Download Abrasion (in rivers) erosion caused by the river picking up stones

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(in rivers) erosion caused by the river picking up stones and rubbing them
against the bed and banks of the channel in the flow
countryside within easy reach of urban areas
changes that take place to react to a situation or condition. (They may or may
not be successful)
Ageing population
a population with a rising average age
commercial agriculture that is owned and managed by large corporations
Air masses
large bodies of air (many thousands of km2 in area) that form over polar or
tropical source regions such as North Africa
Alternative energy
energy sources that provide an alternative to fossil fuels
the height of the land
Alternative fuels
fuel sources that provide an alternative to fossil fuels.
things like restaurants, health clubs, shops and cinemas that people want
access to
policies that seek to limit population growth by birth control.
equipment that the local community is able to use relatively easily and
without much cost
commercial fish farming, e.g.: rearing fish or prawns in ponds or submerged
an underground store of water, formed when water-bearing (permeable)
rocks lie on top of impermeable rocks
Asteroid collision
a large extra-terrestrial object - such as a meteor - passes intact through the
atmosphere and impacts with the Earth's surface
the upper part of the Earth's mantle, where the rocks are more fluid
Atlantic depressions weather systems that bring stormy conditions and frontal rainfall to the
western coastlines of Europe. (Depressions form when polar and continental
air masses meet over the Atlantic ocean.)
(in rivers) gradual wearing down of the particles by erosion as they collide
with each other, making them smaller and rounder.
the use of machinery, rather than people, in manufacturing and data
water from a breaking wave which flows under gravity down a beach and returns
to the sea
a feature produced when erosion creates an indent in the coastline
the number and variety of living species found in a specific area
fuel sources derived from agricultural crops
a plant and animal community covering a large area of the Earth's surface
the living part - plants and animals - of the Earth.
Birth Rate
the number of births per 1,000 people in a year
degradation of coral reefs under conditions if increased acidity in sea water
the view that when population grows it stimulates technological changes that
produce increases in output, ensuring that living standards can be maintained for
the growing population.
development projects that originate in local communities rather than in central
government or external agencies
Branch plant
a subsidiary business (usually a factory) set up by a company to meet an
increasing demand or need. They are often located away from the parent
company, but near some new market or cheap resource.
Brownfield site
a piece of land that has been used and abandoned, and is now awaiting some
new use
Bus lane
a marked lane in a road in which only public transport vehicles such as buses and
taxis are permitted.
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Call Centre
an office equipped to handle a large volume of telephone calls (especially
for taking orders or serving customers)
Carbon footprint
a measurement of all the greenhouse gases we individually produce,
through burning fossil fuels for electricity, transport, etc., expressed as
tonnes (or kg) of carbon-dioxide equivalent.
Carrying capacity
the maximum number of people that can be supported by the resources
and technology of a given area
Chocolate box village
a rural settlement that appears to match the picturesque, pretty image
sometimes used on boxes of chocolate, etc.
Convention on International Trade in Endangered Species of Wild Fauna
and Flora - an international agreement
Clark-Fisher model
a generalised description of how societies' employment structures
change as they develop
Climate Change
long-term changes in temperature and precipitation
Coastal flooding
the inundation of low-lying areas in coastal areas and regions
Coastal management
the processes and plans applies to coastal areas by local authorities and
Collision plate boundary a tectonic margin at which two continental plates come together
Commercial farming
a type of agriculture producing crops and livestock for sale and
the linkages between a product and the sources of its basic materials
and/or its components
a group of people with common interests, living as a community and
sharing benefits equally (often based on farming).
Commuter belt
a residential area within relatively easy reach of (and often surrounding) a
city, where many of the residents travel to and from the city daily.
Commuter dormitories
largely residential settlements lying within the commuting catchments of
towns or cities
people who travel from their home to their place of work, the distance
being such that the journey most often involves some sort of transport
Concordant coast
a coastline created when alternating hard and soft rocks occur parallel to
the coast, and are eroded at different rates.
Congestion charging
a system of traffic control that charges drivers who enter the congested
central areas of a city
managing the environment in order to preserve, protect or restore it
Conservative plate
where two tectonic plates slide past each other
Constructive plate
tectonic plate margin where rising magma adds new material to the
diverging plates
Constructive waves
small, weak waves with a low frequency that tend to add sand and other
sediment to the coastline because they do not break with much force
Consumer industries
industries that produce goods for people to use/consume
the using up of something
Continental crust
the part of the crust dominated by less dense granitic rocks
Continental shelf
the submerged edge of a continental land-mass.
Convection currents
(in tectonics) circulating movements of magma in the mantle caused by
heat from the core
Coral reef
a hard stony ridge, just above or below the surface of the sea, formed by
the external skeletons of millions of tiny creatures called polyps.
(in tectonics) the central part of the Earth, consisting of a solid inner core
and a more fluid outer core, and mostly composed of iron and nickel
Core region
the most important social, political and economic area of a country or
global region - the centre of power
chemical erosion caused by the dissolving of rocks and minerals by water
Corruption Perception
a measure, produced by Transparency International, to show how corrupt
the public sector of a country is, based on judgements by experts
the movement of people and employment from major cities to smaller
settlements and rural areas located just beyond the city, or to more
distant smaller cities and towns.
Cultural background
the origins of an individual's or group's belief system
Cultural dilution
where a particular culture is changed and weakened, usually by exposure
to other competing cultures.
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Death rate
the number of deaths per 1,000 people in a year
the chopping down and removal of trees to clear an area of forest.
the social, economic and environmental decline of an area, often through deindustrialisation
the decline in industrial activity in a region or an economy
a condition in which something (e.g. a country) is only able to survive by relying
on outside support (e.g. from another a country)
a theory that suggest that the poorer countries of the world supply resources,
and also wealth, to the richer countries through an economic system, involving
finance and trade, that favours the developed countries. Colonialism was a stage
of this and, today, free trade, loans, and the role of big corporations continue
this relationship, so that the poor countries are dependent on the rich countries.
the decline of a population, both by natural processes and, occasionally, by
government policy
the dropping of sediment that was being carried by a moving force
Deprived area
an area in which there is a damaging lack of the material benefits that are
considered to be basic necessities - employment, housing etc.
removing state regulations. Often applied to the financial institutions in England
after 1986 when many regulations about banks, building societies and other
financial intuitions were relaxed or abolished
Derelict land
land on which factories or houses have been demolished
the process by which land becomes drier and degraded, as a result of climate
change or human activities, or both.
Destructive plate tectonic plate margins where oceanic plate is subducted
Destructive waves large, powerful waves with a high frequency that tend to take sediment away
from the beach, because their backwash is greater than their swash.
countries at a late stage of development. They are generally quite rich, with a
high proportion of people working in secondary and, especially, tertiary
occupations. Also known as More Economically Developed Countries (MEDCs)
countries at an early stage of development. They are generally poor, with a high
proportion of people working in primary occupations. Also known as Less
Economically Developed Countries (LEDCs)
economic and social progress that leads to an improvement in the quality of life
for an increasing proportion of the population
Discordant coast a coastline created when alternating hard and soft rocks occur at right angles to
the coast, and are eroded at different rates.
a great difference - e.g. between parts of a country in terms of wealth.
Disposable income the amount of money which a person has available to spend on non-essential
items, after they have paid for their food, clothing and household running costs.
'Do nothing'
(in coastal management) an approach that allows natural processes to take their
course without any intervention
Drainage basin
the area of land drained by a river and its tributaries
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Eco footprint
a measure of how much land is needed to provide a place (e.g. a city) with all
the energy, water and materials it needs, including how much is needed to
absorb its pollution and waste.
the progress made by a country or area in creating wealth through
businesses, industry and trade.
Economic recession
a time of decline in business and industry, usually marked by a decrease in
wealth, an increase in unemployment, and closure of businesses.
Economic migrant
a person who moves in order to find employment
a community of plants and animals that interact with each other and their
physical environment.
Emerging countries
countries that have begun to experience high rates of economic growth, as
for example Brazil, Russia, China and South Africa (the so-called BRICS
countries); also known as the recently industrialising countries (RICs)
A person leaving a country or region to live somewhere else (for at least a
The proportion of people who work in primary, secondary, tertiary or
quaternary jobs.
Greenhouse Effect
The increased greenhouse effect resulting from human action (emission of
greenhouse gases) and leading to global warming
Enterprise Zones
areas designated by the government to promote economic growth, by being
able to offer financial benefits such as grants for buildings and machinery and
a relaxation of planning regulations.
Environment Impact a method of evaluating the effect of plans and policies on the environment
Assessment (EIA)
negative impacts on the natural environment, generally through human
Performance Index
a measure, produced by Yale University, that looks at the environmental
conditions that people live and the health of ecosystems
the degradation of the environment through the emission of toxic waste
the wearing away and removal of material by a moving force, such as a
breaking wave
a river mouth that is wide and experiences tidal conditions
the loss of oxygen in water after too much nutrient enrichment has taken
the removal of people from an area, generally in attempt to avoid a
threatened disaster (or escape from an actual one)
making full use of something (often implying that the use is unfair and has a
negative impact
the permanent loss of something, generally used with reference to species of
plants or animals, when there are no living examples left
Extreme Climate
a climate that is unusually challenging, usually in terms of its temperature
conditions or type and extent of precipitation.
Farmers' Market a set of stalls run by farmers and food growers from the local area
the distance of sea over which winds blow and waves move towards the coastline
Flood plain
the relatively flat area forming the valley floor on either side of a river channel,
which is sometimes flooded
Flood risk
the predicted frequency of inundation (floods) in an area
the movement of objects, people and ideas between places
Food chains
the interconnections between different organisms (plants and animals) that rely
upon one another as their source of food
Food miles
the distance covered supplying food to consumers
Food web
an illustration of the grouping of animals and plants found in an ecosystem,
showing the sources of food for each organism
Foreign direct when a business from one country invests money in a company in another country
investment (FDI) or builds its own factory or office in another country
Formal Sector
(of the economy) work where the people are formally employed, with permanent
jobs and regular pay (and they pay their taxes)
(environment) easily disturbed and difficult to restore therefore lacking in natural
resilience. Plant communities in fragile areas have evolved in highly specialised
ways to deal with challenging conditions. As a result, they cannot tolerate
environmental changes.
Frontal rainfall precipitation formed when a warm (tropical) air mass rises above a denser, colder
(polar) air mass. As the tropical air cools, condensation and precipitation occur.
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GDP per Capita
Gross Domestic Product per person, is the total wealth created within a country
divided by its population
Gas Exporting Countries Forum
Gender Inequality the part of the UN Development Programme reporting system that considers the
disadvantages (e.g. health, education) facing females in all countries.
Gene Pool
the genetic material contained by a specific population
climate events
climate changes that result from major geological events such as volcanic
the way that rocks are arranged, both vertically and horizontally
the science and study of the Earth's crust and its components
Glacial region
an area that is covered by ice (either a valley glacier or much larger ice sheets)
Global economy the evolving economic system that increasingly links the countries of the world; it
involves the exploitation of resources and the production and marketing of goods
and services
Global city
a major urban area that has a significant role in controlling the international flows
of capital and trade
Global shift
the movement of manufacturing from developed countries to cheaper
production location in developing countries
Global warming
a trend in whereby global temperatures rise over time, linked in modern times
with the human production of greenhouse gases.
the process, led by transnational companies, whereby the world's countries are
all becoming part of one vast global economy
GNI per capital
a measurement of economic activity that is calculated by dividing the gross (total)
national income by the size of the population. GNI takes into account not just the
value of goods and services, but also the income earned from investments
produced items and materials
the slope of the land
a scheme that originates within a local community rather than being imposed
from above
Green belt
an area around a city composed mainly of farmland and parkland in which
development is strictly controlled. Its purpose is to stop the outward spread of
the city
Green sector
that part of economic activity that pays attention to environmental issues
Greenfield site
a piece of land that has not been built on before, but is now being considered for
those gases in the atmosphere that absorb outgoing radiation, hence increasing
the temperature of the atmosphere
water contained beneath the surface, as a reserve
Gulf stream
a warm ocean current in the North Atlantic that flows from the coast of Florida
(USA) towards northern Europe
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an animal or plant's natural home
Happy Planet Index
a measure, produced by the New Economics Foundation, that measures
sustainable progress towards the well-being of people
Hard engineering
using solid structures to resist forces of erosion
Hard rock coast
a coastal region composed of resistant materials.
a part of the coastland that protrudes into the sea
Holistic approach
an approach to environmental management that treats the whole area as an
interrelated system
a place of special interest or appeal that attracts large numbers of visitors and
tends to become overcrowded at peak times
Hot arid regions
parts of the world that have high average temperatures and very low
Human Development a measure of development that uses four economic and social indicators to
produce an index figure that allows comparison between countries
Hydroelectric Power the use of fast flowing water to turn turbines which produce electricity.
Hydrogen Economy
a proposed system based on the delivery of energy that is derived from
hydrogen and so avoids the negative aspects of using fossil fuels
a graph which shows the the discharge of a river, related to rainfall, over a
period of time.
Hydrological cycle
the global stores of water and linking processes that connect them
electricity generated by turbines that are driven by moving water
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Ice age
a period in the Earth's past when the polar ice caps were much larger
than today
a person arriving in a country or region to live (for at least a year)
not allowing water to pass through
Industrial stage
the economic stage when manufacturing industry develops
the process whereby industrial activity (particularly manufacturing)
assumes a greater importance in the economy of a country or region
Infant Mortality Rate
the number of deaths of children (under the age of one) per thousand
live births a year
the process whereby water soaks into the soil and rock
Informal sector
(of the economy) forms of employment that are not officially
recognised, e.g. people working for themselves on the streets of
developing cities
the basic physical and organisational structure that are required to
support the development of businesses and industry (e.g. roads, power
Integrated Coastal Zone
Management (ICZM)
the system of dividing the UK coastline into zones that can be manages
Integrated river
a holistic system of managing rivers that takes an overview of the
whole river basin and the relationship between its different parts
Interlocking spurs
areas of high land which stick out into a steep-sided valley
Intermediate technology
a technology that the local community is able to use relatively easily
and without much cost
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lines of weakness in a rock that water can pass along
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Land degradation
the declining quality of and quantity of land. generally because of human
disposal of rubbish by burying it and covering it over with soil
the position of a place north or south of the Equator, expressed in degrees
natural embankments of sediment along the banks of a river
Life expectancy
the average number of years a person might be expected to live
Little Ice Age
a period of slight global cooling that lasted from around the mid-fifteenth
century to the mid-nineteenth century
Long profile
the gradient of a river, from its source to its mouth
Long-term planning
planning that looks beyond immediate costs and benefits by exploring
impacts in the future
Longshore drift
the movement of material along a coast by breaking waves
Lower course
that part of a river system that is close to the mouth of the river
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the size of something
Malthusian Theory
the view that population growth is the main reason why a society would
Mangrove swamp
a tidal swamp dominated by mangrove trees and shrubs that can survive in
the salty and muddy conditions found along tropical coastlines.
Marine ecosystem
the web of organisms that live in the ocean or a part of an ocean
a coastal environment or climate that lacks extremes of temperature, and
experiences higher rainfall, when compared with land-locked areas at a
similar latitude (distance from the equator)
Market economy
a system for business, industry and people based on free trade which is
influenced by supply and demand (with little or no government
Mass movement
the downslope movement, by gravity, of soil and/or rock by the processes of
slumping, falling, sliding and flowing.
the bends formed in a river as it winds across the landscape
very large mammals, such as those that lived during the last ice age
the provision of financial help (mainly capital) to small businesses and
private enterprises which do not have access to banking services
the central section of a river's course
a World Bank category for countries that are not very rich ('High-Income')
nor very poor ('Low-Income')
the process of people changing their place of residence, either within or
between countries
Development Goals
the development goals agreed by world governments at the UN summit in
September 2000
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Natural causes
those processes and forces that are not controlled by humans
Natural change
the change (an increase or a decrease) in population numbers resulting from
the difference between birth and death rates over one year
Natural increase
the difference between birth rate and death rate
Natural resources
those materials found in the natural world that are useful to man, and that we
have the technology and willingness to use
Net in-migration
the increase in a country's population as a result of more people arriving than
a system of linkages between objects, places or individuals
Newly industrialised countries which experienced rapid economic growth during the second half of
countries (NICs)
the twentieth century as a result of industrialisation, as for example Malaysia,
Hong Kong (now part of China), Taiwan and Singapore.
New economy
the emergence of new types of economic activity and employment in the last
few decades
a type of farming where farmers have no permanent land and migrate with
their cattle, etc. from one place to another
those resources - like coal or oil - that cannot be 'remade', because it would
take millions of years for them to form again
Nutrient cycle
a set of processes whereby organisms extract minerals necessary for growth
from soil or water, before passing them on through the food chain - and
ultimately back to the soil and water.
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Oceanic Crust
the part of the crust dominated by denser basaltic rocks
Organisation of the Petroleum Exporting Countries
Orbital changes
changes in the the pathway of the Earth around the Sun and in its axial
Organic agriculture farming systems that use no artificial chemicals
Orographic rainfall precipitation formed when an air mass rises above a relief obstacle
(mountains) leading to cooling and the condensation of water vapour
a process in which a company subcontracts part of its business to another
when water is being used more quickly that its being replaced
taking too many fish (or other organisms) from the water before they have had
the time to reproduce and replenish stocks for the next generation.
a situation where the population of an area cannot be fully supported by the
available resources. The symptoms include a low (even declining) standard of
living, overcrowding and high unemployment.
Ox-bow lake
an arc-shaped lake which has been cut off from a meandering river
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the outer limits or edge of an area, often remote or isolated from its core
an intensive form of food production that is both high-yielding and sustainable
because it is based on natural ecological processes.
permanently frozen ground, found in polar (glacial and tundra) regions
allowing water to pass through
Plate margin
the boundary between two tectonic plates
individuals and groups who are interested in and affected by a decision-making
relating to the North or South Pole. In polar regions the land is covered with ice
(glacial) or frozen (tundra)
Polar continental
an air mass whose source region is an area of land in cold, northern latitudes
(Siberia) and which may move westwards, bringing cold, dry conditions to
Europe in winter.
Political freedom
a measure calculated by several organisations (e.g. Freedom House) that looks
at the level of democracy in each country.
the presence of chemicals, noise, dirt or other substances which have harmful
or poisonous effects on an environment
Population pyramid a diagrammatic way of showing the age and sex structure of a population
the composition of a population, usually in terms of its age and gender
small air spaces found in a rock or other material that can be filled with water
Post-industrial stage that period in the development of a society when manufacturing industry
declines in importance, and is replaced by other forms of employment.
a state of shortage of money and goods, usually measured in terms of average
wealth and income in a society.
Poverty cycle
a set of processes that maintain a group or society in poverty
Pre-industrial stage that period in the development of a society when manufacturing industry has
yet to develop
when moisture falls from the atmosphere - as rain, hail sleet or snow
forecasting future changes
the process of of getting ready for an event.
maintain (something) in its existing state
working in the primary sector - extracting and exploiting raw materials
Primary sector
the economic activities that involve the working of natural resources agriculture, fishing, forestry, mining and quarrying.
Production chain
the sequence of activities needed to turn raw materials into a finished product
policies that encourage human reproduction and population growth
Pull factor
something that attracts people to a location
Push factor
something that makes people wish to leave a location
Quality of life
the degree of well-being (physical and psychological) felt by an individual or a
group of people in a particular area. This can relate to their jobs, wages, food,
amenities in their homes, and the services they have access to, such as
schools, doctors and hospitals.
Quaternary Period
the most recent major geological period of Earth's history, consisting of the
Pleistocene and the Holocene.
Quaternary sector
the economic activities that provide intellectual services - information
gathering and processing, universities, and research and development
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The Ramsar Convention on Wetlands is an intergovernmental treaty for
the conservation and wise use of wetlands
the creation of a new name, term, or design, for an existing organisation
or place.
development that aims to stimulate growth in areas that have
experienced decline
growth in areas that have experienced decline in the past
Regulated flow
the steady movement of water through a drainage basin that will not
bring flash flooding
Renewable resource
resources, such as forests, that can be maintained by management
countryside/rural area
rural areas that are distant from and thus little affected by urban areas
and their populations.
the way in which people react to a situation
Retirement communities settlements where most of the residents are retired
River cliff
steep outer edge of a meander where erosion is at its maximum
River pollution
the emission of harmful or poisonous substances into river water (or their
presence in the river)
water that flows directly over the land towards rivers or the sea after
heavy rainfall
Rural depopulation
the decline of population in rural areas and regions
Rural idyll
the common perception that rural areas are quiet and attractive - and
therefore good places to live in
Rural-urban migration
the movement of people from the countryside into towns and cities.
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Sea-level rise
the increase in the level of the sea, relative to the land
marked differences in temperatures and/or precipitation occurring during
different seasons of the year.
Secondary sector the economic activities that involve making things, either by manufacturing (TV,
car, etc.) or construction (a house, road, etc.). The sector also includes public
utilities, such as producing electricity and gas.
usually sand, mud or pebbles deposited by a river
those things that are provided, bought and sold that are not tangible
emergency relief
help and aid provided to an area to prevent immediate loss of life because of
shortages of basics, such as water, food and shelter.
the deposition of silt (sediment) in rivers and harbours
Slip-off slope
inner gentle slope of a meander where deposition takes place
describes a political approach where a government takes control of businesses,
industries, and infrastructure for the benefit of the community as a whole.
the progress made by a country in terms of improving the lives of people, and
also establishing ways in which people can participate in decision-making
Soft rock coast
a coastal area made up of easily eroded materials
the weathered remains of rock (sand, silt and clay) to which decayed organic
matter (such as the remains of leaves) has been added.
Solar output
the energy emitted by the Sun
the movement downhill of soggy soil when the ground layer beneath is frozen. It
often occurs in tundra regions
material deposited by the sea which grows across a bay or the mouth of a river
a detached column of rock located just-off shore
a person, group or organisation that has a direct or indirect interest in the
outcomes of a particular development or decision. Stakeholders can either
influence the outcomes or be affected by them.
the reorganisation of coastal defences that is often part of a managed retreat
a stack that has collapsed, leaving a small area of rock above sea-level.
weathering and mass movement
a type of agriculture producing food and materials for the benefit only of the
farmer and his family
the outward spread of the built-up area, often at lower densities compared with
the older parts of a town or city.
the world's most powerful and influential nations - the USA and, increasingly,
China and India
Supply chain
a sequence of steps or stages involved in moving a product or service from the
supplier to the customer. In the case of a product, the chain may involve the
processing of raw materials into components, and the assembly of components
into finished products. Such a sequence is often referred to as a 'production
the ability to keep something (such as the quality of life) going at the same rate
or level. From this stems the idea that current generation of people should not
damage the environment in ways that will threaten future generations'
environment (or quality of life)
development that meets the needs of the present without compromising the
(limiting) the ability of future generations to meet their own needs.
resources - such as wood - that can be renewed if we act to replace them as we
use them.
the forward movement of water up a beach after a wave has broken
a place of work where very poorly paid employees work long hours in
unsatisfactory and often unsafe conditions
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Tectonic hazards
threats posed by earthquakes, volcanoes and other events triggered by
crustal processes
working from home in the country, using computer communication
any form of work in which telecommunications replace work-related
travel (commuting)
Temperate climate
a climate that is not extreme (in terms of heat, cold, dryness or wetness)
Tertiary sector
the economic activities that provide various services - commercial (shops
and banks), professional (solicitors and dentists), social (schools and
hospitals), entertainment (restaurants and cinemas) and personal
(hairdressers and fitness trainers)
Thermal growing season
the number of months of the year when it is warm enough for the crops
to grow (6oC or above)
water that flows slowly through the soil until it reaches a river
Tipping point
the point at which the momentum of a change becomes unstoppable
Top-down projects
projects set up and organised by governments often with little
consultation with local communities
a large company operating in several countries
Tropical continent
an air mass whose source region is an area of land in the tropics (north
Africa) and which may move northwards, bringing hot, dry conditions to
Europe in summer.
the flat, treeless Arctic regions of Europe, Asia and North America, where
the ground is permanently frozen.
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a situation where the resources of an area could support a larger population
without any lowering of the standard of living or where a population is too
small to develop its resources effectively.
unable to be kept going at the same rate or level
Upper course
the source area of a river, often in an upland or mountainous region
Urban development organisations set up by central government to coordinate rapid improvements
in derelict urban areas. Their aims were to improve the environment, to give
cash grants to attract firms, to renovate buildings and to give advice to firms
thinking of moving in.
Urban fringe
the countryside adjacent to or surrounding an urban area
Urban sprawl
urban growth, usually weakly controlled, into surrounding rural and semi-rural
the development and growth of towns or cities
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Volcanic activity
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the escape of molten rock, ash and gases from an opening in the Earth's
surface (or when there is evidence that it is imminent)
Water flow
movement processes of the Earth's water, including evaporation, precipitation
and overland flow
Water harvesting storing rainwater or used water ('grey water') for use in periods of drought
Water insecurity when safe water availability is insufficient to ensure the population of an area
enjoys good health, livelihood and earnings. The condition can be caused by
water insufficiency or poor water quality
a lack of adequate water supplies needed to meet a society's economic and social
programmes to control rivers, generally organised by local or central government
Water store
a build-up of water that has collected on or below the ground, or in the
Water table
the level in the soil or bedrock below which water is usually present
Water transfers
movements of water and water vapour through the biosphere, lithosphere and
sudden descent of a river or stream over a vertical or very steep slope in its bed
when rainfall and/or river flows vary from season to season, sometimes
unpredictably, resulting in periods of water scarcity.
the breakdown and decay of rock by its natural processes, without the
involvement of any moving forces
uncultivated, uninhabited and inhospitable regions
World cities
the leading cities of the world, such as London, New York and Tokyo; major
centres in the economic networks being produced by globalisation. They are
major centres of finance, business and political influence, and are home to the
headquarters of many TNCs
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Youthful population
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a population in which there is a high percentage of people under the age of
16 (or sometimes 18)
Zero population
when natural change and migration change cancel each other out, and there
is no change in the total population.