An inlet is a typically long and narrow indentation of a

shoreline A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...

such as a small

arm In human anatomy, the arm refers to the upper limb in common usage, although academically the term specifically means the upper arm between the glenohumeral joint (shoulder joint) and the elbow joint. The distal part of the upper limb between ...

cove A cove is a small bay or coastal inlet. They usually have narrow, restricted entrances, are often circular or oval, and are often situated within a larger bay. Small, narrow, sheltered bays, inlets, creek (tidal), creeks, or recesses in a coast ...

bay A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a ''gulf'', ''sea'', ''sound'', or ''bight''. A ''cove'' is a small, ci ...

sound In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the ''reception'' of such waves and their ''perception'' by the br ...

fjord In physical geography, a fjord (also spelled fiord in New Zealand English; ) is a long, narrow sea inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Antarctica, the Arctic, and surrounding landmasses of the n ...

lagoon A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'') an ...

marsh In ecology, a marsh is a wetland that is dominated by herbaceous plants rather than by woody plants.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p More in genera ...

, that leads to an enclosed larger

body of water A body of water or waterbody is any significant accumulation of water on the surface of Earth or another planet. The term most often refers to oceans, seas, and lakes, but it includes smaller pools of water such as ponds, wetlands, or more rare ...

such as a

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime enviro ...

gulf A gulf is a large inlet from an ocean or their seas into a landmass, larger and typically (though not always) with a narrower opening than a bay (geography), bay. The term was used traditionally for large, highly indented navigable bodies of s ...

marginal sea This is a list of seas of the World Ocean, including marginal seas, areas of water, various gulfs, bights, bays, and straits. In many cases it is a matter of tradition for a body of water to be named a sea or a bay, etc., therefore all these ...

Overview

marine geography Oceanography (), also known as oceanology, sea science, ocean science, and marine science, is the scientific study of the ocean, including its physics, chemistry, biology, and geology. It is an Earth science, which covers a wide range of top ...

, the term "inlet" usually refers to either the actual

channel Channel, channels, channeling, etc., may refer to: Geography * Channel (geography), a landform consisting of the outline (banks) of the path of a narrow body of water. Australia * Channel Country, region of outback Australia in Queensland and pa ...

between an

enclosed bay A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a Gulf (geography), ''gulf'', ''sea'', sound (geography), ''sound'', or bi ...

and the

open ocean The pelagic zone consists of the water column of the open ocean and can be further divided into regions by depth. The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the surfa ...

and is often called an "entrance", or a significant recession in the shore of a sea, lake or large river. A certain kind of inlet created by past

glaciation A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate be ...

is a

, typically but not always in mountainous coastlines and also in

montane Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures lapse rate, fall as elevation increases, causing the ecosystem to stratify. This stratification is ...

lakes. Multi-arm complexes of large inlets or

s may be called

s, e.g.,

Puget Sound Puget Sound ( ; ) is a complex estuary, estuarine system of interconnected Marine habitat, marine waterways and basins located on the northwest coast of the U.S. state of Washington (state), Washington. As a part of the Salish Sea, the sound ...

Howe Sound Howe Sound (, ) is a roughly triangular sound (geography), sound, that joins a network of fjords situated immediately northwest of Vancouver, British Columbia, Canada. It was designated as a UNESCO Biosphere Reserve in 2021. Geography Howe Sound ...

Karmsund Karmsund is a strait located in Rogaland county, Norway. The long strait separates the island of Karmøy on the west and the mainland of Norway and island of Vestre Bokn in the east. The strait runs through the municipalities of Haugesund, ...

(''sund'' is Scandinavian for "sound"). Some fjord-type inlets are called

canal Canals or artificial waterways are waterways or engineered channels built for drainage management (e.g. flood control and irrigation) or for conveyancing water transport vehicles (e.g. water taxi). They carry free, calm surface ...

s, e.g.,

Portland Canal Portland Canal is an arm of Portland Inlet, one of the principal inlets of the British Columbia Coast. It is approximately long. The Portland Canal forms part of the border between southeastern Alaska and British Columbia. The name of the enti ...

Lynn Canal Lynn Canal is an inlet (not an artificial canal) into the mainland of southeast Alaska. Lynn Canal runs about from the inlets of the Chilkat River south to Chatham Strait and Stephens Passage. At over in depth, Lynn Canal is the deepest fjor ...

Hood Canal Hood Canal is a fjord-like body of water that lies south of Admiralty Inlet in Washington State that some consider to be the western lobe and one of the five main basins of Puget Sound.Dean Channel Dean Channel is the upper end of one of the longest inlets of the British Columbia Coast, from its head at the mouth of the Kimsquit River. The Dean River, one of the main rivers of the Coast Mountains, enters Dean Channel about below the hea ...

and

Douglas Channel Douglas Channel is one of the principal inlets (or fjords) of the British Columbia Coast, into which the Kitimat River flows. The channel was named in honour of Sir James Douglas, the first governor of the Colony of British Columbia. The offici ...

. Tidal amplitude, wave intensity, and wave direction are all factors that influence sediment flux in inlets. On low slope sandy coastlines, inlets often separate

barrier islands Barrier islands are a coastal landform, a type of dune system and sand island, where an area of sand has been formed by wave and tidal action parallel to the mainland coast. They usually occur in chains, consisting of anything from a few is ...

and can form as the result of storm events. Alongshore sediment transport can cause inlets to close if the action of

tidal currents Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables c ...

flowing through an inlet do not flush accumulated sediment out of the inlet.

Notes

References

External links

Coastal Inlets Research Program
{{coastal geography Coastal and oceanic landforms Bodies of water

Overview

See also

Notes

References

External links