EQ3 Flashcards
What are the 3 futures of water management?
Business as usual
Water Crisis
Sustainable Water
What will business as usual result in?
By 2025 food production decrease, water consumption increase by over 50%, household water use increase by 70%, industrial water demand increase
Developing reliant on water imports
Sub-Saharan grain imports will triple
Water pumped faster than we can recharge aquifers in Egypt, N Africa, West USA, China and India
What will a water crisis result in?
By 2025 global consumption will increase due to migration
Domestic demands decrease
Industrial demands increase
Food production decrease, food prices increase, food insecurity in developing, decline in dam building, failure of aquifers, increasing conflict
What will sustainable water result in?
By 2025 global consumption will decrease
Industrial water will decrease
Increased environ. flows
Increased global raid fed crop yields as water harvesting improvements and sustainable farming
Agricultural and household prices double in developed & triple in developing
Food production increases, prices decrease, invest in crop research tech., water management reforms, end of unsustainable groundwater pumping, gov. delegate farm management to community groups
Why does CC exacerbate the problem?
Increased temps -> easier snowmelt in mountains -> increase in spring discharge in major river basins -> cannot store effectively so lost to oceans or evaporated -> loss of primary water source
Extreme weather events -> cyclones and monsoons threaten supplies intermittently
Extreme weather events -> increased freq. and intensity of droughts -> dried up rivers -> irrigation failure -> depleted aquifers
What political water players are there?
UN Gov. departments (DEFRA) Regional & local councils Lobbyists pressure groups
What economic water players are there?
World Bank Gov. Developers Utility Companies (Thames Water) Agriculture Industry TNCs & businesses
What social water players are there?
Individuals Residents Indigenous Landowners Farmers Consumers Health officials Scientists NGOs (Water Aid)
What environmental water players are there?
Conservationists Scientists Planners International Organisations (FAO) NGOs
What are the 3 possible responses?
Hard engineering
Restoration of rivers, lakes, wetlands
Water conservation (reducing amount used rather than increasing supply)
What will hard engineering involve?
Dam construction (for irrigation, HEP, flood control, domestic water)
- will be limited by high costs for developing
- Disrupt floodplain agriculture, fisheries and forestry
- locals will be starved of welfare investment and livelihoods disrupted (resettled)
What will restoration involve?
- restore meanders
- Replant veg.
- Sustainable methods managing watercourses
What will conservation involve?
efficient irrigation treat/recycle in industry conserve wetlands to develop eco-hydrological view Increase prices water metres fertigation 'drip' irrigation or modern spray tech.
How can water tech. help?
Can increase supply and access
Civil engineering skills & construction tech. used for water transfer
desalination
Diversion, transfer, storage, conservation & restoration also uses tech.
What does desalination involve?
- freshwater for human consumption & irrigation
- osmosis membrane tech.
- v. expensive so for developed
- high quality water produced but chemically different than rainwater
- brine is by-product having ecological effects