L19 Estuaries and Deltas

L19 Estuaries and Deltas - Geol 107 L19 10/7/2011 GULF OF...

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Geol 107±L19 10/7/2011 1 Deltas, Estuaries, and Lagoons GULF OF MEXICO MISSISSIPPI DELTA "BIRD'S-FOOT" DELTA NILE DELTA BANGLADESH MANGROVE SWAMPS (60%<5m above s.l.) GANGES- BRAHAMAPUTRA DELTA Deltas: the short answer A protuberance along a shoreline where a river enters a body of water Shaped like the Greek letter ȴ ²delta³ , delta Basically, a pile of sediment delivered to the coast by the river. Deltas: the long answer When sediment supply outstrips the ability of wave action to remove it, deltas develop Most deltas develop on passive margins with large rivers and large drainage areas Dl f b di h i h i Deltas form by extending the river mouth out into the coastal ocean and forming a series of distributory channels Delta fronts develop where sediment is deposited at the mouths of channels
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Geol 107±L19 10/7/2011 2 When river hits standing water, flow fans out and loses its carrying capacity sediments fall out
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This note was uploaded on 11/21/2011 for the course ECON 404 taught by Professor Carrillo during the Spring '11 term at USC.

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L19 Estuaries and Deltas - Geol 107 L19 10/7/2011 GULF OF...

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