River transportation
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River transportation involves four processes by which a river carries eroded materials as its load: traction, where large particles bounce along the river bed; saltation, where larger particles roll and slide along the bed; suspension, where smaller particles are carried along without bed contact and form the greatest part of the total load; and solution, where dissolved minerals are carried in the water.
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Here are some suggestions for how to represent the river processes visually using diagrams:
Solution - Draw water droplets with dissolved minerals
Suspension - Draw particles floating in the water current
Saltation - Draw particles bouncing along the river bed
Traction - Draw larger particles being rolled along the river bed
You could also draw:
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Transportation - Arrows showing movement of particles downstream
Deposition - Build up of particles settling out of the water
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Let me know if any of these ideas are helpful or if you need any other suggestions!
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Sediment transport
Sediment is any particulate matter that can be transported by fluid flow and eventually deposited. There are four main categories of sediments based on size: gravel, sand, silt, and clay. Incipient motion, or the initial movement of sediment particles, is important to studying sediment transport and channel design. Two main approaches to modeling incipient motion are the shear stress approach and velocity approach. Shields developed a widely used diagram relating the critical shear stress needed to initiate motion to other dimensionless parameters like particle size, fluid properties, and sediment density. White's analysis also models critical shear stress as proportional to particle size. The velocity approach uses field surveys of permissible flow velocities before sediment starts moving in different channel materials.
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Fluvial Process And Related Land Forms
The document discusses fluvial processes and landforms. It describes various types of erosion caused by water including surface erosion through splash and sheet erosion, and channel erosion through rills, gullies, and streams. It also discusses drainage basins and patterns, explaining how drainage patterns are influenced by geology and reflect the arrangement of river courses. Various landforms resulting from fluvial processes are also mentioned.
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Similar to River transportation
River processes
River processes involve the transportation and erosion of sediment from mountains to the sea. Transportation occurs through saltation, solution, suspension, and traction. Erosion wears away sediment through corrasion, attrition, corrosion, and hydraulic action. Deposition is the opposite of erosion and occurs when the river's energy decreases, causing it to drop the sediment it was carrying, such as pebbles, stones, mud, sand, silt, and debris.
GEOGRAPHY IGCSE: RIVER PROCESSES
Rivers shape the surrounding land through the processes of erosion, transportation, and deposition as they flow from their source to their mouth. Erosion involves the wearing away of river beds and banks by hydraulic action, abrasion, attrition, and solution. Rivers pick up and carry materials through processes like suspension, saltation, and traction. The energy levels of rivers determine what materials can be transported, with higher energy near sources allowing larger objects and lower energy at mouths resulting in deposition. Deposition occurs when rivers enter shallow water or experience decreased volume, such as after floods or in drought, commonly forming deltas at river mouths.
11-170501121915.pdf
Rivers shape the surrounding land through the processes of erosion, transportation, and deposition as they flow from their source to their mouth. Erosion involves the wearing away of river beds and banks by hydraulic action, abrasion, attrition, and solution. Rivers pick up and carry material in suspension, saltation, and traction. The energy levels of rivers determine what materials can be transported, with higher energy near sources allowing larger objects and lower energy at mouths resulting in deposition. Deposition occurs when a river's energy decreases, such as when entering shallow water or after floods, often building up deltas at river mouths.
EROSION AND DEPOSITION.pptx topic on soil
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SEDIMENTARY ROCK (teach)
Sedimentary rock is formed through the weathering, erosion, and deposition of sediment from rivers and oceans over long periods of time. Layers of sediment are deposited and compressed under pressure from overlying layers, and minerals from seawater cement the sediment particles together into rock. The most common types of sedimentary rock include conglomerate, sandstone, shale, siltstone, and limestone.
12 s070502 e_erosion and deposition ppt
Erosion is the process by which rock material is detached and transported from one location to another by forces like wind, water, ice or gravity. There are several types of erosion including wind erosion, water erosion, wave erosion, gravitational erosion and glacial erosion. Deposition occurs when the transported material can no longer be carried by the force and settles in a new location. Deposition happens through processes like decreasing wind speed, slowing water flow or melting ice. Erosion and deposition work together to continuously change the landscape over time as material is worn down and rebuilt in other areas.
The work of rivers
Rivers shape the landscape through three main functions: erosion, transportation, and deposition. Erosion occurs via abrasion, attrition, hydraulic action, and solution as a river carries rock and sediment in its flow. Transportation involves traction, saltation, suspension, and solution of materials. Deposition happens when a river's volume or speed decreases as it enters areas like lakes, seas, or plains with gentler slopes. A river's erosional and depositional work depends on its energy, which relates to its volume, flow speed, and gradient of the land.
Sediment and sedimentary rocksssssssssssssssssssssss begin here
This document provides an overview of sedimentary rocks and the processes involved in their formation. It discusses the four main types of sedimentary rocks: clastic, chemical, biochemical, and organic. For clastic sedimentary rocks specifically, it outlines the five stages of formation - weathering, erosion, transportation, deposition, and lithification. It also describes common sedimentary structures like stratification, cross-bedding and ripple marks that provide clues about depositional environments. Finally, it lists some examples of terrestrial and marine sedimentary environments.
Depositing sediments
Weathered rock is carried by streams and rivers from mountains downstream, where the flowing water slows and larger bits of rock are initially deposited in the riverbed, though they may be moved during floods when the river's energy increases temporarily. As the water flows farther, only smaller rock fragments are carried along until deposited as well, with the finest bits like clay potentially making it all the way to the river's mouth and building up into a delta.
Sedimentary Rocks
This document provides an overview of sedimentary rocks, including their classification and common types. It discusses how sedimentary rocks form from sediments produced by weathering and are later cemented. The document classifies sedimentary rocks into detrital rocks (formed from rock fragments), chemically formed rocks like limestone, and residual deposits like laterite and soils. Detrital rocks like sandstone and shale are the most abundant sedimentary rocks, comprising around 95% of sedimentary layers and 4% and 0.75% of the Earth's crust, respectively.
The work of rivers 2
Rivers erode, transport, and deposit sediment as they flow across the landscape. Erosion occurs through abrasion, attrition, hydraulic action, and solution. Sediment is transported through traction, saltation, suspension, and solution. Deposition takes place when the river's volume or speed decreases, such as when entering a lake or plain with a gentler slope. A river's erosional work shapes the terrain and depends on its volume and flow speed.
River Channel Process
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This document discusses exogenic processes, which are external processes that occur near Earth's surface and are part of the rock cycle. It describes various types of weathering including mechanical and chemical weathering. Mechanical weathering breaks rocks into smaller pieces without changing their mineral composition through processes like frost wedging, insolation, and unloading. Chemical weathering decomposes rocks through oxidation, hydrolysis, carbonation, and biological processes. The document also discusses mass wasting, which transports weathered materials down slopes through various types of movements like rock falls, landslides, and flows that are influenced by gravity, water, and earthquakes. Erosion by agents like water, glaciers, and wind further transports materials by processes like solution
River Stages and Delta Formation
This document summarizes the stages of river development from youth to old age. It describes 3 main stages: 1) The youth or initial stage where the river erodes quickly down steep slopes. 2) The mature stage where the river slows and develops landforms like meanders and floodplains through erosion and deposition. 3) The old stage where the river reaches flat land and builds up deltas by depositing sediment in a triangular shape at its mouth before emptying into the sea.
EXOGENIC PROCESSES-ELS.pptx
Exogenic processes are processes that take place at or near the Earth's surface that cause the surface to wear away through physical and chemical weathering. Physical weathering breaks rock into smaller pieces through processes like ice wedging, plant growth, animal activity, and abrasion. Chemical weathering breaks down rock through chemical changes caused by water, oxygen, carbon dioxide, living organisms, and acid rain. Erosion by water, wind, ice, and gravity further transports weathered materials and shapes the landscape over time through sedimentation and mass wasting.
EXOGENIC PROCESSES-ELS.pptx
Exogenic processes are processes that take place at or near the Earth's surface that cause the surface to wear away through physical and chemical weathering. Some physical weathering processes include ice wedging, release of pressure, growth of plants, animal activity, and abrasion. Chemical weathering processes involve water, oxygen, carbon dioxide, living organisms, and acid rain breaking down rocks through chemical changes. Erosion by water, wind, ice and gravity then transports the weathered material away, which eventually settles as sediment through the process of sedimentation.
Exogenic processes
This document discusses various exogenic (surface) processes that shape the Earth's surface through erosion and weathering. It describes different types of physical and chemical weathering that break down rock material. Erosion by water, wind, ice and gravity is then able to transport this weathered material, causing landforms to change over time through deposition or sedimentation. Mass wasting specifically refers to the rapid movement of weathered rock and soil down slopes due to gravity, and can occur through different types of slides, flows, falls and creeps.
Chapter 8- erosional forces
1. Erosional forces like gravity, wind, water, and glaciers cause erosion by removing and transporting surface materials from one location to another through processes like mass movement.
2. Mass movement occurs as gravity pulls materials like rock and sediment down slopes, sometimes causing rapid events like landslides but sometimes occurring so slowly they are barely visible.
3. Glaciers are large masses of snow and ice that erode land as they move and later deposit sediments elsewhere, leaving behind features like moraines, eskers, and glacial till.
Exogenic Process.pptx
Exogenic processes are processes that take place at or near the Earth's surface that cause the surface to wear away through physical and chemical weathering. Some physical weathering processes include ice wedging, release of pressure, growth of plants, animals burrowing, and abrasion by wind and water. Chemical weathering breaks down rock through processes like reaction with water, oxygen, carbon dioxide, acids, and living organisms. Erosion by various agents like water, wind, ice and gravity further transports weathered materials and shapes the landscape over time.
Processes of River
The document summarizes various river, wind, and glacier processes. It discusses the three main types of processes that occur in rivers - erosion, transportation, and deposition. Erosion involves wearing away material from the river bed and banks. Transportation moves eroded material downstream, gradually reducing its size. Deposition occurs when energy levels drop and material is dropped from the river. Similar processes of erosion, transportation, and deposition occur for wind and glaciers.
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River transportation
- 3. Large particles such as gravel and coarse sand are lifted and dropped along the river, so they bounce along the river bed in a series of bed.
- 4. Larger particles like pebbles and boulders roll and slide along the river bed.
- 5. Dissolved materials containing minerals like calcium and sodium are carried in the water. Trying to look out for these type of load in a river? Too bad, they cannot be seen by a naked eye.
- 6. Smaller particles such as clay, silt and fine sand are carried along without contact with the river bed. Materials carried in suspension usually forms the greatest part of the total river bed.