Dinamika Luas Badan Air dan Keramba Jaring Apung di Waduk Jatiluhur Kabupaten Purwakarta Periode 2017-2025

Athifa Nissa Nalani, Dr.rer.nat Riza Yuliratno Setiawan, S.Kel., M.Sc.

2026 | Skripsi | MANAJ. SUMBER DAYA PERIKANAN

Waduk Jatiluhur memiliki fungsi penting sebagai sumber irigasi, pembangkit listrik, penyedia air baku, serta kawasan perikanan budidaya. Perubahan luas badan air dan sebaran keramba jaring apung (KJA) perlu dipantau karena dapat menggambarkan dinamika hidrologi waduk dan tekanan pemanfaatan ruang perairan. Penelitian ini bertujuan menganalisis perubahan luas badan air dan KJA di Waduk Jatiluhur Kabupaten Purwakarta periode 2017-2025 menggunakan citra Sentinel-1. Klasifikasi badan air dan KJA dilakukan dengan menggunakan metode random forest melalui Google Earth Engine. Hasil penelitian menunjukkan luas badan air ketika musim hujan relatif lebih besar (84.008.313-85.089.223 m²) dibandingkan pada saat musim kemarau (82.477.745-83.965.077 m²). Luas KJA di Waduk Jatiluhur berkisar 1.227.913-2.464.474 m² ketika musim hujan dan 1.124.146-2.464.474 m² pada saat musim kemarau. Dinamika luas badan air waduk tidak hanya dipengaruhi curah hujan, tetapi juga dipengaruhi pengelolaan debit air dan aktivitas budidaya di Waduk Jatiluhur.

Jatiluhur Reservoir serves key functions as a source of irrigation, power generation, raw water supply, and aquaculture. Monitoring changes in surface water area and the distribution of floating net cages (KJA) is important because they reflect the hydrological dynamics of the reservoir and pressure on aquatic space utilization. This study aimed to analyze changes in surface water area and floating net cages in Jatiluhur Reservoir, Purwakarta Regency, from 2017 to 2025 using Sentinel-1 imagery. Surface water and KJA were classified using the random forest method through Google Earth Engine. The results showed that the surface water area during the rainy season was relatively larger (84,008,313-85,089,223 m²) than during the dry season (82,477,745-83,965,077 m²). The KJA area in Jatiluhur Reservoir ranged from 1,227,913 to 2,464,474 m² during the rainy season and from 1,124,146 to 2,464,474 m² during the dry season. The dynamics of reservoir surface water area were influenced not only by rainfall, but also by water discharge management and aquaculture activities in Jatiluhur Reservoir.

Kata Kunci : Sentinel-1, Waduk Jatiluhur, badan air, Keramba Jaring Apung, penginderaan jauh