RAMMS

Rapid Mass Movement Simulation
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How do I speed up my debris flow simulation?Problem: My debris flow simulation takes ages to calculate. I use a 0.5m resolution. Do you have any suggestions on how to speed up my simulation? And s...

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RAMMS ERROR: Planes must be parallelOctober 25th 2021Problem:I get an error when I import the shapefile of my release areas. What is going wrong?Answer:The polygon shapefile most probably contains ...

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Forest Cover HeightOctober 14th 2021Question:We have a query about the Zh-height value assumed in the calculations. The manual notes that Zh varies between 5m and 30m, with a default value of 30m, ...

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Overhanging faceOctober 14th 2021Question:I want to model rockfalls from a rockface above a road. But the rockface has an area which is overhanging. Does your software allow for overhanging rockfa...

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Why use a hydrograph for debris flow modelling?Answer:There a several good reasons.Firstly, hazard mitigation experts are often interested in the flow behaviour only near the fan. Calculating the m...

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Answer:Debris flowThe “best” constitutive model for debris flows is still a very open question in the scientific community. We recommend using the Voellmy model until a better model is found. Voell...

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How is yield stress (cohesion) used in RAMMS::Debrisflow?Answer:Since Version 1.6.20 the basic Voellmy equation has been modified to include yield stress (cohesion), see equation below, where C is ...

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How long does it take to perform a simulation?Answer The time required to simulate an avalanche or a debris flow is a function of the finite volume grid resolution and the size of the calculation d...

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