Energy of River

Mai multe ca aceasta

Chapter 3, Natural vegetation

creat de Wang ShiMei

Risk Managment

creat de Aaron Craw

Factors that influance river energy

creat de hui sien

Factors influencing enery of river

creat de Pacharida Vinitvorakul

Energy of River

Volume of River

Climate

Low rainfall will have lower volume of water.

High rainfall will have higher volume of water.

Permeability of rocks

Low permeabilty decreases infiltration and increases surface runoff, hence volume of water is high.

High permeability increases infiltration and decreases surface runoff, hence volume of water is low.

Presence of vegetation

Sparse vegetation leads to high surface runoff, thus increases the amount of water.

Abundant vegetation leads to low surface runoff, thus reduces the amount of water.

Size of drainage basin

Large drainage basin results in large volume of water.

Small drainage basin results in small volume of water.

Speed of Flow

Wetted Perimeter

Smaller wetted perimeter causes the speed to be high because there is less friction.

Larger wetted perimeter causes the speed to be low because there is a lot of friction.

Roughness of channel

Smooth channel increases the speed because of lower friction.

Rough channel reduces the speed because of higher friction.

Gradient of channel

Steep gredient causes the speed of river to be high.

Gentle gradient causes the speed of river to be low.