Geography AQA, Water on the Land

Geography AQA, Water on the Land revision

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  • Created by: Megan
  • Created on: 16-04-12 17:20

Definitions

Corrasion/Abrasion

Caused by fine material rubbing against the river bank like sand paper

Hydraulic Action

When the force of the water hits the river bank and causes it to collaspe

Corrasion/Solution

When acids in the water break down (corrode) rocks in the water

Traction

Large rocks and boulders are rolled along the bed of a river

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Definitions

Saltation

When smaller rocks are bounced along the river bed - like leapfrog

Suspention

Small rocks are light enough to be carried by the river flow

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Definitions

Saturation

When the rock or soil is full of moisture

Water Table

The level when saturation occurs

Infiltration

When the ground soaks up the water into the soil

Transpiration

Water vapour realeased by trees and plants

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Definitions

Surface Storage

When water collects on land - e.g in lakes and puddles

Percolation

Water moving downwards into the soil through to the rocks below

Percipitaion

Rain, Hail, Sleet or Snow

Groundwater

Water stored in porus rocks deep below the ground

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Definitions

Approach Segment (Flood Hydrograph)

Shows the river discharge before it rains

Falling Limb (Flood Hydrograph)

Shows a slow decrease in rainwater reaching the river

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Water Supply - Management Options

Long Distance Transfer - Moving water over long distances from one place to another

Inter Basin Transfer - Moving water across the watershed from one basin to another

Surface Water Storage - Building new resevoirs

Densalinisation - Extracting water from underground sources from boreholes

Groundwater Supplies - Extracting water from underground sources

Artificial Aquifers - Pumping water into underground rock for later use

Effluent Re-Use - Re-Cycling water after it has been treaed in sewage works by returning it to rivers

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Water Supply - Demand Management Options

Metering and Pricing - Charging customers for the amount of water they actually use

Leakage - Repairing leaks to reduce demand on treatment works

Publicity and education - Let people know about probalems so they change their attitudes and behaviour

Innovations - Making water efficient products so there is less wasted

Legislation - Introducing new bylaws for people to use water efficient things

Restrictions - Putting restrictions on how much water can be used

'Grey' Water Re-Use - Re-Cycling water which has been used once in the home for other purposes, e.g watering plants

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Comments

Sasha Dean

thank you this has helped a great deal

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