![Top curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/main_top_grad.gif)
By Water
Around the world, moving water picks up and transports millions of tonnes of sediment every day, along rivers, coasts, and even in the deep oceans.
![Erosion by water diagram](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/Processes/Erosion/river%20or%20beach.jpg)
- Traction is the rolling or dragging of large grains along a river bed or shore, aided by the push of the smaller grains (below).
- Saltation is the bouncing of sand grains as they are picked up, carried along, and dropped repeatedly by flowing water.
- Fine particles (silt and clay) are carried in Suspension in the water – they will only settle out if the water is still.
- Soluble salts are carried in Solution in the water – the sea is obviously salty, but rivers contain dissolved salts, too.
Erosion & Transport by Rivers
![Rivers image](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/Processes/Erosion/Rivers1.jpg)
Sediment transport by water animation
Erosion & Transport in the Sea
![Erosion & Transport in the Sea](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/Processes/Erosion/The%20Sea1.jpg)
![Bottom curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/bottom_curve.gif)