sediment

Some sediment brought to the surface with the nodules gets dumped back into the ocean.

"We make decisions on how best to manage increased flood risk on a site-specific basis, using specialist knowledge and evidence of how each river might respond to sediment removal."

In some areas, officials are planning to use roads to capture sediment, due to the amount of rubble and ash still in the burn scars, said L.A.

Pollution and toxins mix into the sediment where whales feed on small invertebrates and fish.

One indication is the sediments on the ocean floor.