How do I speed up my debrisflow 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 sometimes I get this error message:
Error-Messages:
Unable to allocate memory: to make array.
Not enough space
Execution halted at: RAMMS_OPENBINARYOUTPUT 2237
Answer:
There are several important issues that affect your simulation speed and also your (RAMMS) memory management:
- Dump Step: By increasing the dump step (when starting a simulation, e.g. 10s instead of 5s), you decrease the amount of memory needed to open a simulation file.
- Calculation domain: Do you use a narrow calculation domain? If not, please have a look in the manual (section 3.5.4) on how to define an ideal calculation domain.
- Simulation resolution: A very good (=small) simulation resolution increases the amount of memory needed to open a simulation file.
- Do you use a large ortho-image that you overlay? This could also be a memory problem. Reduce the resolution of your ortho-image (do not forget to change the .tfw file too) and try again.