Penerapan Metode Geolistrik Resistivitas untuk Konfigurasi Bawah permukaan sebagai Dasar Pengelolaan Sumber daya Air
Abstract
Abstract: Limited clean water availability during the dry season has become a serious concern for the community of Jambean Hamlet due to the lack of subsurface information for groundwater development planning. This community service initiative aimed to employ the electrical resistivity approach to describe subsurface conditions to guide water resource management. The program consisted of coordination with the local government and community; geoelectrical surveys using the Direct Current (DC) Resistivity method with the Wenner–Schlumberger array along two survey lines; data processing using Res2DInv software; subsurface interpretation; and dissemination of the results to the community. Four major subsurface layers were identified by the interpretation, with a possible shallow unconfined aquifer located between 7 and 18 meters below the surface. These results led to suggestions for the management of water resources, such as safeguarding recharge areas, limiting groundwater abstraction, improving recharge through infiltration wells and biopores, and, where required, considering deeper aquifer excavation. The initiative delivers scientific knowledge to help decision-making on groundwater development and promote sustainable water resource management in the community.
Abstrak: Keterbatasan ketersediaan air bersih pada musim kemarau menjadi permasalahan yang dihadapi masyarakat Dusun Jambean akibat belum tersedianya informasi mengenai konfigurasi bawah permukaan sebagai dasar penentuan lokasi pengembangan sumber air. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk menerapkan metode geolistrik resistivitas guna memperoleh informasi konfigurasi bawah permukaan sebagai dasar pengelolaan sumber daya air. Kegiatan diawali dengan koordinasi bersama pemerintah desa dan masyarakat, dilanjutkan dengan survei geolistrik menggunakan metode Direct Current (DC) Resistivity konfigurasi Wenner–Schlumberger pada dua lintasan pengukuran, pengolahan data menggunakan perangkat lunak Res2DInv, interpretasi hasil, serta penyampaian rekomendasi kepada masyarakat. Hasil interpretasi menunjukkan bahwa konfigurasi bawah permukaan tersusun atas 4 lapisan utama, dengan indikasi akuifer dangkal pada kedalaman sekitar 7–18 m yang berpotensi dimanfaatkan sebagai sumber air tanah. Berdasarkan hasil tersebut, disusun rekomendasi pengelolaan sumber daya air berupa konservasi daerah resapan, peningkatan imbuhan air tanah melalui sumur resapan dan biopori, pengendalian pemanfaatan air tanah, serta pertimbangan eksplorasi akuifer yang lebih dalam apabila diperlukan. Kegiatan ini menghasilkan informasi ilmiah yang dapat dimanfaatkan sebagai dasar pengambilan keputusan dalam pengembangan sumber air bersih serta mendukung pengelolaan sumber daya air secara berkelanjutan.Keywords
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DOI: https://doi.org/10.31764/am.v5i6.40700
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