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Understanding Coastal Landforms: Their Role in Shaping Coastal Landscapes

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Carlo

21/12/2025

Geography

EQ2: How do Characteristic Coastal Landforms contribute to Coastal Landscapes

162

21 Dec 2025

1 page

Understanding Coastal Landforms: Their Role in Shaping Coastal Landscapes

Coastal geography reveals how powerful waves constantly reshape our shorelines... Show more

Waves -
-waves are energy
moving through water.
- They are affected by:
-Wind Strength stronger fetch
- Wind duration=longer T fetch
- Water

Wave Energy and Coastal Processes

Wave energy determines whether coastlines experience erosion or build up new landforms. Waves gain their power from three key factors: wind strength, wind duration, and fetch (the distance wind travels over water).

Constructive waves are your beach-builders. They have low energy, arrive 6-9 times per minute, and create gentle beach gradients perfect for seaside holidays. Their strong swash (water flowing up the beach) carries sediment inland, whilst their weak backwash (water flowing down) leaves most material behind.

Destructive waves are the cliff-carvers. These high-energy waves crash ashore 11-15 times per minute with powerful backwash that drags sediment seaward. They create steep beach profiles and are responsible for dramatic coastal erosion.

Quick Tip: Remember constructive waves construct beaches, whilst destructive waves destroy cliffs!

Longshore drift moves sediment along coastlines when waves approach at an angle. The swash carries material diagonally up the beach, but gravity pulls the backwash straight down, creating a zigzag transport pattern that shapes our coasts over time.

Erosional Processes and Landforms

Four main erosional processes attack coastal rocks with relentless force. Hydraulic action compresses air into rock cracks, acting like a pneumatic drill. Abrasion occurs when waves hurl rocks against cliffs like natural hammers. Attrition gradually rounds pebbles as they collide with each other, whilst corrasion uses chemical reactions to dissolve vulnerable rocks like chalk.

These processes create spectacular erosional landforms. Wave-cut notches form at cliff bases, eventually creating overhangs that collapse and leave behind wave-cut platforms - those flat, rocky areas exposed at low tide.

Headlands and bays develop where resistant rocks stick out whilst softer rocks get carved into curved inlets. Over thousands of years, headlands can be sculpted into caves, then arches, stacks, and finally stumps as erosion continues its relentless work.

Remember: Erosional landforms follow a sequence - headland → cave → arch → stack → stump.

Subaerial processes also shape coasts through weathering (rock breakdown without movement) and mass movement (downslope movement including rockfalls, slumps, and flows).

Depositional Landforms and Transportation

When wave energy drops, deposition creates fascinating coastal features. Spits form when longshore drift deposits sediment across bay mouths, often developing curved ends where waves bend around them. If a spit connects an island to the mainland, it becomes a tombolo.

Beaches vary dramatically based on wave energy. Sandy beaches result from constructive waves on low-energy coasts, whilst pebble beaches form where destructive waves create steep profiles. Salt marshes develop in sheltered estuaries where fine sediments settle in calm waters.

Bars can form parallel to coastlines when destructive waves wash sediment seaward. Hooked spits curve landward, sometimes enclosing lagoons, whilst cusped forelands create triangular shapes where longshore drift operates in opposite directions.

Key Insight: Coastal alignment matters - swash-aligned coasts face waves head-on with limited drift, whilst drift-aligned coasts experience consistent longshore movement.

Transportation processes move sediment in four ways: suspension (fine particles floating in water), solution (dissolved minerals), traction (large boulders rolling), and saltation (small stones bouncing along). Flocculation helps clay particles clump together and sink in salty water, contributing to mudflat formation.



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Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

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This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

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very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

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I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

 

Geography

162

21 Dec 2025

1 page

Understanding Coastal Landforms: Their Role in Shaping Coastal Landscapes

Coastal geography reveals how powerful waves constantly reshape our shorelines through erosion and deposition. Understanding these processes helps explain why some coastlines have towering cliffs whilst others feature gentle sandy beaches.

Waves -
-waves are energy
moving through water.
- They are affected by:
-Wind Strength stronger fetch
- Wind duration=longer T fetch
- Water

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Wave Energy and Coastal Processes

Wave energy determines whether coastlines experience erosion or build up new landforms. Waves gain their power from three key factors: wind strength, wind duration, and fetch (the distance wind travels over water).

Constructive waves are your beach-builders. They have low energy, arrive 6-9 times per minute, and create gentle beach gradients perfect for seaside holidays. Their strong swash (water flowing up the beach) carries sediment inland, whilst their weak backwash (water flowing down) leaves most material behind.

Destructive waves are the cliff-carvers. These high-energy waves crash ashore 11-15 times per minute with powerful backwash that drags sediment seaward. They create steep beach profiles and are responsible for dramatic coastal erosion.

Quick Tip: Remember constructive waves construct beaches, whilst destructive waves destroy cliffs!

Longshore drift moves sediment along coastlines when waves approach at an angle. The swash carries material diagonally up the beach, but gravity pulls the backwash straight down, creating a zigzag transport pattern that shapes our coasts over time.

Erosional Processes and Landforms

Four main erosional processes attack coastal rocks with relentless force. Hydraulic action compresses air into rock cracks, acting like a pneumatic drill. Abrasion occurs when waves hurl rocks against cliffs like natural hammers. Attrition gradually rounds pebbles as they collide with each other, whilst corrasion uses chemical reactions to dissolve vulnerable rocks like chalk.

These processes create spectacular erosional landforms. Wave-cut notches form at cliff bases, eventually creating overhangs that collapse and leave behind wave-cut platforms - those flat, rocky areas exposed at low tide.

Headlands and bays develop where resistant rocks stick out whilst softer rocks get carved into curved inlets. Over thousands of years, headlands can be sculpted into caves, then arches, stacks, and finally stumps as erosion continues its relentless work.

Remember: Erosional landforms follow a sequence - headland → cave → arch → stack → stump.

Subaerial processes also shape coasts through weathering (rock breakdown without movement) and mass movement (downslope movement including rockfalls, slumps, and flows).

Depositional Landforms and Transportation

When wave energy drops, deposition creates fascinating coastal features. Spits form when longshore drift deposits sediment across bay mouths, often developing curved ends where waves bend around them. If a spit connects an island to the mainland, it becomes a tombolo.

Beaches vary dramatically based on wave energy. Sandy beaches result from constructive waves on low-energy coasts, whilst pebble beaches form where destructive waves create steep profiles. Salt marshes develop in sheltered estuaries where fine sediments settle in calm waters.

Bars can form parallel to coastlines when destructive waves wash sediment seaward. Hooked spits curve landward, sometimes enclosing lagoons, whilst cusped forelands create triangular shapes where longshore drift operates in opposite directions.

Key Insight: Coastal alignment matters - swash-aligned coasts face waves head-on with limited drift, whilst drift-aligned coasts experience consistent longshore movement.

Transportation processes move sediment in four ways: suspension (fine particles floating in water), solution (dissolved minerals), traction (large boulders rolling), and saltation (small stones bouncing along). Flocculation helps clay particles clump together and sink in salty water, contributing to mudflat formation.

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Where can I download the Knowunity app?

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Most popular content: Erosion

Most popular content in Geography

Most popular content

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user