sample questions river environments Flashcards
identify the stores and transfers in the hydrological cycle
ground water, surface water or in ice caps and evaporation groundwater- flow
What do you understand by the term ‘River Regime’
the way the discharge of a river changes over time
Explain two factors that affect a river regime (4 marks).
steep slopes as they cause rapid surface run off so water will reach the rivers quickly/. Heavy rain when it doesnt sink into the ground it will overflow onto land and reach the rivers
Explain how stream velocity can affect erosion and deposition
As moving water picks up and carries particles of soil and rock. As water slows larger particles are deposited
Describe the typical changes to a river channel as it flows downstream
As a river flows down steep slopes, the water performs vertical erosion . This form of erosion cuts down towards the river bed and carves out steep-sided V-shaped valleys. … As the river moves from the source to the mouth – both the depth of the river and the width of the river will both increase
With reference to at least one example and using a diagram, describe and explain the stages in the formation of a stump
When the arch collapses, it leaves the headland on one side and a stack on the other. The stack will be attacked at the base in the same way that a wave-cut notch is formed. This weakens the structure and it will eventually collapse to form a stump.
what is the discharge of a river
volume of water passing a river during a time period
give one change that flooding brings to a rivers valley
silt deposition
what is a flood plain
formed by deposition during flooding; made of slit and plain
give two reason why the demand for water is increasing in urban areas
population increase so more people using water
richer people so a rising livening standers
give three reason why global use of water is rising
population growth
increase demand popularity of dishwaters
rising living standers
what is a river regime
the way the discharge of a river changes over time
outline two factors affecting a river regime
rainfall discharge drops with low rainfall temperature melting spring snow raises discharge
what is meant by river erosion
running water wearing away its channel and removing the debris
