1. Install a big cartridge filter with a 50 micron cartridge such as the HB-20-50W that can be hosed off when it gets plugged.
Housings are about $50 + shipping and cartridges about $30 each.
2. Make a settling chamber with 3 pieces of 2" PVC pipe, 20 ft long, connected in parallel, and installed horizontally. Make provision for a drain so the sediment can be washed out.