Primary economic activities Flashcards
Natural resources
Things provided by nature which are useful to people
Types of natural resource
Renewable
Non-renewable
Renewable resources
Can be used over and over again. With careful management, will not run out.
eg. cut down trees for wood, plant new trees
Non-renewable resources
Can only be used once.
Each time they are used, less is left for future.
Will eventually run out
Local water supply: Limerick City
Water in taps comes from River Shannon. Treated so it is safe to drink.
Filtering
Goes through filters to take out bacteria & viruses.
Use horizontal flow settling tank & rapid gravity filters.
Adding Chemicals
Chemicals added to make water better. Chlorine + fluoride.
Coagulants added to make water clear.
Storage
Pumped into storage resevoirs. Flows through mains to Limerick City into distribution pipes to homes, businesses, other users.
Central Valley project in California
Reasons
How it was completed
Advantages
Disadvantages
Reasons for Central Valley Project
Summer drought is a feature of Central Valley bc Mediterranean climate
North has Sacramento River w/ large supply of water from Rocky mountains. Most good farm land in south,
Solution = carry waters from north to south.
how central valley project was completed
Dams built on river, reservoirs created.
canals & aqua ducts built to transfer water from north to south
water stored in reservoirs of north for summer drought in south
advantages of central valley project
dry land can be irrigated
HEP is produced at dams to pump water to central valley
wide range of food can be grown in area to feed cities of San Francisco & LA
Disadvantages of central valley project
Reservoirs flooded land. People had to leave their homes.
Water loss through evaporation from canal & reservoirs is high. Water remaining is high in salt contetn, not suitable for farm land.
Scheme was expensive to construct so water charges & crop prices are high
positive effects of oil exploration in Irish waters
employment would increase as oil workers got jobs on rigs. Service industries would develop to supply rigs.
Irish gov would get more tax revenue from workers + oil companies
Transport & housing would improve towns near oil resources.
Negative effects of oil exploration in Irish Waters
Pollution from oil spillages would increase
Wild life, marine life, beaches would suffer
Areas of natural beauty would suffer from heavy engineering side effects of oil exploration.
why has fishing become an important industry in Ireland?
Waters rich in plankton
Fish found in these waters are high quality - high prices
Fish found in large single species schools, easier to get a good catch
Decline in fish stock elsewhere brought foreign trawlers
Irish coastal waters are free from serious pollution
Why overfishing occurred in the Celtic sea
Herron use shallow sheltered warm water near coast to spawn. Easy to fish these areas.
Herron predictable in movement, coming between October & January each year.
Come in large schools - attractive catch
Before spawning, Herron more suitable for processing, fetch high prices
Conservative measures for fishing
EU banned Herron fishing in 1977
Allowed fishing to resume but set quotas to limit amount each member state may catch in a year.
Regular surveys monitor size of fish stock