ANALISA SPASIAL SEBARAN EROSI DI DAS AIR BETUNG DENGAN METODE USLE MENGGUNAKAN GIS (Geografis Information System)

Barrorotul Azizah; Elpita Aisah; Didi Ardiansyah

doi:10.26877/jitek.v10i1/Mei.19404

ANALISA SPASIAL SEBARAN EROSI DI DAS AIR BETUNG DENGAN METODE USLE MENGGUNAKAN GIS (Geografis Information System)

Barrorotul Azizah, Elpita Aisah, Didi Ardiansyah

Abstract

Along with rapid population growth, human needs for food also continue to increase. However, on the other hand, land as the main factor in agricultural production continues to decline both in quality and quantity. Decreased soil quality can occur due to erosion. Erosion is the process of loose soil grains from their parent in a place and the material is transported by water flow or wind. The process of erosion is determined by hydrological factors including rain intensity, topography, soil character, land cover vegetation, and land use. The Air Betung River Basin Sub-Regional Area, with high rainfall, has the potential for erosion which results in continuous scouring which can cause landslides and changes in land use. Based on this, an analysis of the distribution of erosion in the Air Betung River Sub-Watershed was carried out using the USLE method, then mapping was carried out using the Geographic Information System (GIS) system with Arch GIS. The aim of this research is to determine the distribution of erosion in the Air Betung Watershed, Pagar Alam City, then the results of this research are mapped using Arch GIS. The results of this mapping include land use maps, rainfall index maps, slope slope maps, Soil type index, soil erosivity index map. The map shows that the types of soil found in the Air Betung watershed consist of 3 types, namely, A leosol & latosol cokku, A podmerkun & podcokun, Yellowish Red Podsolk. The highest level of erosivity in the Air Betung watershed is 1207.5 tons/ha/year, and the lowest level is 0.155 tons/ha/year. The slope level ranges from 8 to 40%.

Keywords

Erosion, GIS ,Watershed

Full Text:

PDF

References

Apriani, N., Arsyad, U., & Mapangaja, B. (2021). Prediksi Erosi Berdasarkan Metode Universal Soil Loss Equation (Usle) Untuk Arahan Penggunaan Lahan Di Daerah Aliran Sungai Lawo. Jurnal Hutan Dan Masyarakat, 13(1), 49–63. https://doi.org/10.24259/jhm.v13i1.10979

Arifandi, F., & Ikhsan, C. (2019). Pengaruh Sedimen Terhadap Umur Layanan Pada Tampungan Mati (Dead Storage) Waduk Krisak Di Wonogiri Dengan Metode Usle (Universal Soil Losses Equation). Matriks Teknik Sipil, 7(4), 430–439. https://doi.org/10.20961/mateksi.v7i4.38482

Herawati, T. (2010). Analisis Spasial Tingkat Bahaya Erosi Di Wilayah DAS Cisadane Kabupaten Bogor (Spatial Analysis of Erosion Danger Level at Cisadane Watershed Area Bogor District). Jurnal Penelitian Hutan Dan Konservasi Alam., Vol. VII(4), 413–424.

Lathifah, R. N. U. R., Geografi, P. S., Geografi, F., & Surakarta, U. M. (2018). Analisis spasial besar laju erosi metode usle di das merawu.

Putra, A. K. (2021). Pemetaan Kawasan Rawan Erosi Menggunakan Metode Usle ( Universal Soil Loss Equation ) Studi Kasus Das Ciliwung Tengah ( Mapping Of Erosion Prone Areas Using Usle Method ( Universal Soil Loss Equation ) Case Study Of Central Ciliwung Watershed ). Jurnal Artesis, 1(1), 88–95. http://journal.univpancasila.ac.id/index.php/ARTESIS/article/view/2871/1514

Ramadhani, D. A., Mulyanto, D., & Sudarto, L. (2020). Analisis Tingkat Bahaya Erosi Dengan Metode Usle Untuk Arahan Konservasi Tanah Di Daerah Lereng Gunung Ijen, Kabupaten Banyuwangi Jawa Timur. JURNAL TANAH DAN AIR (Soil and Water Journal), 16(1), 12. https://doi.org/10.31315/jta.v16i1.4005

Samsidar, S. (2022). Analisis Laju Erosi Menggunakan Metode Usle (Universal Soil Loss Equation) di Sekitar Sub Daerah Aliran Sungai (Das) Batang Limun Provinsi Jambi. Jurnal Penelitian Fisika Dan Terapannya (JUPITER), 4(1), 29. https://doi.org/10.31851/jupiter.v4i1.8872

Sutapa, I. W. (2010). Analisis Potensi Erosi Pada Daerah Aliran Sungai (DAS) Di Sulawesi Tengah.SMARTek,8(3),169–181. http://jurnal.untad.ac.id/jurnal/index.php/SMARTEK/article/view/637

DOI: https://doi.org/10.26877/jitek.v10i1/Mei.19404