Regressive delta
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The Świna and its regressive delta |
A regressive delta is a body of sediment that forms at the landward end of a gut.[1]
In contrast to river deltas, regressive deltas are not caused by fluvial sedimentation but by marine sedimentation. During storm events, sediment-bearing sea water is pressed through the gut into the adjacent lagoon. Sedimentation takes place immediately after the water has passed the gut because the velocity of the current strongly decreases. The surplus water will leave the lagoon at leeward guts.
Well-known regressive deltas on the Baltic Sea coast are those of the Prerower Strom in northeast Germany and the Świna in northwest Poland.[2]
References
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Coastal geography
- Anchialine pool
- Archipelago
- Atoll
- Avulsion
- Ayre
- Barrier island
- Bay
- Bight
- Bodden
- Brackish marsh
- Cape
- Channel
- Cliff
- Coast
- Coastal plain
- Coastal waterfall
- Continental margin
- Continental shelf
- Coral reef
- Cove
- Dune
- Estuary
- Firth
- Fjard
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- Freshwater marsh
- Fundus
- Gat
- Geo
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- Hapua
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- Inlet
- Intertidal wetland
- Island
- Islet
- Isthmus
- Lagoon
- Machair
- Mudflat
- Natural arch
- Peninsula
- Reef
- Ria
- Salt marsh
- Shoal
- Shore
- Skerry
- Sound
- Spit
- Stack
- Strait
- Strand plain
- Submarine canyon
- Tidal island
- Tidal marsh
- Tide pool
- Tied island
- Tombolo
- Waituna
- Windwatt
- Debouch
- River delta
- mega
- regressive
- Mouth bar
- Blowhole
- Cliffed coast
- Coastal biogeomorphology
- Coastal erosion
- Concordant coastline
- Current
- Cuspate foreland
- Discordant coastline
- Emergent coastline
- Feeder bluff
- Fetch
- Flat coast
- Graded shoreline
- Ingression coast
- Large-scale coastal behaviour
- Longshore drift
- Marine regression
- Marine transgression
- Raised shoreline
- Rip current
- Rocky shore
- Sea cave
- Sea foam
- Shoal (Peresyp)
- Steep coast
- Submergent coastline
- Surf break
- Surf zone
- Surge channel
- Swash
- Undertow
- Volcanic arc
- Wave-cut platform
- Wave shoaling
- Wind wave
- Accretion
- Coastal management
- Integrated coastal zone management
- Submersion
- Category