GPN 29 Hjulström Curve

What does the Hjulström Curve show?

• The balance of erosion, transportation, and deposition shifts as a river moves downstream.

• The temperature changes in a river

• The chemical composition of river water and it's pH

• The aquatic wildlife diversity in a river

The x-axis of the Hjulström Curve is measured:

• logarithmically

• arithmetically

The faster the thalweg (river current) the more:

• Erosion

• Deposition

What does the settling velocity line show on the Hjulström Curve?

• How big particles can get before they start getting dropped.

• The temperature of the river.

• The chemical composition of the river.

• The wildlife diversity in the river.

Which material is more cohesive?

• Clay

• Sand

• Pebbles

What is the term used for the maximum size of material the river can carry in suspension at a given velocity?

• Competence

• Capacity

• Cohesion

• Conglomeration

What does the term 'traction' refer to?

• Large boulders and pebbles are rolled along the river bed.

• Dissolved minerals are carried by the river.

• Fine material such as clay and sediment is carried by the river.

• Small stones, pebbles, and silt bounce along the river bed.

The Hjulström Curve uses the term _______ to mean the total load carried by the river.

• capacity

• competence

• traction

• velocity

The Hjulström Curve shows that sand is lighter than pebbles and boulders, so it can be carried at _______ velocities.

• lower

• higher

• constant

• variable

What does the term 'saltation' refer to in the context of the Hjulström Curve?

• Small stones, pebbles, and silt bounce along the river bed.

• Large boulders and pebbles are rolled along the river bed.

• Dissolved minerals are carried by the river.

• Fine material such as clay and sediment is carried by the river.