here in the uk that would be "fly tipping" or dumping
you might also get fined by these guys
https://www.gov.uk/report-wreck-material
Report wreck material
Report wreck material, eg
parts of a ship or its cargo, to the Receiver of Wreck. You must report any material you recover within 28 days, or you could be fined £2,500.
Reporting wreck material gives the
legal owner the opportunity to have their property returned.
How to report wreck material
Send the ‘Report of wreck and salvage’ form to the Receiver of the Wreck (the address is on the form).
You can also get a copy of the form from your the receiver or your local coastguard.
Receiver of Wreck
row@mcga.gov.uk
02380 329 474
Find out about call charges
What counts as wreck material
Wreck material includes things found on the sea shore or in tidal
water that have come from a ship, aircraft or hovercraft (vessels). This could be
parts of the vessel, its cargo or
equipment.
There are 4 main categories:
flotsam - goods that have remained afloat after being
lost from a ship that has sunk
jetsam - things that have been cast
overboard from a ship that was in
danger of sinking
derelict - property that has been abandoned at sea without hope of recovering it, which could be vessels or cargo
lagan - goods that have been buoyed (so they can be recovered) before being cast
overboard from a ship that then sinks
Wreck material doesn’t normally include:
boats that have come off their moorings
buoys, like marker or
mooring buoys
It does include buoys that form part of
fishing equipment.