The Hazard of Soil Erosion and Sediment Yield Prediction for Krueng Mane Watershed in Indonesia

Annisa Dini Safira1, Azmeri Azmeri1, Eldina Fatimah1, Asri Syahrial2, Tuti Rahmawati3
1 Universitas Syiah Kuala, Engineering Faculty, Civil Engineering, Syech Abdur-rauf No. 7 Darussalam 23111, Banda Aceh, Indonesia
2 Ministry of Public Works and Housing (PUPR) BWS Sumatera-I, Indonesia
3 Aceh Regional Settlement Infrastructure Center, Aceh Besar, Indonesia

Abstract

Safira, A. D., Azmeri, A., Fatimah, E., Syahrial, A. & Rahmawati, T. (2023). The Hazard of Soil Erosion and Sediment Yield Prediction for Krueng Mane Watershed in Indonesia. Bulg. J. Agric. Sci., 29(4), 615–622

Land use in several locations at the Krueng Mane watershed has shifted from forests to rice fields, palm oil plantations, and settlements. Changes in land use supported by high rainfall can potentially increase soil erosion, or erosion rates and result in river silting due to sedimentation. This study aims to determine the rate of soil erosion, sedimentation, and distribution of soil erosion hazards in the Krueng Mane watershed. The erosion rate was calculated using the Geographic Information System (GIS)-based Universal Soil Loss Equation (USLE) method. The calculation shows that the erosion rate at the Krueng Mane watershed was 17,614.82 Mg·ha–1·y–1, and the sediment yield was 67,412,186.16 Mg·y–1. The erosion hazard level at the Krueng Mane watershed was dominated by a very mild category of 53.58% with an area of 22,287.46 Ha, followed by mild category (16.94%), moderate (23.00%), severe (5.40%), and extreme (1.08%). The interaction between USLE parameters significantly affected the average annual soil loss rate. Land with a high soil erosion hazard is closely correlated with steep gradients and changes in land use. Mild and very mild rates of soil loss are associated with conservation practices and protected areas. The result of this study is beneficial for planning land scenarios as interventions to reduce erosions.

Keywords: Krueng Mane Watershed; Soil erosion hazard; USLE; ArcGIS 10.4

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