EVALUASI DRAINASE EKSISTING DAN PERENCANAAN ULANG DRAINASE TERTUTUP DI BANDAR UDARA SYUKURAN AMINUDDIN AMIR LUWUK

Bandar Udara Syukuran Aminuddin Amir terletak di Desa Bubung,Kecamatan Luwuk Selatan, Kabupaten Banggai, Sulawesi Tengah. Permasalahan utama yang dihadapi adalah masih digunakannya drainase terbuka di sisi barat runway strip. Selain itu, kondisi tanah di sekitar saluran berupa tanah kapur yang sulit menyerap air saat intensitas hujan tinggi. Akibatnya, terjadi genangan air yang meluas ke area runway karena saluran tidak mampu menampung debit air hujan serta
aliran dari bukit di sebelah barat runway strip. Jika tidak segera diatasi, hal ini dapat menganggu operasional pesawat. Maka dari itu, direncanakan pembangunan saluran drainase tertutup menggunakan U-Ditch di sisi barat runway strip.
Perencanaan saluran drainase tertutup di Bandar Udara Syukuran Aminuddin Amir diawali dengan pengumpulan data, salah satunya data curah hujan. Data ini digunakan untuk menghitung curah hujan maksimum 10 tahun ke depan menggunakan metode Log Pearson III dan intensitas hujan, lalu dilanjutkan dengan perhitungan debit limpasan maksimum. Berdasarkan hasil tersebut, dilakukan perhitungan dimensi saluran tertutup untuk periode 10 tahun mendatang. Setelah
perencanaan selesai, langkah berikutnya adalah menyusun Rencana Anggaran Biaya.
Berdasarkan analisis intensitas curah hujan maksimum selama 60 menit untuk periode 10 tahun ke depan di sisi barat runway strip Bandar Udara Syukuran Aminuddin Amir, diperoleh nilai sebesar 26,5 mm/jam. Debit rencana yang dihitung mencapai 0,9 m³/detik. Dengan kondisi tersebut, direncanakan dimensi saluran tertutup menggunakan beton precast U-Ditch dengan ukuran tinggi dan lebar masingmasing 1,2 meter. Berdasarkan perhitungan Rencana Anggaran Biaya, total dana
yang dibutuhkan untuk pekerjaan perencanaan ulang drainase tertutup ini adalah sebesar Rp 11.892.900.000.
Kata Kunci: Saluran Tertutup, Perencanaan Ulang, Intensitas Curah Hujan,Distribusi Log Pearson III, Rencana Anggaran Biaya (RAB).
============================================================
Syukuran Aminuddin Amir Airport is located in Bubung Village, South Luwuk District, Banggai Regency, Central Sulawesi. The main issue faced at the airport is the continued use of open drainage channels on the western side of the runway strip. Additionally, the surrounding area consists of limestone soil, which has low permeability, especially during heavy rainfall. As a result, water accumulation occurs and spreads onto the runway area due to the drainage channels being unable to accommodate both the rainfall runoff and the surface flow from the hills located to the west of the runway strip. If not addressed promptly, this situation could disrupt aircraft operations. Therefore, a closed drainage system using U-Ditch concrete is planned for the western side of the runway strip.The planning of the closed drainage system at Syukuran Aminuddin Amir Airport began with data collection, including rainfall data. This data was used to calculate the maximum rainfall for the next 10 years using the Log Pearson III distribution and rainfall intensity, followed by the calculation of maximum runoff
discharge. Based on these results, the dimensions of the closed drainage system were determined for a 10-year period. After the planning phase, the next step was the preparation of the Budget Plan (RAB).Based on the analysis of maximum rainfall intensity over 60 minutes for the next 10 years on the western side of the runway strip, a value of 26.5mm/hour was obtained. The calculated design discharge was 0.9 m³/second. Given these conditions, a precast concrete U-Ditch with a height and width of 1.2 meters each was selected as the drainage solution. According to the Budget Plan calculation, the total estimated cost required for the redesign of the closed drainage system is IDR 1.892.900.000.
Keywords: Closed Drainage, Redesign Planning, Rainfall Intensity, Log Pearson III Distribution, Budget Plan (RAB).