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All Journal Indonesian Journal of Geography Jurnal Sosial Ekonomi Pekerjaan Umum JURNAL TEKNIK HIDRAULIK
Cosmas Bambang Sukatja
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Engineering

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STRATEGI TERPADU PENGELOLAAN PENAMBANGAN GALIAN C DI DAERAH GUNUNGAPI MERAPI Sukatja, Cosmas Bambang
Jurnal Sosial Ekonomi Pekerjaan Umum Vol 9, No 2 (2017)
Publisher : Puslitbang Kebijakan dan Penerapan Teknologi (PKPT), Kementerian PUPR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (959.707 KB)

Abstract

Pasca erupsi  Gunungapi Merapi menghasilkan material vulkanik berupa bahan galian C , terdiri dari batu-batu besar dan kecil, kerikil, pasir, abu vulkanis.  Material tersebut memiliki aspek sosial dan ekonomis penting dalam memberikan nilai tambah kemajuan wilayah sekitarnya. Namun, karena tata kelola manajemennya kurang sinergi dengan kebijakann dari berbagai instansi terkait, masyarakat dan lingkungan, hasil dari penambangannya belum dapat menambah kesejahteraan masyarakat setempat. Keuntungan yang diperoleh baru dirasakan beberapa golongan masyarakat tertentu. Dampak dari penambangan tersebut justru menimbulkan kerusakan lingkungan di dalam atau di luar alur sungai, bahkan sering menimbulkan korban materiil dan jiwa manusia. Kegiatan ini bertujuan untuk mencari cara pengelolaan penambangan galian C berdasarkan kearifan lokal, berbasis masyarakat setempat dan keterpaduan dalam pengelolaan wilayah.Kata kunci : Erupsi Merapi, pengelolaan, penambangan galian C, kerusakan lingkungan
Revitalisasi Sabodam Sebagai Pengendali Aliran Lahar (Studi Kasus Di Daerah Gunungapi Merapi) Cosmas Bambang Sukatja; Ardian Alfianto
JURNAL TEKNIK HIDRAULIK Vol 8, No 1 (2017): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1411.021 KB) | DOI: 10.32679/jth.v8i1.239

Abstract

Mega-eruption of Merapi Volcano 2010 is a large-scale explosive eruption, destroying lava dome, removing cloud columns as high as 4 kilometers and bursts of in various directions at the volcano foot. Approximately 140 millions m3 of pyroclastic material spread through the 13 major rivers that source from Merapi. Lahar flow occurred in almost every river basin located beneath the active cone of Merapi. As a result of the lahar flow, as many as 77 of the 264 units of the sabo dam in the Merapi area were damaged or washed away by the lahar flows. The sabo dam controls the flow of lahar built up across the river channel to hold, accommodate and drain some of the material or sediment in order to carry the flow and pass water downstream. This study was conducted to find the cause of sabo dam damage, and the right solution after the eruption of Merapi 2010. The method used in qualitative descriptive approach. The results of this study were to revitalize sabo dam as lahar flow controller and as a reference in reviewing the master plan of a lahar flow control system in other volcanic areas.
Urban Risk Assessment of Lahar Flows in Merapi Volcano (Study Case: Muntilan Urban Area, Central Java) Cosmas Bambang Sukatja; Sudibyakto Sudibyakto; RPGA Voskuil
Indonesian Journal of Geography Vol 46, No 1 (2014): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3222.564 KB) | DOI: 10.22146/ijg.4991

Abstract

The objective of the research was to analyse probability of lahar flows occurrence in Muntilan urban area,Central Java. By using integrated methods, which involve the numerical simulation program, Geographic InformationSystem (GIS), Remote Sensing (RS) and field verification to produce lahar flows Hazard Map and Risk Map. Muntilanurban area located at western flank of Merapi volcano, and in down stream of Lamat river. The river is Lahar River thatis endangering from Merapi volcano, which flowing down to cuts a cross of that area. Therefore, Muntilan urban areais vulnerable area from lahar flows disaster. Lahar flows, generally occur during intense rainfall on saturated volcanicdeposit in upper stream of river or wall of volcano. Lahar flows are extremely dangerous especially to those living invalley areas near a volcano, which can undercut banks and cause houses destruction situated on the banks, and canbury and destroy resident, structures, infrastructure facilities including roads and bridges. Meanwhile, development ofMuntilan urban area that caused many illegal settlements appears surrounding that area. Occasionally, un-benefit peopleconstructing house in disaster prone area, such as down stream of river side that have lahar flows risk. The research wasconcluded that lahar flow occurrence in 100 years return period will be buried the Muntilan urban area. With the methodsintegrating of GIS, RS, field verification can be done analysing of lahar flows hazard map, and risks map to producerisk assessment in Muntilan urban area.
Co-Authors Ardian Alfianto RPGA Voskuil Sudibyakto Sudibyakto