Vulnerability Assessment of Landslide Areas in Ci Manuk Upstream Watershed, Garut District, West Java Province

Muhammad Edgar Fauzan, Astrid Damayanti, Ratna Saraswati

Abstract


Landslide is challenging to detect and predict. Settlements are not always located on ideal land according to designated areas, such as settlements in a landslide area. Ci Manuk Upstream watershed, Garut District, West Java Province, has critical land due to human intervention. The environment is more sensitive to the components in the environmental system, so when it rains, landslide disasters are prone to happen. This study aims to predict and analyze the vulnerability settlement of landslide in Ci Manuk Upstream watershed, Garut District, West Java Province. The research method is done gradually, beginning with using Stability Index Mapping (SINMAP) method to generate a landslide potential area, then using a spatial analysis method to determine the landslide-prone area and finally assessing the vulnerability of the settlements in the landslide area. The results show that 43.88% of the total area is a potential landslide area, then 19.04% is a high landslide-prone area, and 30.80% is the vulnerability of the settlement areas in the high landslide area. This study also shows that the landslide potential area is dominant at slope >25%, dystrudept soil type, and rainfall rate of >3500 mm/year. The landslide-prone settlement areas tend to be in the landslide zone of SINMAP modeling, and vulnerable settlements have tended to be south of the watershed because of the low quality of buildings and high population densities.

Keywords


landslide; settlement; SINMAP; vulnerability.

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References


BNPB, Indeks Rawan Bencana Indonesia, Jakarta: Badan Nasional Penanggulangan Bencana, 2017.

Arsyad, Sitanala, Konservasi Tanah dan Air, Bandung: IPB Press, 2006.

Arifin, Samsul, Carolila, Ita and Winarso, Cahol, “Implementasi Penginderaan Jauh dan SIG untuk Inventarisasi Daerah Rawan Bencana Longsor (Provinsi Lampung)”, Jurnal Penginderaan Jauh, vol. 3, pp. 77-86, 2006.

Kumajas, Mithel, “Inventarisasi dan Pemetaan Rawan Longsor Kota Manado – Sulawesi Utara”, Forum Geografi, vol.20, pp. 190-197, 2006.

Badan Perencanaan Pembangunan Daerah (Bappeda), Rencana Kerja Pemerintah Daerah (RKPD) Provinsi Jawa Barat, Bandung: Badan Perencanaan Pembangunan Daerah Provinsi Jawa Barat, 2008.

Somantri, Lili, Kajian Mitigasi Bencana Longsor Lahan Dengan Menggunakan Teknologi Penginderaan Jauh. Jurnal Seminar Ikatan Geografi Indonesia, 2008.

Balai Pengelola Daerah Aliran Sungai (BPDAS) Cimanuk-Citanduy, Kejadian Bencana Tanah Longsor di Kabupaten Garut, Garut: BPDAS, 2016.

Nugroho, Sutopo Purwo, Evaluasi Penanggulangan Bencana 2015 dan Prediksi Bencana 2016, Jakarta: Badan Nasional Penanggulangan Bencana, 2016.

Sulaiman, W.N.A, “Susceptibility of Shallow Landslide in Fraser Hill Catchment, Pahang Malaysia”, Journal of Enviroment Asia, pp. 66-72, 2010.

Wang, Kuo-Lung, Development of shallow 1% seismic landslide potential map based on Newmark’s displacement: the case study of Chi-Chi earthquake, Taiwan, Taiwan: Environmental Earth Sciences, 2009.

Setiadi, Tedy, “Perancangan Sistem Informasi Geografis Pemetaan Daerah Rawan Tanah Longsor, Mitigasi dan Manajemen Bencana di Kabupaten Banjarnegara”, Jurnal Kesehatan Masyarakat, vol. 7, pp. 33-42, 2013.

Deb, S.K., and El-Kadi A.I, “Susceptibility assessment of shallow landslides on Oahu, Hawaii, under extreme-rainfall events”, Journal of Geomorphology, vol. 108, pp. 219-233, 2009.

Andriono, Bagus, Wilayah Rentan Tanah Longsor di Sepanjang Alur Ci Tarik DA Ci Tarik Kabupaten Sukabumi, Depok: Universitas Indonesia, 2012.

Wibowo, Agung, Identifikasi Wilayah Rentan Longsor di Kecamatan Cicalengka, Kabupaten Bandung, Depok: Universitas Indonesia, 2009.

Triwahyuni, Lisa, Sobirin, and Ratna Saraswati, “Analisis Spasial Wilayah Potensi Longsor dengan Metode SINMAP dan SMORPH di Kabupaten Kulon Progo, Daerah Istimewa Yogyakarta”, Industrial Research Workshop and National Seminar, pp. 69-76, 2017.

Pack, R.T., Tarboton, D.G., and Goodwin, C.N, A Stability Index Approach Terrain Stability Hazard Mapping. SINMAP User Manual, Utah State University, Vancouver: Forest Renewal British Columbia, 1998.

Izhom, M. Baried, Kerentanan Wilayah Tanah Longsor di Daerah Aliran Ci Catih, Kabupaten Sukabumi, Jawa Barat, Depok: Universitas Indonesia, 2012.

Nandi, Longsor, Bandung: Jurusan Pendidikan Geografi FPIPS UPI, 2007.

Ringler, C, Mapping South African Farming Sector Vulnerability to Cilmate Change and Variability, Pretoria: International Food Policy Research Institute, 2009.

Klimes, Jan, “Analysis Of Preparatory Factors Of Landslides, Vsetínské Vrchy Highland, Czech Republic”, Acta Research Reports, no. 17, pp. 47-53, 2008.

Hadmoko, Danang Sri, Djati Mardiatno, and Fajar Siddik, Analisis Stabilitas Lereng untuk Zonasi Daerah Rawan Longsor di DAS Secang Kulonprogo dengan Menggunakan Model Deterministik, Jurnal Remote Sensing and GIS, 2009.

Mubekti, “Mitigasi Daerah Rawan Tanah Longsor Menggunakan Teknik Pemodelan Sistem Informasi Geografis”, Jurnal Teknik Lingkungan, vol. 9, pp. 121-129, 2008.

Pack, R, SINMAP II: A Stability Index Approach To Tereain Stability Hazart Mapping, Utah: Utah State University, 2005.

Sitorus, S, Pengembangan Lahan Berpenutupan Tetap sebagai kontrol Terhadap Faktor Resiko dan Bencana Longsor, Jakarta: Direktorat Jendral Penataan Ruang Departemen Pekerjaan Umum, 2006.

Suranto, J.P, Kajian Pemanfaatan Lahan Pada Daerah Rawan Bencana Tanah Longsor di Gunungluruh, Cilongok, Banyumas, Semarang: Tesis Program Pascasarjana Magister Teknik Pembangunan Wilayah dan Kota UNDIP, 2008.




DOI: http://dx.doi.org/10.18517/ijaseit.10.1.6755

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