The Bradshaw Model: The Model Of The Bradshaw Model

The Bradshaw Model is a model to show and describe a river’s characteristics vary between the lower and the upper course of the river. The model includes gradient, channel bed roughness, load, velocity, depth, width and discharge.

How will velocity change as the river flows downstream?

The river velocity is the speed of water flowing along or through it. A rivers velocity can change during different courses of the river. This can be determined by the rivers gradient (how steep it is), the shape of the river, how much friction there is created by the river bed and the volume of water. Velocity is measured in meters per second.

Measuring the rivers velocity is not very hard, all you need is a floating object, and anything that can measure

Due to the large amount of water at the lower course of a river the velocity will normally go up. I predict that the velocity will go up as you move down the Mae Sa river course. The river velocity is the speed of water, which is mostly measured in meters per second. The velocity of a river is resolved by its efficiency to overcome friction. 95% of the rivers energy is lost by friction. I think that the river velocity will increase as it flows downstream because the channel roughness get smoother at the lower course of the river. The rougher the river bed is, the more friction it will cause, this will cause it to slow down the rivers speed. The shape of the river channel will also help determine the velocity. The river is wider, deeper and has a larger or higher discharge at the lower course of the river. Less water is flowing at the banks and the river bed in the lower course. So friction is reduced. Streams near the river source may look like as if they would be flowing very fast, but this is mostly very turbulent and allot of the water is nearly stationary. This particularly happens near the banks and bed where friction is

To measure the cross-section you will need to find the width of the river first. To do this, you will need to stretch a tape measure from one bank to the other at a 90° from the course of the river. Measure from where the dry banks touch the water. Once you have found the width of the river, your next job is to find the depth of the the river (across the width). The more detail you want, the more readings you will need to take. An example of a good interval would be 50 cm but it also depends on the width of the river. Leave the tape measure where it was when you measured the width to ensure you a straight line which can help you to measure the depth. It will also help you measure the distance between each