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Erosion is, by definition, a wearing away of a substance. As water flows downstream it carries debris in the form of boulders, stones silt and mud. As this debris, some of which is in suspension, is flung against the banks it undercuts and, therefore, erodes the banks thus increasing the width in places. Debris is also transported by traction (rolling along the bottom of the river) and saltation (bouncing along the bottom), both of which erode the bottom of the river, thus increasing the depth. Solution also plays a part - that is chemicals which are unseen, but are dissolved in the water - it affects rocks over which it passes, particularly limestone. However, in other places deposition also occurs which can reduce depth and width. Similar processes occur in lakes, especially where a river flows into or out of them.
What else can I help you with?
Why does depth and width increase downstream?
Depth and width of a river typically increase downstream due to several factors, including increased water volume from tributaries, reduced gradient, and erosion processes. As water flows downstream, it erodes the riverbanks and bed, widening and deepening the channel. Additionally, sediment transport and deposition can alter the river's shape, contributing to these increases in size. Overall, the combination of hydrological dynamics and geological processes leads to a broader and deeper river downstream.
When the discharge of a stream increases what happens to the streams width?
When stream discharge increases, more water is flowing through a corridor. To accommodate that, the water will rise in the channel. Depending on the geometry of the channel, the width of wetted water surface may increase as the water fills a different geometry. If the width of the cross-sectional geometry is constant, however, only depth will increase, along with velocity.
What is vertical erosion?
Vertical erosion is when the depth of the river is greater than the width causing erosion to take place on the bed of the river. This is also when lots of water enters the river but not as much is exiting it.
Why does the rivers wetted perimeter increase as we travele downstream?
Because the Width and Depth both increase downstream. This means the wetted perimeter will also increase.
What would be the unit of stream width and depth?
Stream width is typically measured in meters or feet, while stream depth is measured in meters or feet as well. These units are used to quantify the dimensions of the stream channel.
What is the definition of cross sectional area of a river?
It is the area of the plane (the surface) covered by the water in the river channel. It is the product of the width of the channel, and the average depth of the river
How do you find the depth to width ratio?
Measure the depth and width using the same units. Divide the depth measurement by the width measurement.
Does the volume of water affects erosion?
Yes, if depth is increased as a result. Because P=pgh, or Pressure = density x grativational acceleraton x depth, if an incarease in volum leads to an increase in depth (not length or width of a container or area), then pressure increases. Then, since P=F/a, or Pressure = Force/ area, as pressure increases, force increases (again, provided that the area of the applied force does not increase. With net force increasing, the rate of erosion will increase.
In what order do you show width height depth in inches?
width, depth and height
What is the Width and depth of nantucket harbor entrance?
The channel is approximately 300 feet wide with a depth of 14 feet, although there is a hump of 11 feet near buoys #10 & 11.
What is discharge river a measurement of?
river discharge is when the amount of water is measured and the amount that is in the river channel, and at a given point (width,length,depth)
Is the length or the width the depth of a cabinet?
The depth is neither the length nor width. Length is the measurement from top to bottom, width is from side to side, and depth is from front to back.
