RAMMS
Rapid Mass Movement Simulation
RAMMS软件是由瑞士原版引进，操作界面和程序语言为英语，为了准确表达原版问答内容，FAQ栏目内容采用英语，供您参考！
Missing text in colorbar and plotsFebruary 3rd 2021Problem:I updated RAMMS today and the text is now missing from the scale bar and from the line profile plot. Any fix for this?Answer:You can fix ... Illegal subscript range: ZAHL.September 21st 2021Problem:I entered the license key, but with one character too little. Now when I want to start RAMMS, this warning appears. I can not start RAMMS at... No map found, continue search?October 25th 2021Problem:I have two tif-files, a topographic map and an orthophoto, but I don’t understand why they don’t appear in the program and why it says that it... February 2nd 2021Problem:I try to run a simulation, but instead of the results, I get the following error message:Error-Messages:% Unable to allocate memory: to make array.Not enough space% Executi... Question: I tried the new update, but when I try to open an old file, the following error message appears:% Tag name _JUSTCOMPUTEDRANGE is undefined for structure IDLITVISDATASPACE.% Execution halt... 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... Does RAMMS take terrain curvature into account?Answer:Since Version 1.6.20, the normal force N now includes centrifugal forces arising from the terrain curvature. We use the method proposed by Fisc... How is cohesion used in RAMMS::Avalanche?Answer:Since Version 1.6.20 the basic Voellmy equation has been modified to include cohesion, see equation below, where C is the cohesion of the flowing mat... What numerical solution technique does RAMMS use?Answer:In all RAMMS versions (Avalanche and Debrisflow) up to Version 1.5.01, an ENO (Essentially Non-Oscillatory) scheme was used to numerically so... When and why does the Voellmy model work well for Avalanches?Answer:AvalanchesThe Voellmy model – coupled with the calibrated parameters – can be used to(1) predict the runout distance and(2) pred... What friction models are used in RAMMS?Answer:RAMMS (Avalanche and Debrisflow modules) employs a Voellmy-fluid friction model. This model divides the frictional resistance into two parts:a dry-Coul... 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... 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... 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... 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 ... 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 ... 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, ... 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... |