breakwaters- A barrier built out into the sea to protect a coast or harbor from the force of waves
faecal coliform-
silting - Fill or block with silt
tidal flushing - action of saltwater entering an estuary twice a day during the high tides. It renews the salinity and nutrients to the estuary and removes artificially introduced toxins in the environment.
sea change- A profound or notable transformationurban stormwater-
silting-
tidal flushing-
dredging- Clean out the bed of (a harbor, river, or other area of water) by scooping out mud, weeds, and rubbish with a dredge.
introduced plants-
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