I'd like to start harvesting rainwater instead of relying on a well, but these 'spurts' you're talking about will the primary issue with a catching system. I'll

I'd like to start harvesting rainwater instead of relying on a well, but these 'spurts' you're talking about will the primary issue with a catching system. I'll probably just make a quick gravel->sand->activated charcoal filter in order to capture the bulk droppings, bugs, or whatever runs down the collection surface.