Sudibyakto Sudibyakto
Faculty of Geography, Universitas Gadjah Mada

Published : 20 Documents
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Journal : Indonesian Journal of Geography

OpenLISEM Flash Flood Modelling Application in Logung Sub-Catchment, Central Java Nurritasari, Fitrie Atviana; Sudibyakto, Sudibyakto; G. Jetten, Victor
Indonesian Journal of Geography Vol 47, No 2 (2015): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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Abstract

Juwana Catchment and Logung Sub-catchment in particular has been suffering several major past flood events with significant loss. This study conducted an assessment of flood risk by using OpenLISEM as physical soil and hydrological model to generate the single storm flash flood occurrences. The physical input data were collected from remote sensing image interpretation, field observation and measurement and literature review. There are three return periods chosen as scenarios that represent rainfall intensity in Logung Sub-Catchment. Model validation was done by adjusting initial moisture content and saturated hydraulic conductivity values to equate the calculated total discharge with the measured total discharge in several chosen dates. The results show increases in most of modeled hydrological parameter with respect to increasing of rainfall intensity.
Urban Risk Assessment of Lahar Flows in Merapi Volcano (Study Case: Muntilan Urban Area, Central Java) Sukatja, Cosmas Bambang; Sudibyakto, Sudibyakto; Voskuil, RPGA
Indonesian Journal of Geography Vol 46, No 1 (2014): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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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.
Participatory implementation within climate change related policies in urbanized area of Indonesia Suarma, Utia; Hizbaron, Dyah Rahmawati; Sudibyakto, Sudibyakto; Nurjani, Emilya
Indonesian Journal of Geography Vol 50, No 2 (2018): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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Abstract

Geographically, Indonesia has been subjected towards various climate change related phenomena. This research aim at evaluation of participatory implementation towards climate change related policy which has been set in Indonesia. The research method derived from qualitative framework developed by UNESCO. The research took RAN-API or National Action Plan upon Climate Change Adaptation which has been established since 2013. The document has been integrated within National Medium Term Plan launched at 2015 up to 2019. The research revealed that participation has been inclusive to many stakeholder involved within climate change adaptation program. Furthermore, encouragement needs to be carried out at all level especially in urbanized area. Local to national government has pivotal role to introduce many activities engaged to climate change adaptation. At different array, the research also revealed that many participation has been initiated independently by non-government organization as well as local stakeholder which need to be documented in order to ensure its merits.