Electronic Theses and Dissertation

Pantai ujong kareung–suak ribee, kabupaten aceh barat merupakan kawasan pesisir yang rentan terhadap abrasi, erosi, dan banjir rob sehingga dibangun revetment tipe tetrapod sebagai bangunan pelindung pantai. setelah lebih dari satu dekade beroperasi, diperlukan evaluasi untuk mengetahui apakah bangunan masih memiliki kondisi fisik yang baik dan mampu menjalankan fungsi perlindungan pantai secara optimal. penelitian ini bertujuan mengevaluasi kondisi fisik dan kinerja fungsi revetment serta menentukan rekomendasi tindakan berdasarkan hasil evaluasi. penelitian menggunakan pendekatan deskriptif kuantitatif melalui observasi lapangan pada 48 pias pengamatan sepanjang ±4,8 km. kondisi fisik dievaluasi menggunakan indeks kondisi fisik (ikf) berdasarkan kondisi unit tetrapod dan blok kubus mengacu pada pedoman operasi dan pemeliharaan bangunan pengaman pantai tahun 2011. kinerja fungsi dievaluasi menggunakan indeks gangguan fungsi revetment (igfr) berdasarkan parameter overtopping, piping, bangunan liar, dan tumbuhan liar melalui sistem pembobotan. hasil penelitian menunjukkan bahwa seluruh pias memiliki kondisi fisik berkategori baik dengan nilai ikf antara 1,00–1,20. namun demikian, hasil evaluasi fungsi menunjukkan hanya 13 pias (27,08%) yang berkategori baik, sedangkan 35 pias (72,92%) berkategori buruk, dengan gangguan yang paling dominan berupa overtopping. berdasarkan matriks pengambilan keputusan, 13 pias direkomendasikan untuk dilakukan pemantauan rutin, sedangkan 35 pias memerlukan kaji ulang. penelitian ini menyimpulkan bahwa revetment di pantai ujong kareung–suak ribee masih memiliki kondisi fisik yang baik, tetapi belum sepenuhnya mampu menjalankan fungsi perlindungan pantai secara optimal. oleh karena itu, evaluasi kinerja fungsi secara berkala diperlukan sebagai dasar penyusunan program operasi, pemeliharaan, dan pengambilan keputusan terhadap bangunan pengaman pantai di kabupaten aceh barat. kata kunci: revetment, kondisi fisik, kinerja fungsi, evaluasi kinerja, tetrapod, aceh barat.

Ujong Kareung–Suak Ribee Beach, West Aceh Regency, is a coastal area that is highly vulnerable to coastal erosion, shoreline degradation, and tidal flooding. To mitigate these hazards, a tetrapod revetment was constructed as a coastal protection structure. After more than a decade of operation, an evaluation is required to determine whether the structure remains physically sound and capable of performing its intended coastal protection function effectively. This study aimed to evaluate the physical condition and functional performance of the revetment and to determine appropriate maintenance recommendations based on the evaluation results. A descriptive quantitative approach was employed through field observations conducted on 48 survey sections covering approximately 4.8 km of coastline. The physical condition was assessed using the Physical Condition Index (PCI) based on the condition of tetrapod and concrete block armor units in accordance with the 2011 Guidelines for the Operation and Maintenance of Coastal Protection Structures. Functional performance was evaluated using the revetment Functional Disturbance Index (RFDI), which considers overtopping, piping, illegal structures, and vegetation through a weighted scoring system. The results showed that all survey sections were classified as having good physical condition, with PCI values ranging from 1.00 to 1.20. However, only 13 sections (27.08%) demonstrated good functional performance, while 35 sections (72.92%) were classified as poor, primarily due to overtopping. Based on the decision matrix, 13 sections were recommended for routine monitoring, whereas 35 sections require further technical assessment. This study concludes that although the Revetment remains in good physical condition, it has not yet been able to perform its coastal protection function optimally. Therefore, periodic evaluation of functional performance is essential to support operation, maintenance, and decision-making for coastal protection structures in West Aceh Regency. Keywords: revetment, physical condition, functional performance, performance evaluation, tetrapod, West Aceh.