River Processes And Landforms

Question 1

How are levees formed?

Answer 1

Levy’s are found along the old stage of the river Leffy. Levees are raised banks.(natural or man-made.) that form along the edges of rivers and help prevent flooding. They develop through the process of deposition. Floating occurs during heavy, rainfall or snow melt the river’s water level rises and overflows its banks.
1 deposition of sediment— as the float water spreads out, it slows down. Losing energy and dropping the heaviest sediment such as sand and gravel closest to the riverbanks.
2. Gradual buildup — overtime, repeated flooding deposits, more and more sediment, gradually building up embankment. These are the natural leaves.
3. Find settlement saddle further away.— lighter materials, like slit and clay are carried away, helping form fertile flood planes beyond the leaves. Artificial leaves can also be built by humans using soil, concrete or other materials to control flooding and protect settlement.

Question 2

Two ways humans interact with the river.

Answer 2

1. Sport and recreation.— rivers are used for activities like fishing, kayaking, rafting, and swimming, providing leisure opportunities for local communities and tourists
2. Water supply — rivers provide freshwater for drinking, sanitation, and industrial use. Many cities and towns depend on rivers as their primary water source.

Question 3

How is the waterfall formed?

Answer 3

Waterfall form in the youthful stage of a river due to differential erosion, we soft rocker rides faster than hard rock. Hydraulic action is the main force, with moving water, wearing away the soft rock, while abrasion uses the rivers load to further around the bed and bikes, shaping the plunge pool. As the river carries, it’s loads over the fall it deepens the plunge pool. Solution arose the back wall, creating an overhang of hard rock that eventually collapses into the plunge pool. This process repeats, causing the waterfall to retreat upstream, forming a gorge through erosion.

Question 5

One way flooding has increased

Answer 5

1. Building on flood planes.— county councils have a allowed construction of housing estate on floodplains
2. Clearing trees for houses and farmland.— trees, which would have absorbed water from rainfall, much of what now runs off into rivers

Question 6

How to reduce flooding

Answer 6

1. Don’t build on flood planes.
2. Plant more trees, which will absorb brain water during heavy downpours. Reforestation.

Question 7

3 processes of a river

Answer 7

Erosion
Transportation
Deposition

Question 8

Processes of river erosion

Answer 8

Hydraulic action — it’s the force of fast flowing water that breaks up the bed and the banks almost like a power hose
Abrasion — stones carried by the river (load) hit against the beds and banks and wears them away
Solution — when river water dissolves the rocks over which it flows
Attrition — when stones roll along the bed or collide with each other. They become more round and smooth over time

Question 9

Processes of river transportation

Answer 9

Suspension
Solution
Traction
Salutation