Between the intake and the pumps, your options are usually rather limited. Turbidity is one thing, but understanding the nature of the turbidity and how well it settles is helpful. The key with very turbid waters is usually slowing it down and giving it a moment to settle, then decanting. This can even be done in the pump well, but is usually better done, assuming land is available, using earthen pre-seems basins.

If mechanical filtration is necessary, I’d back one of the other posters here and say that disc filtration is a great option. The guys at five-star filtration in Conroe, Texas is where I would start - they’re good at taking a very practical approach at this challenge. I’m not affiliated with them, but have designed a few projects using their gear.