu, airtanah sekitar TPA Piyungan terutama bagian Barat Laut telah tercemar akibat air lindi.

Keywords

Air Lindi; Electrical Resistivity Tomography; Geolistrik; Pencemaran Airtanah

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DOI: https://doi.org/10.22146/mgi.38813