What is Saltation load?
The part of the bed load that is bouncing along the stream bed or is moved, directly or indirectly, by the impact of bouncing particles.
What is Bedload flux?
Bedload flux is an important component of the total fluvial sediment flux. Bedload. dynamics can have a substantial effect on rivers and coastal morphology, infrastructure. sustainability, aquatic ecology and water availability.
Why does a river get wider downstream?
The slope of a river decreases as it flows progressively downstream. Gravitational force is stronger uphill, but gentle in the lower course. The water tends to flow slowly due to higher water friction, hence the width increases.
How does a river change from upstream to downstream?
Velocity increases as more water is added to rivers via tributary rivers. This means that less of the water is in contact with the bed of the river and the mouth so there is less energy used to overcome friction. Hence rivers flow progressively faster on their journey downstream.
How does the sediment size and shape change downstream?
When discharge is high vertical erosion erodes the river bed and larger sediments are transported by traction. The river channel gets deeper and wider as the bed and banks are eroded. The sediment load of the river gets smaller in size. Small meanders and a small floodplain can be found in this part of the river.
What happens to Bedload with distance downstream?
The nature of bedload also changes downstream. In the upper course of the river bedload is larger and more angular. As we track the river downstream bedload becomes much smaller and smoother. In the lower course bedload can only really be found in the form of fine sediments and muds, known as alluvium.
How does a cross profile change downstream?
As the river flows downstream it is joined by tributaries, increasing the volume of water, velocity and therefore its erosive power. This enables it to cut a deeper channel as it flows downstream. Downstream, the channel becomes wider as the gradient becomes more gentle leading to less vertical erosion.
What is the technical word for erosion sideways?
A meander is a winding curve or bend in a river. Meanders are the result of both erosional and depositional processes. They are typical of the middle and lower course of a river. This is because vertical erosion is replaced by a sideways form of erosion called LATERAL erosion, plus deposition within the floodplain.
What are the synonyms for erosion?
erosion
- wearing away, abrasion, scraping away, grinding down, crumbling, wear and tear, weathering, dissolving, dissolution.
- eating away, gnawing away, chipping away, corrosion, corroding, attrition.
- wasting away, rotting, decay.
- undermining, weakening, sapping, deterioration, disintegration, destruction, spoiling.
What words are related to erosion?
other words for erosion
- corrosion.
- decrease.
- destruction.
- disintegration.
- abrasion.
- consumption.
- despoliation.
- wear.
What is an example of attrition?
The definition of attrition means wearing down or wasting away, or the natural decline in the number of people working in an organization. An example of attrition is a cliff face eroding due to rain and wind. An example of attrition is one army wearing down another throughout the course of a war. noun.