Water insecurity
Present and future water supplies can’t be guaranteed
Leads to need for political, economic and physical solutions
Physical water scarcity
Insufficient water available to meet demand (Water deficit)
Economic water scarcity
Can’t afford water even when it’s avaliable
Water stress
Countries water consumption exceeds it’s renewable fresh water supply by 10%
World water gap
Wealthy nations consume more and more water as poor nations struggle with less
Salt water enroachment
The process where saltwater moves into and contaminates freshwater sources, particularly groundwater near coastal areas
Bad if country relies on grounwater for irrigation + domestic use
E.g. Tuvalu + Maldives, East Coast USA
Fossil Water
Ancient water that has been trapped in aquifers for millions of years
(Ogallala)
Kenya Lotikipi aquifer
Supply for next 70 years even without replenishment that it gets from mountain streams
Kenya Tana River Floodplain
Dying due to dam causing no floods
Sustainable Drainage Systems
Meant to reduce runoff to prevent flooding in urban areas
Green roofs used in Southwold
Permeable pavements (gaps between slabs)