Depends on where you place the openings. I thought about that sort of setup when I used gravel for substrates, but went with a reverse-flow UG filter instead. Kept pretty much all the debris from settling in the substrate, it was picked up by the prefilters on the powerheads (1 on each plate).
Where are you wanting to direct the water flow? Will there be a hob or canister filter intake in one corner of the tank? The idea of the jets is to move debris toward a pickup or collection point rather than settling into the gravel. How much flow and from where will depend on how the tank is set up and scaped.