KAJIAN TINGKAT SEDIMENTASI PADA ALIRAN DRAINASE PADA FENOMENA EROSI DI CATCHMENT AREA SUMP RIAMKANAN MENGGUNAKAN METODE REVISED UNIVERSAL SOIL LOSS EQUATION (RUSLE) DAN METODE SEDIMENT DELIVERY RATIO (SDR) DI PIT CENTRAL TUTUPAN PT ADARO INDONESIA

Nadila, Fatihahtul (2025) KAJIAN TINGKAT SEDIMENTASI PADA ALIRAN DRAINASE PADA FENOMENA EROSI DI CATCHMENT AREA SUMP RIAMKANAN MENGGUNAKAN METODE REVISED UNIVERSAL SOIL LOSS EQUATION (RUSLE) DAN METODE SEDIMENT DELIVERY RATIO (SDR) DI PIT CENTRAL TUTUPAN PT ADARO INDONESIA. S1 thesis, Universitas Jambi.

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Abstract

Produksi sedimen di Catchment Area Sump Riamkanan meningkatkan sedimentasi yang bermuara ke Sump Riamkanan dan berpotensi mengganggu proses penyaliran tambang. Salah satu penyebab utamanya adalah erosi yang dipengaruhi oleh curah hujan, kemiringan lahan, vegetasi, dan aktivitas manusia. Penelitian ini bertujuan untuk menganalisis kejadian erosi dan tingkat sedimentasi di Sump Riamkanan Pit Central Tutupan PT. Adaro Indonesia Penelitian ini menggunakan metode RUSLE untuk memetakan tingkat bahaya erosi dengan bantuan aplikasi GIS (ArcGis). dan pendekatan SDR untuk memperkirakan akumulasi sedimen. Parameter yang digunakan meliputi data curah hujan dari stasiun Pit Central Tutupan, hasil uji tanah, kelas lereng, penggunaan lahan dan konservasi tanah. Berdasarkan jenis tanah Podsolik Merah Kuning dan kelas kemiringan lereng dibentuk lima satuan lahan (Pods I–V). Setiap peta kemudian dioverlay untuk menghasilkan Klasifikasi Tingkat Bahaya Erosi yang dibagi menjadi lima kelas: sangat ringan, ringan, sedang, berat, dan sangat berat. Untuk mengetahui aliran drainase yang paling banyak menghasilkan sedimentasi, Catchment Area dibagi menjadi tiga bagian berdasarkan titik sampel tanah dan arah aliran air menuju sump, yaitu Area 1, Area 2, dan Area 3. Hasil perhitungan potensi erosi di Catchment Area Sump Riamkanan Pit Central Tutupan dibagi menjadi tiga area aliran air menuju sump. Potensi tanah tererosi di area 1 adalah 1.655.218,40 Bcm/tahun, area 2 sebesar 2.696.173,58 Bcm/tahun, dan area 3 sebesar 4.001.445,52 Bcm/tahun, dengan total potensi erosi mencapai 8.352.837,49 Bcm/tahun. Nilai rata-rata Sediment Delivery Ratio (SDR) untuk area 1 adalah 0,41, area 2 sebesar 0,42, dan area 3 sebesar 0,40. Berdasarkan SDR tersebut, potensi sedimen yang terbentuk dan mengalir ke sump adalah 573.069,76 Bcm/tahun di area 1, 956.974,99 Bcm/tahun di area 2, dan 1.265.170,54 Bcm/tahun di area 3, dengan total potensi sedimen sebesar 2.795.215,29 Bcm/tahun. Dengan demikian, area 3 menghasilkan sedimen terbanyak akibat erosi, diikuti area 2, dan paling sedikit di area 1. Sediment production in the Sump Riamkanan Catchment Area increases sedimentation that flows into Sump Riamkanan and has the potential to disrupt the mine drainage process. One of the main causes is erosion, which is influenced by rainfall, land slope, vegetation, and human activity. This study aims to analyze erosion events and sedimentation levels in the Sump Riamkanan Pit Central Tutupan of PT. Adaro Indonesia. This study uses the RUSLE method to map erosion hazard levels with the help of GIS (ArcGis) applications and the SDR approach to estimate sediment accumulation. The parameters used include rainfall data from the Pit Central Tutupan station, soil test results, slope class, land use, and soil conservation. Based on the Podsolik Merah Kuning soil type and slope class, five land units (Pods I–V) were formed. Each map was then overlaid to produce an Erosion Hazard Classification divided into five classes: very light, light, moderate, heavy, and very heavy. To determine the drainage flow that produced the most sedimentation, the Catchment Area was divided into three parts based on soil sampling points and the direction of water flow towards the sump, namely Area 1, Area 2, and Area 3. The results of erosion potential calculations in the Sump Riamkanan Pit Central Catchment Area are divided into three water flow areas leading to the sump. The potential for soil erosion in area 1 is 1,655,218.40 Bcm/year, area 2 is 2,696,173.58 Bcm/year, and area 3 is 4,001,445.52 Bcm/year, with a total erosion potential of 8,352,837.49 Bcm/year. The average Sediment Delivery Ratio (SDR) for area 1 is 0.41, area 2 is 0.42, and area 3 is 0.40. Based on these SDR values, the potential sediment formed and flowing into the sump is 573,069.76 Bcm/year in area 1, 956,974.99 Bcm/year in area 2, and 1,265,170.54 Bcm/year in area 3, with a total sediment potential of 2,795,215.29 Bcm/year. Thus, area 3 produces the most sediment due to erosion, followed by area 2, and the least in area 1.

Type: Thesis (S1)
Uncontrolled Keywords: Erosi, Sedimentasi, RUSLE, SDR
Subjects: L Education > L Education (General)
Divisions: Fakultas Sains dan Teknologi > Teknik Pertambangan
Depositing User: Nadila
Date Deposited: 17 Sep 2025 06:58
Last Modified: 17 Sep 2025 06:58
URI: https://repository.unja.ac.id/id/eprint/85779

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