What is wave dominated delta?

Wave-dominated deltas, such as the Nile Delta or the St. George lobe of the Danube Delta, are deltas where waves are the dominant factor shaping the fluvial sediment . Compared to tidal and river-dominated deltas, wave dominated deltas often have smooth coastlines, and few (~1) distributary channels (Fig.

What is a wave dominated barrier estuary?

A wave-dominated estuary represents a coastal bedrock embayment that has been partially infilled by sediment derived from both the catchment and marine sources, in which waves are the dominant force shaping the gross geomorphology.

What type of delta is tide-dominated?

Deltas which undergo strong tidal interaction are classified as tide-dominated deltas. As sediment travels out of the delta into the sea, high tides and flood tides confine sediment on the delta plain and low tides carry sediment seaward.

What is the main characteristic of a wave dominated river delta?

Wave-dominated deltas are characterised by relative high wave energy at the mouth compared to tide energy, and are distinguished from wave-dominated estuaries by high river energy. Total energy at the mouth is high because of high wave energy at the coast.

What is estuarine delta?

The term estuarine delta refers to subaqueous and subaerial deltaic deposits that have accumulated within the semiconfined and protected environment of an estuary. Estuarine deltas of the first type are best developed in macrotidal environments where bidirectional tidal currents redistribute river-derived sediments.

How is the delta formed give two examples of delta?

Deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river in smaller channels called distributaries. Examples of Deltas: The Mississippi Delta, Louisiana, The Nile, Egypt, Lough Leanne, Kerry. Step-by-step explanation: Hope this answer is helpful for you.

What is difference between Delta and estuary?

The estuary is an area where saltwater of sea mixes with fresh water of rivers. It is formed by a tidal bore. Delta is a low triangular area of alluvial deposits where a river divides before entering a larger body of water. It is the funnel-shaped mouth of a river where tides move in and out.

What is a barrier estuary?

Bar-built estuaries are characterized by barrier beaches or islands that form parallel to the coastline and separate the estuary from the ocean. Barrier beaches and islands are formed by the accumulation of sand or sediments deposited by ocean waves.

What is a tide-dominated estuary?

A tide-dominated estuary represents a bedrock coastal embayment that has been partially infilled by sediment derived from both the catchment and marine sources, in which tidal currents, rather than waves, are the dominant force shaping the gross geomorphology.

What is the difference between a tide-dominated delta and a tide-dominated estuary?

In contrast to tide-dominated estuaries where the flux convergence of suspended sediment tends to be located near the apex of the rivermouth embayment, the convergence in tide-dominated deltas is typically near the mouth of the embayment or slightly seaward (e.g. Fly, Ganges-Brahmaputra, Changjiang; Dalrymple and Choi …

What features form along a river dominated delta?

A river dominated delta, such as the map below of the Mississippi delta, Louisiana, USA, is sometimes called a bird’s foot delta because of its shape. Long, narrow mounds of sediment called levees build up along the sides of the narrow distributary channels. Wave dominated deltas look like a flattened triangle.

How is estuarine delta formed?

Estuarine deltas form as a river does not empty directly into the ocean, but instead forms an estuary. The Nile River forms an arcuate delta as it empties into the Mediterranean Sea. Stronger waves form a cuspate delta, which is more pointed than the arcuate delta, and is tooth-shaped.

Which is an example of a wave dominated delta?

Wave-dominated deltas, such as the Nile Delta or the St. George lobe of the Danube Delta, are deltas where waves are the dominant factor shaping the fluvial sediment. Compared to tidal and river-dominated deltas, wave dominated deltas often have smooth coastlines, and few (~1) distributary channels (Fig. 2).

Why are river deltas more sheltered from the waves?

Asymmetry is often manifested in the different delta sediments between the “updrift” delta flank facing the waves, and the “downdrift” delta flank that is more sheltered from the waves. Asymmetry around the river mouth can cause finer grained sediments to be trapped in the sheltered environment behind the river mouth bar.

Which is an example of a tide dominated estuaries?

Tide-dominated estuarine systems occur on coasts with strong semi-diurnal tides, see figure 2. These estuaries are characterised by a wide mouth; estuarine channels are narrowing inland. Examples are the Charente and the Hooghly estuaries. A mouth barrier is absent or reworked into a submarine ebb-tidal delta.

What happens to the diversity of estuarine morphologies?

This mutual interaction reduces the diversity of estuarine morphologies occurring in reality. For example, when a channel bed is scoured by strong currents, the channel depth increases, which entails a decrease of the current strength (negative feedback).