Analisis Spasial Kerawanan Genangan untuk Rekayasa Tata Air di Perkebunan Kelapa Sawit TBM Berbasis SIG

Abstract

JOHAN GRACELYNO SIHOMBING. Analisis Spasial Kerawanan Genangan untuk Rekayasa Tata Air di Perkebunan Kelapa Sawit TBM Berbasis SIG. Dibimbing oleh MERRY GLORIA MELIALA dan MANIJO. Penelitian ini bertujuan menganalisis karakteristik topografi, mengidentifikasi tingkat kerawanan genangan, serta menyusun rekomendasi pengelolaan air pada areal tanaman belum menghasilkan (TBM) di PT Surya Intisari Raya 1. Penelitian menggunakan pendekatan kuantitatif berbasis Sistem Informasi Geografis (SIG) dengan memanfaatkan data digital elevation model (DEM), elevasi, kemiringan lereng, dan titik observasi lapangan. Analisis dilakukan melalui interpolasi kriging, overlay spasial, dan metode skoring. Hasil penelitian menunjukkan bahwa area penelitian didominasi topografi datar hingga landai. Tingkat kerawanan genangan didominasi kelas sedang seluas 32,21 ha (56,22%), diikuti kelas tinggi seluas 23,31 ha (40,69%), sedangkan kelas rendah mencakup 1,76 ha (3,07%). Berdasarkan hasil tersebut direkomendasikan penerapan platform dengan rasio 4:1, 2:1, dan 1:1 sesuai tingkat kerawanan, serta tiga zona prioritas pembangunan embung. Hasil penelitian menunjukkan bahwa analisis berbasis SIG dapat mendukung penyusunan rekomendasi pengelolaan air pada areal TBM secara efektif.

JOHAN GRACELYNO SIHOMBING. Spatial Analysis of Flood Susceptibility for Water Management Engineering in Immature Oil Palm Plantations Using GIS. Supervised by MERRY GLORIA MELIALA and MANIJO. This study aimed to analyze topographic characteristics, identify flood susceptibility levels, and develop water management recommendations for immature oil palm plantations (TBM) at PT Surya Intisari Raya 1. The research employed a Geographic Information System (GIS)-based approach using digital elevation model (DEM), elevation, slope, and field observation data. Spatial analysis was conducted using Kriging interpolation, spatial overlay, and a scoring method. The results showed that the study area was predominantly characterized by flat to gently sloping terrain. Areas with moderate flood susceptibility covered 32.21 ha (56.22%), followed by high susceptibility covering 23.31 ha (40.69%), while low susceptibility accounted for only 1.76 ha (3.07%). Based on these findings, platform ratios of 4:1, 2:1, and 1:1 are recommended according to flood susceptibility level, along with the establishment of three priority reservoir zones. The findings demonstrate that GIS-based analysis can effectively support water management planning in immature oil palm plantations.