Electronic Theses and Dissertation

Bendungan Keuliling berada di Desa Bak Sukon, Kecamatan Kuta Cot Glie,
Kabupaten Aceh Besar, Provinsi Aceh, yang sudah dibangun sejak tahun 2000 dan
disahkan tahun 2008. Oleh karena itu dibutuhkannya pemantauan pada bendungan,
salah satunya yaitu pemantauan rembesan air. Penelitian ini dilakukan menggunakan
metode Geolistrik Resistivitas 2D konfigurasi Wenner – Schlumberger untuk
mengidentifikasi rembesan air pada Bendungan Keuliling. Akuisisi data dilakukan
sebanyak dua lintasan dengan masing – masing panjang lintasan 81meter
menggunakan 28 elektroda dan spasi 3meter, proses pengolahan data menggunakan
software Res2Dinv. Hasil pemodelan pada lintasan 1 menunjukkan adanya 3 zona
rembesan (3,4 Ωm – 6,7 Ωm) yang di interpretasikan sebagai lapisan lempung pasiran
jenuh air. Pada lintasan 2 diidentifikasi terdapat kemenerusan rembesan (3,8 Ωm – 8,0
Ωm) yang berjarak 25 meter dari lintasan 1 yang diinterpretasikan sebagai lapisan
lempung pasiran jenuh air. Dengan demikian, metode geolistrik resistivitas mampu
untuk mengidentifikasi rembesan air pada bendungan.

Kata Kunci : Bendungan Keuliling, Rembesan, Metode Resitivitas, Wenner –
Schlumberger, Aceh Besar.

Keuliling Dam is located in Bak Sukon Village, Kuta Cot Glie Subdistrict, Aceh Besar Regency, Aceh Province. The dam has been under construction since 2000 and was officially inaugurated in 2008. Therefore, continuous monitoring is necessary, particularly for water seepage, which is a critical factor in dam safety. This study was conducted using the 2D Electrical Resistivity method with the Wenner–Schlumberger configuration to identify potential water seepage in the Keuliling Dam area. Data acquisition was carried out along two survey lines, each 81 meters in length, using 28 electrodes with 3-meter spacing. The data were processed using Res2Dinv software. The modeling results on Line 1 revealed three seepage zones with low resistivity values (ranging from 3.4 Ωm to 6.7 Ωm), which were interpreted as water-saturated sandy clay layers. On Line 2, a continuation of the seepage zone was identified (with resistivity values ranging from 3.8 Ωm to 8.0 Ωm), located approximately 25 meters from Line 1, and similarly interpreted as saturated sandy clay. Thus, the 2D electrical resistivity method has proven effective in identifying seepage within the dam structure. Keywords: Keuliling Dam, Seepage, Resistivity Method, Wenner–Schlumberger, Aceh Besar.