Hi everyone! I'm a graduate student working on flood modeling for a large watershed (around 27,000 km²) for my thesis. My methodology includes running hydrologic modeling of the entire watershed but focusing my floodplain simulations in a specific study area. I'll be using software such as SWAT+ for hydrologic modeling and HEC-RAS 2D for floodplain simulations, analyzing multiple 30-year rainfall datasets from various monitoring stations and likely conducting multiple scenario runs and calibration iterations. I'm looking to build a PC that can handle this workload without either underbuilding or overspending. I would really appreciate advice on the following: What would be the ideal CPU? How much RAM should I realistically aim for, considering prices are high? And is a GPU worth investing in for HEC-RAS 2D (if so, what's the recommended VRAM)? If possible, could you also provide a full build suggestion? Thanks in advance for any help!
3 Answers
Honestly, with the price of high-end components, you might find it beneficial to look into cloud-based solutions for your modeling tasks. Offloading some of the compute-intensive processing could save you a lot of hassle and might even be more cost-effective in the long run.
From my experience in water resources modeling, RAM is crucial. For your study area, I recommend at least 32GB, though 64GB would be better given the scale of your project. For CPUs, look at options like the 7800X3D or 13700K with 12+ cores, as they handle SWAT+ efficiently. Regarding GPUs, HEC-RAS 2D can utilize them, and a used 3060 Ti with 8GB would suffice. Expect to spend around $1400 for a build including those specs, with RAM costing around $300. Don't forget to factor in an NVMe drive for faster data access, since model outputs can be quite large!
For HEC-RAS 2D, you'll want to focus on clock speed and core count—you can't compromise on speed for the sake of more cores. I didn't find specific system requirements for SWAT+, but here's a source for HEC-RAS: Check out the HEC's optimization page for detailed specs. If you have any links or guidelines for SWAT+, that would be great!
I appreciate the link! I'm mainly looking for system requirements for SWAT+ as well.
Thanks for the advice! I’ll make sure to consider the NVMe drive for the speed boost.