Explanation of Bradshaw's model
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
---|---|---|---|---|---|
Discharge increases | As more and more tributaries join the stream, they each bring more water. The catchment area is therefore bigger as distance downstream increases
🗑
|
||||
Occupied channel width increases | As tributaries join, discharge is greater. More water occupies the channel so width will increase. The water also has more velocity as its flow is less turbulent, so more hydraulic action occurs
🗑
|
||||
Channel depth increases | As tributaries join, discharge is greater. More water occupies the channel so depth will increase. The water also has more velocity as its flow is less turbulent, so more hydraulic action occurs
🗑
|
||||
Average velocity increases | The river becomes wider with a smoother riverbed and banks, which increases laminar flow, and makes it more efficient
🗑
|
||||
Load quantity increases | As the river travels downstream, it picks up more sediment to carry, and erodes more bed and bank rock
🗑
|
||||
Load particle size decreases downstream | The process of attrition makes sediment size smaller
🗑
|
||||
Channel bed roughness decreases downstream | Abrasion rubs and scours the bed and banks of the river by sedimentary material, smoothing the sides
🗑
|
||||
Slope angle decreases downstream | As more water joins from tributaries, lateral arosive power increases, so less downcutting occurs
🗑
|
||||
The wetted perimeter increases | Channel width and depth increase
🗑
|
||||
Turbulent flow decreases | The river becomes wider with a smoother riverbed and banks, making flow more laminar
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Rayrayy
Popular Geography sets