Main Article Content
Abstract
This study aims to investigate the effect of the road network on the results of the analysis of the level of degraded land at Tanjung Aur watershed, Bengkulu Province.
The research method involves digital analysis of all the data affecting erosion and degraded land. The level of degraded land is defined as (Erosion + Slope + Percentage of Canopy Cover + Management), whereas the erosion itself is determined by the Universal Soil Loss Equation model and formulated as A = R x K x LS x C x P. All parameters are collected and then performed the analysis to produce as a map of the level of degraded land. Prior to the calculation of erosion and the level of degraded land, it is first made a map of land units which is the result of overlay analysis among land erodibility, slope and land use maps.
In the first phase analysis, the calculation of erosion and the level of degraded land is done prior to the inclusion of road network, while in the second phase, calculation are done after the inclusion of road network. The results of the two analyzes are then compared to determine the effect of the inclusion of road network on the results of the analysis of the level of degraded land, either on the effect on the category changes in the level of degraded land and its coverage.
The results showed that there were 690.42 hectares (4.7%) of the study area (14,684.86 hectares) whose the level of degraded land was changed as a result of the inclusion of road network, from the level of "Potentially Degraded" to the "Slightly Degraded".
Article Details
References
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References
Arsyad, S. (2010). Konservasi Tanah dan Air. Edisi kedua. IPB Press
Bohre, P. and Chaubey, O.P. (2014). Restoration of degraded lands through plantation forests. Global Journal of Science Frontier Research 14, 18-27.
Department of Forestry (Departemen Kehutanan), (1998). Pedoman Penyusunan Rencana Teknik Lapangan-Rehabilitasi Lahan dan Konservasi Tanah, Jakarta
Gibbs, H.K. and Salmon, J.M. (2015). Mapping the world's degraded lands. Journal of Applied Geography, 57,12-21.
Hardjowigeno, S. (2007). Ilmu Tanah. Akademika Pressindo, Jakarta.
Kartodihardjo, H. (2008). Pengelolaan Sumberdaya Alam dan Lingkungan Hidup, Seminar Lingkungan Hidup dan Sumberdaya Alam, Universitas Bengkulu, Bengkulu
Ministry of Forestry (Kementerian Kehutanan), (2009). Peraturan Menteri Kehutanan RI Nomor : P. 32/Menhut-II/2009 tentang Tata Cara Penyusunan Rencana Teknik Rehabilitasi Hutan dan Lahan DAS, Jakarta.
Nawir, A.A., Murniati and Rumboko, L. (2008), Rehabilitasi Hutan di Indonesia : Akan Kemanakah Arahnya Setelah Lebih Dari Tiga Dasawarsa ?, CIFOR, Bogor.
Oktaviano, Sulistyo, B., dan Suhartoyo, H. (2013). Pengaruh Jaringan Jalan Pada Besarnya Erosi Permukaan (Studi Kasus Di Das Tanjung Aur, Provinsi Bengkulu), Jurnal Naturalis, 2(2), 213-221.
Prasetya and Gunawan, T., (2012). Pemanfaatan citra penginderaan jauh dan sistem informasi geografis untuk pemetaan lahan kritis di daerah Kokap dan Pengasih Kabupaten Kulonprogo. Jurnal Bumi Indonesia 1, 281-290.
Rahim, S.E, (2006), Pengendalian Erosi Tanah Dalam Rangka Pelestarian Lingkungan Hidup, Penerbit Bumi Aksara, Jakarta
Sulistyo, B., (2008), Pengaruh Generalisasi Unit Lahan pada Besarnya Erosi, Jurnal Ilmu Kehutanan, 2(1). ISSN : 0126–4451.
Sulistyo, B., (2011). Pemodelan Spasial Lahan Kritis Berbasis Raster Di DAS Merawu Kabupaten Banjarnegara Melalui Integrasi Citra Landsat 7 ETM+ dan SIG. Disertasi. Universitas Gadjah Mada, Yogyakarta.
Sulistyo, B., Gunawan, T., Hartono, Danoedoro, P., Martanto, R., (2017), Proposed Model On Levels of Degraded Land At Merawu Watershed, Banjarnegara Regency, Central Java Province, Indonesia, Biotropia, 24(3), 220-229.
Tarigan, S.D. (2012). Methods for delineating degraded land at Citarum Watershed, West Java, Indonesia. Journal of Tropical Soils 17, 267-274.
Wischmeier, W.H. and Smith, D.D. (1978). Predicting Rainfall Erosion Losses : A Guide to Conservation Planning. USDA Agriculture Handbook No. 37, USA.