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Simulation of Debris Flow Using “SIMLAR” in the Watershed of Gendol River, Indonesia
https://orcid.org/http://orcid.org/0000-0002-9642-4064
https://orcid.org/http://orcid.org/0000-0003-4745-044X
The eruption of Mount Merapi in 2010 released more than 140 million cubic meters of pyroclastic material, which still settles on cliffs and riverbeds. Gendol River is one of the rivers affected by the accumulation of sediment. When there is heavy rain in the river’s upper reaches, rainwater will carry lava material at high speed called debris flow, which will cause damage to the area in its path. Sediment control buildings such as Sabo dams are built to reduce the impact of debris flows. To predict the impact of debris flows, it could be used using a software application. In this study, the debris flow simulation is used the SIMLAR V.2.1 application. The simulation uses data, namely rain data, to calculate the flood hydrograph using the Nakayasu method. The other data are grain size distribution data to determine the sediment material and a topographic map in the form of DEM to determine the length and area of the simulated watershed and modify the Sabo dam building’s existing conditions in Gendol River. The simulation results show that at the beginning of the simulation hour to 0.5 with a discharge of 0.299 m3/s produces a debris volume of 539.997 m3 with a velocity of 0.198 m/s, at peak discharge with a discharge of 107.729 m3/s has a debris volume of 452,129.320 m3 with a velocity of 1.916 m/s. The simulation at hour of 15 with a discharge of 2.909 m3/s, produces a volume of 75,038.150 m3 with a velocity of 0.451 m/s.
Simulation of Debris Flow Using “SIMLAR” in the Watershed of Gendol River, Indonesia
https://orcid.org/http://orcid.org/0000-0002-9642-4064
https://orcid.org/http://orcid.org/0000-0003-4745-044X
The eruption of Mount Merapi in 2010 released more than 140 million cubic meters of pyroclastic material, which still settles on cliffs and riverbeds. Gendol River is one of the rivers affected by the accumulation of sediment. When there is heavy rain in the river’s upper reaches, rainwater will carry lava material at high speed called debris flow, which will cause damage to the area in its path. Sediment control buildings such as Sabo dams are built to reduce the impact of debris flows. To predict the impact of debris flows, it could be used using a software application. In this study, the debris flow simulation is used the SIMLAR V.2.1 application. The simulation uses data, namely rain data, to calculate the flood hydrograph using the Nakayasu method. The other data are grain size distribution data to determine the sediment material and a topographic map in the form of DEM to determine the length and area of the simulated watershed and modify the Sabo dam building’s existing conditions in Gendol River. The simulation results show that at the beginning of the simulation hour to 0.5 with a discharge of 0.299 m3/s produces a debris volume of 539.997 m3 with a velocity of 0.198 m/s, at peak discharge with a discharge of 107.729 m3/s has a debris volume of 452,129.320 m3 with a velocity of 1.916 m/s. The simulation at hour of 15 with a discharge of 2.909 m3/s, produces a volume of 75,038.150 m3 with a velocity of 0.451 m/s.
Simulation of Debris Flow Using “SIMLAR” in the Watershed of Gendol River, Indonesia
https://orcid.org/http://orcid.org/0000-0002-9642-4064
https://orcid.org/http://orcid.org/0000-0003-4745-044X
The eruption of Mount Merapi in 2010 released more than 140 million cubic meters of pyroclastic material, which still settles on cliffs and riverbeds. Gendol River is one of the rivers affected by the accumulation of sediment. When there is heavy rain in the river’s upper reaches, rainwater will carry lava material at high speed called debris flow, which will cause damage to the area in its path. Sediment control buildings such as Sabo dams are built to reduce the impact of debris flows. To predict the impact of debris flows, it could be used using a software application. In this study, the debris flow simulation is used the SIMLAR V.2.1 application. The simulation uses data, namely rain data, to calculate the flood hydrograph using the Nakayasu method. The other data are grain size distribution data to determine the sediment material and a topographic map in the form of DEM to determine the length and area of the simulated watershed and modify the Sabo dam building’s existing conditions in Gendol River. The simulation results show that at the beginning of the simulation hour to 0.5 with a discharge of 0.299 m3/s produces a debris volume of 539.997 m3 with a velocity of 0.198 m/s, at peak discharge with a discharge of 107.729 m3/s has a debris volume of 452,129.320 m3 with a velocity of 1.916 m/s. The simulation at hour of 15 with a discharge of 2.909 m3/s, produces a volume of 75,038.150 m3 with a velocity of 0.451 m/s.
Simulation of Debris Flow Using “SIMLAR” in the Watershed of Gendol River, Indonesia
Lecture Notes in Civil Engineering
Kristiawan, Stefanus Adi (editor) / Gan, Buntara S. (editor) / Shahin, Mohamed (editor) / Sharma, Akanshu (editor) / Cahyo, Hendy Dwi (author) / Ikhsan, Jazaul (author) / Hairani, Ani (author)
International Conference on Rehabilitation and Maintenance in Civil Engineering ; 2021 ; Surakarta, Indonesia
2022-07-19
9 pages
Article/Chapter (Book)
Electronic Resource
English
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