The greater the wetted perimeter, the more friction the water encounters with the bed and sides. This reduces the speed of the river.
The Bradshaw model is a geographical model made in 1978, by Proffesor Michel Bradshaw, which describes how a river's characteristics vary between the upper course and lower course of a river. It shows that channel width, channel depth and the wetted perimeter increase downstream. The Bradshaw Model shows how certain elements of a river increase in size or amount in their journey downstream, while some decrease such as the load particle size.
material that a river carries along E.g (stone, grass & rocks)
A river's suspended load and bed load may accumulate at the river's mouth and form a delta. It is a land form created by the deposition of sediments.
a dissolved load
The size of the pebble will decrease down stream because the further downstream you go the quicker the river velocity. This means there will be more abrasion against the sides and bed of the river and the friction will be greater, this wears away the river load making it decrease in size. Increase velocity means that bigger material will be picked up by the river and carried as river load. More load in the river and increased size of load will mean more attrition and the river load will keep colliding into each other smoothening and rounding their shape. Brap brap !!
The smaller the load a river has the more sediment it can carry is false. When the river has more energy, it is able to carry a larger load, therefore more sediment.
Actually, the larger the load a river has, the more sediment it can carry. A river's capacity to transport sediment is often determined by factors like its velocity and volume of water flow. When a river has a larger load, it can transport more sediment downstream.
load
bedload
As a river gets older sediment load decreases due to the age of the river and erosion
Over their
it's called the river's load.