Coastal systems are influenced by wave action and erosion. There are two types of coasts - primary formed by erosion and deposition and secondary formed by marine action. Waves are formed by wind pushing water in circular orbits, becoming elliptical and steeper as they approach land, eventually breaking. Wave size is influenced by duration, velocity and distance of wind over water. Destructive waves are short and high while constructive waves are long and low. Wave erosion occurs on steep slopes and soft rocks while deposition happens on gentle slopes. Coastal landforms result from these processes, including headlands and bays formed by differences in rock resistance.
The coast is the zone where land meets the sea and is constantly changing due to land, marine, and air processes. Waves are created by wind blowing over water, transferring energy. Wave size depends on wind strength and duration (fetch). Destructive waves occur in storms with high energy from long fetches, eroding coasts, while constructive waves in calm weather deposit material and build beaches. Waves break when slowed in shallow water, becoming too steep.
Waves erode, transport, and deposit sediments along shorelines, forming features like beaches and barrier islands. Wave refraction causes waves to bend and concentrate energy against headlands and shores, while weakening in bays. Longshore currents flow parallel to shore and are driven by waves, moving sediments such as sand and gravel along the coast. Shoreline features are either erosional, formed by erosion, or depositional, formed by sediment deposition in low-energy areas. Structures like groins, breakwaters, and seawalls can protect shorelines from erosion. Beach nourishment involves adding large amounts of sand to beaches.
This document provides an overview of coastal environments and processes. It defines coastal zones and features such as the littoral zone, beach, foreshore, and backshore. It describes factors that influence coastal areas like lithology, geological structures, processes, sea level changes and human impacts. Coastal processes discussed include waves, tides, storm surges, wave refraction, and marine erosion. The summary discusses key coastal landforms and how they are formed by coastal processes.
Coastal processes involve the dynamic interaction between land and sea that causes erosion and deposition along coastlines. Key coastal processes driven by tides, waves, winds, and currents include sediment transport, erosion, deposition, and flooding. Understanding coastal processes is important for predicting environmental impacts, managing habitats and development in coastal zones, and implementing coastal protection. Coastal scientists study these complex nearshore systems and sediment dynamics to better understand coastal response to physical forces.
The coastline marks the meeting point between land and sea which is constantly changing due to erosion, transport and deposition processes driven by wave energy. Waves transfer energy from wind to water, changing shape as they reach shallow areas, and can both erode coastlines through processes like abrasion or build them up through deposition. Sediment is transported alongshore and across shorelines by processes like longshore drift, forming coastal features such as beaches, spits and bars. Coastal management uses various methods like sea walls, beach replenishment or groynes to protect shorelines from erosion.
The coast is the zone where land meets the sea and is constantly changing due to land, marine, and air processes. Waves are created by wind blowing over water, transferring energy. Wave size depends on wind strength and duration (fetch). Destructive waves occur in storms with high energy from long fetches, eroding coasts, while constructive waves in calm weather deposit material and build beaches. Waves break when slowed in shallow water, becoming too steep.
Waves erode, transport, and deposit sediments along shorelines, forming features like beaches and barrier islands. Wave refraction causes waves to bend and concentrate energy against headlands and shores, while weakening in bays. Longshore currents flow parallel to shore and are driven by waves, moving sediments such as sand and gravel along the coast. Shoreline features are either erosional, formed by erosion, or depositional, formed by sediment deposition in low-energy areas. Structures like groins, breakwaters, and seawalls can protect shorelines from erosion. Beach nourishment involves adding large amounts of sand to beaches.
This document provides an overview of coastal environments and processes. It defines coastal zones and features such as the littoral zone, beach, foreshore, and backshore. It describes factors that influence coastal areas like lithology, geological structures, processes, sea level changes and human impacts. Coastal processes discussed include waves, tides, storm surges, wave refraction, and marine erosion. The summary discusses key coastal landforms and how they are formed by coastal processes.
Coastal processes involve the dynamic interaction between land and sea that causes erosion and deposition along coastlines. Key coastal processes driven by tides, waves, winds, and currents include sediment transport, erosion, deposition, and flooding. Understanding coastal processes is important for predicting environmental impacts, managing habitats and development in coastal zones, and implementing coastal protection. Coastal scientists study these complex nearshore systems and sediment dynamics to better understand coastal response to physical forces.
The coastline marks the meeting point between land and sea which is constantly changing due to erosion, transport and deposition processes driven by wave energy. Waves transfer energy from wind to water, changing shape as they reach shallow areas, and can both erode coastlines through processes like abrasion or build them up through deposition. Sediment is transported alongshore and across shorelines by processes like longshore drift, forming coastal features such as beaches, spits and bars. Coastal management uses various methods like sea walls, beach replenishment or groynes to protect shorelines from erosion.
1. The document defines coastal terminology like shore, backshore, foreshore, offshore, as well as wave terminology like crest, trough, wavelength, wave height, and wave period.
2. It explains how waves are formed by wind and the parts of a wave including crest, trough, wavelength, and wave height.
3. The coast is described as a complex open system where landforms are shaped by energy from wind-generated waves interacting with surface materials, and coastal characteristics vary based on influencing factors like human activities and geology.
This document summarizes various coastal processes including waves, currents, tides, sea level changes, erosion, deposition, and landforms. It describes how waves, currents, and tides shape shorelines through erosion, transportation, and deposition of sediments. Key coastal landforms are discussed like spits, barrier islands, deltas, cliffs, wave-cut platforms, sea caves, sea arches, and sea stacks that form through these coastal processes. Biological activity and rising sea levels also impact coastal evolution over time.
Coastlines are formed through erosion and sediment deposition processes. They are shaped by sea level changes and the interaction between land and ocean. A coastline includes beaches, cliffs, and other landforms at the boundary between land and sea. Coastal zones experience continuous change from tidal movements and ocean interactions with the shore. Erosional landforms like sea cliffs and arches form through destructive wave energy, while depositional landforms like beaches and barrier islands are built up from sediment deposition.
A sediment cell is a stretch of coastline where sediment is sourced from coastal erosion, transported via longshore drift and tidal currents, and ultimately deposited in sinks like beaches and bars. The cell receives sediment inputs from eroding cliffs and deposits within the cell as well as from rivers. Sediment is transported along the coastline before being trapped in depositional features, effectively removing it from circulation. Human activities like seawalls can disrupt sediment movement within a cell, causing erosion issues down drift.
The coast is a narrow contact zone between land and sea that is constantly changing due to various land, air, and marine processes. Waves are a major force shaping the coastline, with characteristics like height, period, length, and steepness influencing their constructive or destructive power. Coastal landforms like beaches, sand dunes, spits, bars, cliffs, and caves form through the interacting processes of erosion, sediment transport, and deposition that waves and currents bring about.
This document summarizes key concepts in coastal geomorphology. It discusses ocean water properties like salinity, temperature, and density which vary based on location. It also describes ocean currents and how they transport heat. Tides are explained as being caused by gravitational pull from the moon and sun. Extreme tides can form landforms. Waves are generated by wind and their characteristics depend on fetch and strength. Waves transform and transport sediment along shorelines via processes like refraction and longshore drift. Erosional and depositional coastal environments are shaped by these processes. Finally, human impacts like stabilization structures are discussed.
A2 Geography Revision for Coastal Environments, subchapter 8.1 Waves Marine and Subaerial Processes. It is suitable for Year 13 Geography, Cambridge Examination in November 2016. It contains: key terms and definitions, a topic summary, sketches and descriptions, additional work (6 questions for testing your knowledge) and some suggested websites.
The document discusses coastal environments and the processes that impact coastlines. It describes coasts as zones where land and sea interact and are influenced by terrestrial, human, marine and atmospheric factors. Coasts experience rapid change from both short-term processes like storms and long-term processes like sea level rise. Over half the world's population lives near coasts, putting increasing pressure on coastal resources and ecosystems. Coastal management is important given human development and climate change impacts. The document outlines different coastal zone types and diagrams the factors affecting coasts.
Coastal erosion is the wearing away of land and removal of beach sediments by waves, currents, and drainage. Natural forces like wind, waves and currents shape coastal regions by moving land materials. Coastal erosion is the landward displacement of the shoreline caused by these forces. Factors influencing erosion include waves, currents, tides, wind, sand sources and sinks, sea level changes, coastal geomorphology, and human activities like construction and dredging. Coastal erosion can cause loss of land and property damage from landslides. Rates of erosion vary in different locations based on slope, wave intensity, wind, and shoreline characteristics.
GEOGRAPHY YEAR 10: COASTAL PROCESSES. Types of waves, the power of waves, the size and energy of waves, destructive and constructive waves, hydraulic action, abrasion, attrition, solution, sources of material in the sea, swash and transportation, coastal transportation, coastal deposition.
This lesson aims to teach students about different types of waves and how they impact coastlines. By the end, students should be able to name two types of waves, describe their differences, and explain how each type changes coastlines. Constructive waves are low in height and length with few occurrences per minute, depositing sediment to build wide, flat beaches. Destructive waves are high, short, and frequent, eroding steep beaches by pulling sediment offshore.
The document summarizes coastal processes and features. It discusses how waves erode, transport, and deposit material, shaping coastlines. Coastal landforms like cliffs, headlands, bays, beaches, and sand dunes are formed through erosion or deposition. Coastal management considers both human uses of coasts and techniques to address physical processes like erosion.
The document summarizes the formation and types of coastlines. It defines a coastline as the boundary where land meets the sea. Coastlines are formed through the erosion and deposition actions of waves, tides, currents and other marine processes on sediments and rocks. Major coastal landforms include beaches formed from sediment deposition, as well as erosional features like sea cliffs, wave-cut platforms, sea stacks and sea arches formed through wave erosion. Coastlines are classified based on their dominant formation processes into primary coastlines formed through terrestrial processes and secondary coastlines formed through marine erosion and deposition.
This document discusses coastal landforms and processes. It explains that waves are formed through friction between the wind and sea surface. As waves approach shorelines, they either build beaches through deposition or erode the coastline. Constructive waves deposit material to form features like beaches, while destructive waves remove material. Coastal features include erosional landforms created by erosion and depositional landforms created by sediment deposition. Examples of depositional features are beaches, spits, tombolos, and bars that form where sediment is deposited by waves or rivers entering the sea.
The document discusses various shoreline processes driven by wave motion. It explains that waves form as energy moves through water, with water particles moving in a circular pattern. As waves approach shallow water, they break due to friction, piling up water that rushes onto the shore and moves sediment. Waves typically approach the shore at an angle and carry sediment along the coast in a zig-zag pattern through longshore transport. Breaking waves can also transport sediment diagonally inland during swash before the sediment moves seaward during backwash.
The document discusses different classifications of coastlines based on geology and energy levels. There are three main types of coastlines: transverse coasts which develop when rock strata is perpendicular to the shoreline; longitudinal/concordant coasts which develop when rock strata runs parallel to the shoreline; and coastlines classified by energy levels including high energy, low energy, and protected coastlines based on wave activity. Geology is the overriding factor in coastal morphology, with rock type and structure influencing coastal landforms.
Coastal systems can be divided into erosional shorelines and depositional shorelines based on dominant long-term processes. Erosional shorelines are dominated by erosive forces and typically have high-relief rocky coasts, while depositional shorelines are dominated by depositional processes and include environments like deltas, barrier islands, and reef coasts. Coasts experience various erosive and depositional processes from waves, such as refraction, longshore drift, and swash/backwash, which shape the shoreline over time. Stabilizing eroding coasts involves hard structures, beach nourishment, or relocation, but these approaches have limitations and tradeoffs.
Natural Disasters Topic 8 (Drainage Basins & Rivers)William W. Little
The document summarizes key aspects of river systems and their transport of sediment. It describes how rivers transition from steep mountain headwaters to flatter plains, carrying sediment in various modes of transport. It also discusses characteristics of meandering and braided rivers, and how river channels migrate and deposit sediment in point bars and during floods. The document concludes by outlining features that form as rivers enter standing bodies of water, such as deltas, alluvial fans, and fan-deltas.
Every continent or island is bordered by a long or short coastline. Coastline is the line separating the land and sea. Coastal zones are the transition zones between terrestrial and marine habitat. They form an interface between land and oceanic natural processes. Coastal areas also are varied in their topography, climate and vegetation. Some are sandy beaches, rocky shores, with or without tidal inlets. The climate of a coast are controlled by the land and sea breezes and the humidity controlled by marine water. Waves are powerful tools for constructive and destructive activities. Hence. the geomorphology of beach, materials and processes are always not constant due to the impact of everlasting action of tides, waves and currents.
This document discusses various coastal landforms formed by erosion processes. It describes attrition as the breaking down of material into smaller particles when carried by waves. Corrasion and hydraulic action involve material carried by waves wearing away coastlines through impacts or air pressure within cracks. Solution slowly dissolves rocks through chemical reactions with acid in seawater. Headlands project out and are more resistant to erosion, forming bays between them. Cliffs and wave-cut platforms are formed as waves erode the cliff base and notch it, eventually leaving a platform when the cliff collapses. Caves, arches, stacks and stumps form through the continued erosion of weaknesses in the cliff and eventual collapse of eroded sections.
Coastal zones are dynamic environments where erosion, transportation, and deposition occur due to forces like waves, tides, currents, and sea level rise. Erosion breaks down land, transportation moves eroded materials elsewhere, and deposition occurs when materials are dropped off. Coastal features include beaches, cliffs, stacks, arches, and dunes, which are shaped by these processes. Weathering and erosion also influence coasts; weathering breaks down rock material without moving it while erosion physically moves material. Physical and chemical weathering break down rocks through freeze-thaw cycling, exfoliation, oxidation, and carbonation.
Coastal processes shape coastal landscapes through erosion, deposition, and transportation of materials. Waves, wind, and tides are the main drivers of coastal processes, with waves providing over half the energy. Coastal processes form landforms like dunes, beaches, and barrier islands within 5 km of the coast through erosion of some areas and building up of sediments in others. Constructive waves deposit materials while destructive waves erode coastlines. Tides and wave types affect whether coastal areas experience erosion or deposition.
1. The document defines coastal terminology like shore, backshore, foreshore, offshore, as well as wave terminology like crest, trough, wavelength, wave height, and wave period.
2. It explains how waves are formed by wind and the parts of a wave including crest, trough, wavelength, and wave height.
3. The coast is described as a complex open system where landforms are shaped by energy from wind-generated waves interacting with surface materials, and coastal characteristics vary based on influencing factors like human activities and geology.
This document summarizes various coastal processes including waves, currents, tides, sea level changes, erosion, deposition, and landforms. It describes how waves, currents, and tides shape shorelines through erosion, transportation, and deposition of sediments. Key coastal landforms are discussed like spits, barrier islands, deltas, cliffs, wave-cut platforms, sea caves, sea arches, and sea stacks that form through these coastal processes. Biological activity and rising sea levels also impact coastal evolution over time.
Coastlines are formed through erosion and sediment deposition processes. They are shaped by sea level changes and the interaction between land and ocean. A coastline includes beaches, cliffs, and other landforms at the boundary between land and sea. Coastal zones experience continuous change from tidal movements and ocean interactions with the shore. Erosional landforms like sea cliffs and arches form through destructive wave energy, while depositional landforms like beaches and barrier islands are built up from sediment deposition.
A sediment cell is a stretch of coastline where sediment is sourced from coastal erosion, transported via longshore drift and tidal currents, and ultimately deposited in sinks like beaches and bars. The cell receives sediment inputs from eroding cliffs and deposits within the cell as well as from rivers. Sediment is transported along the coastline before being trapped in depositional features, effectively removing it from circulation. Human activities like seawalls can disrupt sediment movement within a cell, causing erosion issues down drift.
The coast is a narrow contact zone between land and sea that is constantly changing due to various land, air, and marine processes. Waves are a major force shaping the coastline, with characteristics like height, period, length, and steepness influencing their constructive or destructive power. Coastal landforms like beaches, sand dunes, spits, bars, cliffs, and caves form through the interacting processes of erosion, sediment transport, and deposition that waves and currents bring about.
This document summarizes key concepts in coastal geomorphology. It discusses ocean water properties like salinity, temperature, and density which vary based on location. It also describes ocean currents and how they transport heat. Tides are explained as being caused by gravitational pull from the moon and sun. Extreme tides can form landforms. Waves are generated by wind and their characteristics depend on fetch and strength. Waves transform and transport sediment along shorelines via processes like refraction and longshore drift. Erosional and depositional coastal environments are shaped by these processes. Finally, human impacts like stabilization structures are discussed.
A2 Geography Revision for Coastal Environments, subchapter 8.1 Waves Marine and Subaerial Processes. It is suitable for Year 13 Geography, Cambridge Examination in November 2016. It contains: key terms and definitions, a topic summary, sketches and descriptions, additional work (6 questions for testing your knowledge) and some suggested websites.
The document discusses coastal environments and the processes that impact coastlines. It describes coasts as zones where land and sea interact and are influenced by terrestrial, human, marine and atmospheric factors. Coasts experience rapid change from both short-term processes like storms and long-term processes like sea level rise. Over half the world's population lives near coasts, putting increasing pressure on coastal resources and ecosystems. Coastal management is important given human development and climate change impacts. The document outlines different coastal zone types and diagrams the factors affecting coasts.
Coastal erosion is the wearing away of land and removal of beach sediments by waves, currents, and drainage. Natural forces like wind, waves and currents shape coastal regions by moving land materials. Coastal erosion is the landward displacement of the shoreline caused by these forces. Factors influencing erosion include waves, currents, tides, wind, sand sources and sinks, sea level changes, coastal geomorphology, and human activities like construction and dredging. Coastal erosion can cause loss of land and property damage from landslides. Rates of erosion vary in different locations based on slope, wave intensity, wind, and shoreline characteristics.
GEOGRAPHY YEAR 10: COASTAL PROCESSES. Types of waves, the power of waves, the size and energy of waves, destructive and constructive waves, hydraulic action, abrasion, attrition, solution, sources of material in the sea, swash and transportation, coastal transportation, coastal deposition.
This lesson aims to teach students about different types of waves and how they impact coastlines. By the end, students should be able to name two types of waves, describe their differences, and explain how each type changes coastlines. Constructive waves are low in height and length with few occurrences per minute, depositing sediment to build wide, flat beaches. Destructive waves are high, short, and frequent, eroding steep beaches by pulling sediment offshore.
The document summarizes coastal processes and features. It discusses how waves erode, transport, and deposit material, shaping coastlines. Coastal landforms like cliffs, headlands, bays, beaches, and sand dunes are formed through erosion or deposition. Coastal management considers both human uses of coasts and techniques to address physical processes like erosion.
The document summarizes the formation and types of coastlines. It defines a coastline as the boundary where land meets the sea. Coastlines are formed through the erosion and deposition actions of waves, tides, currents and other marine processes on sediments and rocks. Major coastal landforms include beaches formed from sediment deposition, as well as erosional features like sea cliffs, wave-cut platforms, sea stacks and sea arches formed through wave erosion. Coastlines are classified based on their dominant formation processes into primary coastlines formed through terrestrial processes and secondary coastlines formed through marine erosion and deposition.
This document discusses coastal landforms and processes. It explains that waves are formed through friction between the wind and sea surface. As waves approach shorelines, they either build beaches through deposition or erode the coastline. Constructive waves deposit material to form features like beaches, while destructive waves remove material. Coastal features include erosional landforms created by erosion and depositional landforms created by sediment deposition. Examples of depositional features are beaches, spits, tombolos, and bars that form where sediment is deposited by waves or rivers entering the sea.
The document discusses various shoreline processes driven by wave motion. It explains that waves form as energy moves through water, with water particles moving in a circular pattern. As waves approach shallow water, they break due to friction, piling up water that rushes onto the shore and moves sediment. Waves typically approach the shore at an angle and carry sediment along the coast in a zig-zag pattern through longshore transport. Breaking waves can also transport sediment diagonally inland during swash before the sediment moves seaward during backwash.
The document discusses different classifications of coastlines based on geology and energy levels. There are three main types of coastlines: transverse coasts which develop when rock strata is perpendicular to the shoreline; longitudinal/concordant coasts which develop when rock strata runs parallel to the shoreline; and coastlines classified by energy levels including high energy, low energy, and protected coastlines based on wave activity. Geology is the overriding factor in coastal morphology, with rock type and structure influencing coastal landforms.
Coastal systems can be divided into erosional shorelines and depositional shorelines based on dominant long-term processes. Erosional shorelines are dominated by erosive forces and typically have high-relief rocky coasts, while depositional shorelines are dominated by depositional processes and include environments like deltas, barrier islands, and reef coasts. Coasts experience various erosive and depositional processes from waves, such as refraction, longshore drift, and swash/backwash, which shape the shoreline over time. Stabilizing eroding coasts involves hard structures, beach nourishment, or relocation, but these approaches have limitations and tradeoffs.
Natural Disasters Topic 8 (Drainage Basins & Rivers)William W. Little
The document summarizes key aspects of river systems and their transport of sediment. It describes how rivers transition from steep mountain headwaters to flatter plains, carrying sediment in various modes of transport. It also discusses characteristics of meandering and braided rivers, and how river channels migrate and deposit sediment in point bars and during floods. The document concludes by outlining features that form as rivers enter standing bodies of water, such as deltas, alluvial fans, and fan-deltas.
Every continent or island is bordered by a long or short coastline. Coastline is the line separating the land and sea. Coastal zones are the transition zones between terrestrial and marine habitat. They form an interface between land and oceanic natural processes. Coastal areas also are varied in their topography, climate and vegetation. Some are sandy beaches, rocky shores, with or without tidal inlets. The climate of a coast are controlled by the land and sea breezes and the humidity controlled by marine water. Waves are powerful tools for constructive and destructive activities. Hence. the geomorphology of beach, materials and processes are always not constant due to the impact of everlasting action of tides, waves and currents.
This document discusses various coastal landforms formed by erosion processes. It describes attrition as the breaking down of material into smaller particles when carried by waves. Corrasion and hydraulic action involve material carried by waves wearing away coastlines through impacts or air pressure within cracks. Solution slowly dissolves rocks through chemical reactions with acid in seawater. Headlands project out and are more resistant to erosion, forming bays between them. Cliffs and wave-cut platforms are formed as waves erode the cliff base and notch it, eventually leaving a platform when the cliff collapses. Caves, arches, stacks and stumps form through the continued erosion of weaknesses in the cliff and eventual collapse of eroded sections.
Coastal zones are dynamic environments where erosion, transportation, and deposition occur due to forces like waves, tides, currents, and sea level rise. Erosion breaks down land, transportation moves eroded materials elsewhere, and deposition occurs when materials are dropped off. Coastal features include beaches, cliffs, stacks, arches, and dunes, which are shaped by these processes. Weathering and erosion also influence coasts; weathering breaks down rock material without moving it while erosion physically moves material. Physical and chemical weathering break down rocks through freeze-thaw cycling, exfoliation, oxidation, and carbonation.
Coastal processes shape coastal landscapes through erosion, deposition, and transportation of materials. Waves, wind, and tides are the main drivers of coastal processes, with waves providing over half the energy. Coastal processes form landforms like dunes, beaches, and barrier islands within 5 km of the coast through erosion of some areas and building up of sediments in others. Constructive waves deposit materials while destructive waves erode coastlines. Tides and wave types affect whether coastal areas experience erosion or deposition.
Coastal erosion is the wearing away of land and the displacement of the shoreline caused by natural forces like waves, winds, and tides. It can also be exacerbated by human activities. The document outlines various natural causes of coastal erosion like wave action, winds, tides, storms, and sea level rise, as well as human causes like construction and dredging. Factors that influence erosion rates include sediment sources and sinks, changes in sea level, and coastal geomorphology. Coastal erosion shapes coastlines slowly over time but can also occur catastrophically during storms or tsunamis.
Coastal erosion is the wearing away of land and removal of beach sediments by wave action, tidal currents, and other processes. Coasts are classified as primary, shaped by land erosion, or secondary, shaped by marine agents. Erosional coasts experience active erosion while depositional coasts experience sediment accumulation from rivers or oceans. Waves, tides, currents, and coastal dynamics shape shorelines through erosion, transportation, and deposition, forming landforms like sea stacks, arches, caves, spits, barrier islands, and deltas. The rate of coastal destruction varies depending on slope, wave intensity, wind, and human activities and can damage habitats.
This document discusses coastal erosion and mechanisms. It defines coastal terminology and describes the various agents that affect coastal erosion, including wind, waves, tides, and currents. It also examines the erosional and depositional landforms created by coastal processes, such as headlands, sea stacks, beaches, and barrier islands. Additionally, it covers the concepts of coastal erosion, longshore drift, and coastal deposition. The effects of coastal erosion are also addressed, as well as the importance of understanding coastal dynamics and implementing mitigation strategies to reduce erosion.
The document defines key coastal landforms and zones. It classifies Bangladesh's coast into 3 regions - eastern, central, and western - based on geomorphology, sediment composition, and economic activities. The central zone has high sediment deposition from river systems. The western zone has stable mangrove forests. Coasts can also be classified based on factors like river discharge, wave/tide forces, and sediment type. Sea level rise is caused by thermal expansion and melting ice, and impacts coasts through saltwater intrusion, wetland and agricultural land loss, and threats to fisheries and food security.
The document discusses coastal landforms and the processes involved in their formation. It covers both erosional and depositional coastal features. Erosional features like cliffs, arches and stacks are formed by processes like wave action, weathering and erosion concentrating on headlands. Depositional features such as beaches, spits and bars are produced by constructive waves depositing sediment transported by longshore drift. The key forces shaping the coast are waves, tides, currents and the underlying geology of the area.
The document discusses coastal landforms and the processes that create them. It describes how waves, tides, and currents shape the coastal environment and lead to both erosional and depositional landforms. Erosional features include cliffs, headlands, sea caves, and stacks, which are formed by processes like abrasion and hydraulic action. Depositional landforms include beaches, bars, spits, and barrier islands, which are produced when sediment is transported and deposited by waves, currents, and biological activity.
The document defines coasts as the area where land meets the sea, and explains that coasts are important habitats and home to most of the world's population. Coasts are dynamic systems that are constantly changing due to coastal processes like waves and tides, which erode, transport, and deposit material, affecting both the environment and people living in coastal areas. The document will study waves, coastal processes and how they form landforms, coastal management, and possibly coral reefs.
This document discusses marginal marine depositional environments including deltas, beaches, barrier island systems, and estuaries. Deltas form where rivers enter standing bodies of water, depositing topset, foreset, and bottomset beds. Beaches have foreshores, backshores, and berms that change with seasons. Barrier islands are long and narrow, separated from the mainland by lagoons. Estuaries are coastal waters where rivers meet the sea, and can be wave-dominated or tide-dominated based on wave and tidal energy influences on sediment transport.
The document summarizes coastal geomorphology and processes. It describes how marine processes like waves, along with sub-aerial processes and human activities, shape the coastline over time. Constructive waves build up sediment while destructive waves erode coasts. Coastal erosion occurs through abrasion, hydraulic pressure, corrosion, and sub-aerial processes like weathering and mass movement. The type and rate of erosion depends on factors like wave energy, beach material, and rock type. Material is transported along the coast through swash and backwash of waves.
The document summarizes how oceans shape our lives by discussing the distribution of water on Earth, properties of ocean water, ocean motions, shoreline formations, and the barrier islands of North Carolina's Outer Banks. It explains that barrier islands formed due to rising sea levels, a large sand supply, a gently sloping coast, and wave energy. Humans are increasing the rate of barrier island migration through armoring and development, which reduces available sand and increases erosion risks. Ultimately, one cannot have buildings and beaches in the long run due to the dynamic coastal environment.
Chapter 1 introduction to coastal engineering and management strategiesMohsin Siddique
This document provides an overview of coastal engineering and beach processes. It begins with an introduction to coastal engineering and management. It then discusses coastal zone terminology and beach profile terminology. The key processes in the nearshore zone are described, including wave shoaling, breaking, refraction, diffraction, longshore and rip currents. The key components of beaches and how they respond dynamically to sea forces like waves, tides, currents, and storms are also summarized.
This document discusses various coastal landforms and processes. It begins with defining terms related to waves and wave action. It then explains processes of marine erosion and how they can shape cliff coastlines and form wave-cut platforms. It describes how waves can transport and deposit sediment. Landforms like spits, bars, and salt marshes are discussed along with their formation. Finally, it covers coral reef types and theories about their formation, and how sea level changes can impact coral reefs.
Coasts are shaped by the dynamic forces of the sea, air, and waves. Waves erode coastlines through hydraulic action, abrasion, attrition, and corrosion. Erosion carves out coastal landforms like cliffs, headlands, and bays. Waves also transport and deposit eroded material, building up beaches and forming depositional landforms such as spits, bars, and sand dunes. Managing coastal change involves either "hard engineering" using structures, or "soft engineering" techniques like beach nourishment and managed retreat that work with natural coastal processes.
Coasts can be classified as primary or secondary based on tectonic position and sea level changes. Primary coasts are young and shaped by land-based processes, while secondary coasts are older and influenced by marine processes like waves, currents, and wind. Secondary coasts feature beaches, coastal landforms created by wave and current activity like barrier islands and cliffs, and depositional landforms like deltas formed at river mouths.
Beaches have three main components - the nearshore, foreshore, and backshore. The nearshore extends seaward of the shoreline and contains sand bars formed by sediment deposition as wave energy is lost. The foreshore is the area between low and high tide marks affected daily by swash and backwash, depositing and returning sediment. The backshore lies beyond the foreshore and contains dunes, with sediment transported there during storms. Key beach features include berms, ridges and runnels, cusps, spits, and bars, formed by processes like deposition, swash action, and longshore drift.
Coastal erosion is a natural process that shapes shorelines through the wearing away of coastal land and beaches by the impact of waves. It involves the redistribution of sediments by waves, currents, tides, wind, and water. Coastal erosion is exacerbated by both natural processes like storms and sea level rise, as well as human activities such as coastal development and sand mining. This can lead to property damage, loss of tourism, harm to infrastructure and the environment, and the destruction of historical landmarks. Preventing and managing coastal erosion requires careful land use planning, limiting development in high-risk areas, and using structural measures selectively.
The document discusses coastal systems and their components, processes, and landforms. It describes how oceans are composed of salts dissolved in water and atmospheric gases. Coastal systems are influenced by solar energy, winds, tides, waves, and longshore currents which cause erosion, sediment transport, and deposition. This shapes various coastal landforms like wave-cut platforms, beaches, barrier islands, and reefs. It also describes biological factors like coral reefs and coastal wetlands that provide habitat but are threatened by climate change and development.
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
বাংলাদেশের অর্থনৈতিক সমীক্ষা ২০২৪ [Bangladesh Economic Review 2024 Bangla.pdf] কম্পিউটার , ট্যাব ও স্মার্ট ফোন ভার্সন সহ সম্পূর্ণ বাংলা ই-বুক বা pdf বই " সুচিপত্র ...বুকমার্ক মেনু 🔖 ও হাইপার লিংক মেনু 📝👆 যুক্ত ..
আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
তাই একজন নাগরিক হিসাবে এই তথ্য গুলো আপনার জানা প্রয়োজন ...।
বিসিএস ও ব্যাংক এর লিখিত পরীক্ষা ...+এছাড়া মাধ্যমিক ও উচ্চমাধ্যমিকের স্টুডেন্টদের জন্য অনেক কাজে আসবে ...
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
How to Fix the Import Error in the Odoo 17Celine George
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
3. Factors Governing the Work of Waves and the Character of Coastal Landforms
● Types of wave action
→ waves that break against the land are associated with wave erosion.
→ waves which break before reaching the shore are associated with wave deposition
→ constructive and destructive waves
● Geology of Coastal Rocks
→ type of rocks
→ resistance of rocks to weathering and erosion
→ direction of dipping of the rock strata
→ presence, absence and arrangement of lines of weakness (e.g. joints, fissures, faults)
● Relief of coastal slope
→ steep coastal slope is associated with wave erosion because waves, especially those driven
by strong winds over long fetch, reach the coast in deep water and break against the land or cliff
side
→ Gentle coastal slope is associated with wave deposition as waves are retarded by friction with
the bottom of the slope in shallow waters. The waves tend to break before reaching the coast
● Orientation of the coast
→ The position of the coast in contrast to open sea or ocean determines whether the coast is
exposed to oncoming winds that have blown over long fetch or not
→ the aspect of the coast in relation to strong prevailing winds determines whether the coast is
exposed to high energy waves
→ exposed coasts are more susceptible to wave erosion
→ sheltered casts are more favourable to wave deposition
● Relative changes in Sea level
→ may result either
a. from a rise of the mean sea level or submergence/sinking of the coastal land or
b. from a fall of the mean sea level or emergence/uplift of the coastal land
→ Effect of glaciation in coastal areas the drowning of glaciated valleys when sea level rises
→ Effects of Volcanic activity in Coastal Areas occurrence of tsunamis, in relation to volcanic
activity, increases rate of coastal erosion
→ Effects of coastal growth in coastal waters coral growth offshore tends to dissipate energy
before waves reach the coast, thus helping to protect the coastline.
→ human impact modifies the natural coastal landscape by activities like reclamation,
construction works, dredging, building typhoon shelters and groynes
The Work of Waves and Resulting Coastal Landforms
● Wave refraction is the bending of wave fronts as they approach a shore so as to break
almost parallel with the shore. In deep water, wave fronts are essentially parallel to one
another. As they approach the shallow waters of the shore, the retarding influence of
shallow water or frictional drag with the sea floor, causes the waves to slow down and
the wave fronts to bend. Wave refraction occurs when:
→ along an irregular coast the retarding influence of shallow waters off the headlands before