Tinjauan Kerentanan, Risiko dan Zonasi Rawan Bahaya Rockfall di Kulonprogo, Yogyakarta

Hizbaron, Dyah Rahmawati; Hadmoko, Danang Sri; Wibawa, Samodra; Dalimunthe, Syarifah Aini; Sartohadi, Junun

doi:10.23917/forgeo.v24i2.5021

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…The rockfall hazard has the potential to inflict dangerous and severe impacts on human life (van Westen and Greiving 2017), but the risks and hazards of rockfall are varying based on the conditions of the area (Ansari et al 2016;Budetta 2004). The natural and physical characteristics of the hilly area were suspected to be the cause of rockfall events, and the hazard level will be higher if the area were experiencing hills excavation for transportation facilities (Hizbaron et al 2010). Along the roads produced from excavated hills, rockfall is definitely to be one of the most potential threats that could happen, but not all segments of the roads have the same levels of hazard.…”

Section: Introductionmentioning

confidence: 99%

“…The rockfall incidents have occurred several times in Yogyakarta. Hizbaron et al (2010) have identified 16 rockfall events that occurred in 1970-2009 in Yogyakarta and discovered that the high vulnerability area of rockfall was located along the transportation route. Afterward, a rockfall incident occurred in 2011 on Yogyakarta Southern Mountain hills that fell into settlements and caused casualties (Mustopo 2015).…”

Section: Introductionmentioning

confidence: 99%

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Slope mass rating-based analysis to assess rockfall hazard on Yogyakarta Southern Mountain, Indonesia

Triana

Hermawan

2020

Geoenviron Disasters

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In the Parangtritis Beach tourism area located in the Southern Mountain of Yogyakarta, karst hills were excavated to build the main accessing road and produce some of long and very steep slopes along the sides of the road. But still, there was none of the slope reinforcement installed along the road. Meanwhile, at several nearby locations within Southern Mountain, rockfall incidents have occurred many times even caused casualties. The potential of rockfall hazard also could be found in the main road of Parangtritis Beach as the study area. The purpose of this study is to determine the rockfall hazard assessment along the main road using Slope Mass Rating (SMR) analysis with the additional parameter of the slope height and the rock block size. The necessary data obtained by direct measurement and laboratory test. Geomechanics analysis, stereographic projection analysis, and hazard parameters weighting were carried out to produce the Rockfall Hazard Zonation Map of the study area. Based on 17 measurement stations, there are 4 (four) rockfall hazard classes in the study area, i.e., very low, low, moderate, and high. The class of very low, which also included road segments without slope, has the largest percentages of 83.83%, followed by the classes of moderate, low, and high with the percentage of 7.16%, 4.28%, and 4,19%, respectively. SMR was assumed as the most significant parameter that influences the rockfall hazard zonation. Historical rockfall points were overlaid over the Rockfall Hazard Zonation Map to validate the predicted hazard zones. Since 91.23% of the rockfall occurred in the moderate and high hazard classes, the zonation map considered reliable to predict future rockfall. This study also identified several landslide potential zones and provides the recommendation of slope reinforcement to be installed in the study area.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Slope mass rating-based analysis to assess rockfall hazard on Yogyakarta Southern Mountain, Indonesia

Triana

Hermawan

2020

Geoenviron Disasters

View full text Add to dashboard Cite

show abstract

“…The rockfall hazard has the potential to inflict bad and severe impacts on human life (van Westen & Greiving, 2017), but the risks and hazards of rockfall are varying based on the conditions of the area (Ansari et al, 2016;Budetta, 2004). The natural and physical characteristics of the hilly areas were suspected to be the cause of rockfall events and the hazard level will be higher if the area experiencing hills excavation for transportation facilities (Hizbaron et al, 2010). Along the roads produced from excavated hills, rockfall is certainly to be one of the most potential threats that could happen, but not all segments of the roads have the same levels of hazard.…”

Section: Introductionmentioning

confidence: 99%

“…The rockfall incidents have occurred several times in Yogyakarta. Hizbaron et al (2010) in his research have identified 16 rockfall events that occurred in 1970-2009 in Yogyakarta.…”

Section: Introductionmentioning

confidence: 99%

Slope Mass Rating-based Analysis to Assess Rockfall Hazard on Yogyakarta Southern Mountain, Indonesia

Triana

Hermawan

2020

Preprint

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In the Parangtritis Beach tourism area located in the Southern Mountain of Yogyakarta, karst hills were excavated to build the main accessing road and produce some of long and very steep slopes along the sides of the road. But still, there was none of the slope reinforcement installed along the road. Meanwhile, at several nearby locations within Southern Mountain, rockfall incidents have occurred many times even caused casualties. The potential of rockfall hazard could also occur in the main road of Parangtritis Beach as the study area. The purpose of this study is to determine the rockfall hazard assessment along the main road using Slope Mass Rating (SMR) analysis with the additional parameter of the slope height and the rock block size. The necessary data obtained by direct measurement and laboratory test. Geomechanics analysis, stereographic projection analysis, and hazard parameters weighting were carried out to produce the Rockfall Hazard Zonation Map of the study area. Based on 17 measurement stations, there are 4 (four) rockfall hazard classes in the study area, i.e. very low, low, intermediate, and high. The very low class, which also included road segments without slope, has the largest percentage of 83.83%, followed by the classes of intermediate, low, and high with the percentage of 7.16%, 4.28%, and 4,19%, respectively. SMR was assumed as the most significant parameter that influences the rockfall hazard zonation. To validate the predicted hazard zones, historical rockfall points were overlaid over the Rockfall Hazard Zonation Map. Since 91.23% of the rockfall occurred in the intermediate and high hazard classes, the zonation can be considered reliable to predict future rockfall. This study also identified several landslide potential zones and provides the recommendation of slope reinforcement to be installed in the study area.

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Towards measurable resilience: Mapping the vulnerability of at-risk community at Kelud Volcano, Indonesia

et al. 2018

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Tinjauan Kerentanan, Risiko dan Zonasi Rawan Bahaya Rockfall di Kulonprogo, Yogyakarta

Cited by 6 publications

References 6 publications

Slope mass rating-based analysis to assess rockfall hazard on Yogyakarta Southern Mountain, Indonesia

Slope mass rating-based analysis to assess rockfall hazard on Yogyakarta Southern Mountain, Indonesia

Slope Mass Rating-based Analysis to Assess Rockfall Hazard on Yogyakarta Southern Mountain, Indonesia

Towards measurable resilience: Mapping the vulnerability of at-risk community at Kelud Volcano, Indonesia

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