Penentuan Tingkat Erosi dan Perencanaan Konservasi Lahan di Sub DAS Telagawaja Kabupaten Karangasem Provinsi Bali

Made Sri Sumarniasih, Ni Made Trigunasih, Michael Surbakti

Abstract

The increasing use of natural resources due to population growth and economic development, as well as low public awareness of natural resource conservation, has an impact on accelerating damage to river watersheds. The research aims to determine the level of erosion and its distribution, permitted erosion, conservation planning in the Telagawaja Sub-watershed. The research uses a survey method in taking soil samples based on homogeneous land unit maps. Soil samples were analyzed in the laboratory, erosion calculations used the USLE method. The research results show that the Telagawaja sub-watershed has erosion levels ranging from very light to heavy (0.99-472.19 tons/ha/year). Very light erosion 0.99; 1.53; 5.36 tons/ha/year is found in Homogeneus Land Unit (HLU) I, II, and VII. Heavy erosion 186.64; 221.43; 367.14; 472.19 tons/ha/year is found in HLU V, VI, IV, III. Permissible erosion in the Telagawaja sub-watershed is 11-36.1 tons/ha/year, spread across HLU I is 12.82 tons/ha/year; HLU II of 36.10 tons/ha/year; HLU III of 21.73 tons/ha/year; HLU IV of 24.48 tons/ha/year; HLU V of 13.55 tons/ha/year; HLU VI of 11.00 tons/ha/year; HLU VII is 15.05 tons/ha/year. Conservation actions that can be carried out are by increasing the plant management factor (C) of peanuts with straw mulch of 4 tons/ha (HLU III, IV, V and VI), increasing land management actions by making terracing with medium construction benches (HLU III and IV) and good bench terrace construction (HLU V and VI).

Keywords

Erosion Rate, Permissible Erosion Conservation Planning, Telagawaja Sub-Watershed

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References

Aflizar, Saidi A, Husnain, Indra R, Darmawan, Harmailis, Hiroaki S, Wakatsuki T, Masunaga T. 2010. Soil erosion characterization in an agricultural watershed

in West Sumatra, Indonesia. Tropics. 19(1):29–42. doi:10.3759/tropics.19.29.

Andawayanti U. 2019. Pengelolaan Daerah Aliran Sungai (DAS) Terintegrasi. Malang: UB Press.

Andriyani I, Wahyuningsih S, Arumsari RS. 2020. Penentuan tingkat bahaya erosi di wilayah DAS bedadung kabupaten jember. J Ilm Rekayasa Pertan dan Biosist. 8(1):1–11. doi:10.29303/jrpb.v8i1.122.

Arsyad S. 2012. Konservasi Tanah dan Air. UPT Produksi Media Informasi Lembaga Sumberdaya. Bogor: Institut Pertanian Bogor.

BPDAS Unda Anyar. 2018. DAS Prioritas. Provinsi Bali

Eichmanns C, Lechthaler S, Zander W, Vélez Pérez M, Blum H, Thorenz F, Schüttrumpf H. 2021. Sand trapping fences as a nature-based solution for coastal protection: An international review with a focus on installations in Germany. Environ-MDPI. 8(12). doi:10.3390/environments8120135.

Harliando DP, Setyawan C, Mawandha HG. 2023. Spatial Modeling of Vegetation Cover for Soil Erosion Control Based on Arc GIS and the RUSLE Models. J Tek Pertan Lampung. 12(1):14. doi:10.23960/jtep-l.v12i1.14-27.

Kreklow J, Steinhoff-Knopp B, Friedrich K, Tetzlaff B. 2020. Comparing rainfall erosivity estimation methods using weather radar data for the state of hesse (Germany). Water (Switzerland). 12(5). doi:10.3390/w12051424.

López-Vicente M, Calvo-Seas E, Álvarez S, Cerdà A. 2020. Effectiveness of cover crops to reduce loss of soil organic matter in a rainfed vineyard. Land. 9(7):1–16. doi:10.3390/land9070230.

Lukas MC. 2014. Eroding battlefields: Land degradation in Java reconsidered. Geoforum. 56:87–100. doi:10.1016/j.geoforum.2014.06.010. http://dx.doi.org/10.1016/j.geoforum.2014.06.010.

Mohamadi MA, Kavian A. 2015. Effects of rainfall patterns on runoff and soil erosion in field plots. Int Soil Water Conserv Res. 3(4):273–281. doi:10.1016/j.iswcr.2015.10.001. http://dx.doi.org/10.1016/j.iswcr.2015.10.001.

Pahlevi RS, Hasan H, Devy SD. Study Level of Soil Erodibility on Pit 3000 Block 3, PT. Bharinto Ekatama, Kutai Barat Regency East Kalimantan Province. Jl Tek Mineral FT UNMUL. 6(1): 17-20

Pasaribu PHP, Rauf A, Slamet B. 2018. Kajian Tingkat Bahaya Erosi Pada Berbagai Tipe Penggunaan Lahan di Kecamatan Merdeka Kabupaten Karo. J Serambi Eng. 3(1). doi:10.32672/jse.v3i1.357.

Prasad I, Trigunasih N, Sumarniasih M. 2021. Prediksi Erosi dan Perencanaan Konservasi Tanah dan Air pada Daerah Aliran Sungai Yeh Ho di Kabupaten Tabanan. Agroekoteknologi Trop. 10(2):161–171. https://ojs.unud.ac.id/index.php/JAT.

Prasetyo A, Setyawan C, Ngadisih, Tirtalistyani R. 2021. Vegetation cover modelling for soil erosion control in agricultural watershed. IOP Conf Ser Earth Environ Sci. 653(1). doi:10.1088/1755-1315/653/1/012033.

Purba YSBR, Puja IN, Sumarniasih MS. 2021. Erosion prediction and conservation planning in the bubuh sub-watershed, bangli regency. Water Conserv Manag. 4(2):103–105. doi:10.26480/WCM.02.2020.103.105.

Setyawan C, Susanto S, Lee C-Y. 2018. Land and water conservation practices in tropical agricultural watershed. J Degrad Min L Manag. 5(53):2502–2458. doi:10.15243/jdmlm. www.jdmlm.ub.ac.id.

Sumarniasih MS. 2015. Erosion prediction for determination Soil and water conservation based local wisdom in Ayung Watershed Bali, Indonesia. http://www.resjournals.com/ARJ.

Tarigan DR, Mardiatno D. Pengaruh erosivitas dan topografi terhadap kehilangan tanah pada erosi alur di daerah aliran sungai secang desa hargotirto kecamatan kokap kabupaten kulonprogo.

Vopravil J, Janeček M, Tippl M. 2007. Revised soil erodibility K-factor for soils in the Czech Republic. Soil Water Res. 2(1):1–9. doi:10.17221/2100-swr.

Wayan Suprianingsih N, Wayan Sandi Adnyana I, Wayan Diara I. 2023. Prediksi Erosi dan Perencanaan Konservasi Tanah dan Air di Daerah Aliran Sungai Pakerisan Provinsi Bali. Ecotrophic. 17(1):69–80.

Wen X, Zhen L, Jiang Q, Xiao Y. 2023. A global review of the development and application of soil erosion control techniques. Environ Res Lett. 18(3). doi:10.1088/1748-9326/acbaac.

Yin S, Nearing MA, Borrelli P, Xue X. 2017. Rainfall Erosivity: An Overview of Methodologies and Applications. Vadose Zo J. 16(12):1–16. doi:10.2136/vzj2017.06.0131.

DOI: https://doi.org/10.20961/agrotechresj.v7i1.76266

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