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Water resources and Water footprints, Water footprint of a Nation, Water…
Water resources and Water footprints
Water distribution
97,5 Salt water
2,5 Freshwater
30,1 Groundwater
1,2 Other
3 Atmosphere
0,3 Living Things
3,8 Soil Moisture
0,5 Rivers
20,9 Lakes
2,6 Swamps and Marshes
69 Ground Ice & Permafrost
68,7 Glaciers & Permanent Snow
Facts
In the last century, our use of water worldwide has grown at more than twice the rate of the human population growth
Water Use
US direct
19 Faucet
20 Shower
US Indirect
Freshwater uses
Low and mid income
10 dom
11 indu
79 agri
High income
42 indu
17 dom
41 agri
World
18 indu
12 domestic
70 agri
Vocab
Indirect Water
Embedded water
Virtual water use
hidden water
Water footprint
Type of water
Blue water
fresh surface water
footprint
surface or groundwater evaporated
Evaporate and transpires
Is incorporated
does not return to the same area nor period
Green water
rainwater
footprint
rainwater evaporated
precipitation on land that does not run off or recharge groundwater (temporarily)
Incorporated into harvested crop or wood
Evapotranspiration of fields and plantations
Captured by the soil and vegetation
Grey water
waste water
footprint
polluted water
consumption of freshwater that is required to assimilate the load of polluted based on natural background concentrations and existing ambient water quality standards
No ISO
14046 en cours
Water VS Carbon
Carbon
no spatial nor temporal dimension
global averages values
supply-chain only included in scope 3
many efforts focused on offsetting
Water
actual, locally specific values
always reffering to full supply-chain
Spatial and temporal dimension
focus on reducing own water footprint
Water VS LCA
Water footprint
multi-dimentionnal (type of water use, location, timing)
actual volumes, no weighing
measuring freshwater appropriation
Offer basis for impact assesment and formulation of sustainable water use strategy
LCA
no spatial dimension
weighing water volumes based on impacts (percentages)
measuring overall environmental impact
Basis for comparing products with respect to overall environmental impact
Water footprint of a Nation
Two components
Internal water footprint
inside the country
External water footprint
volume of water used in other countries and imported
water loss for the home country
Total water used to produce goods and services consumed by the inhabitants
National water footprint
plus virtual import
minus virtual export
plus national water use
Calculation
Bottom-up
sum of goods * water footprint
Top down
general
National water footprint accounting
Virtual water budget
.
Water footprint
Virtual water export
.
Water use within the country
Virtual watr export
Water footprint
Internal water footprint
External water footprint
Virtual water import
External water footprint
Virtual import for re-export
Virtual water export
Virtual water export related to domestically made products
Virtual import for re-export
Water use within country
Internal water footprint
Virtual water export related to domestically made products
Traditionnal statistics on water use
Water footprint for a business
Water footprint def
Operational
Direct
Supply-chain
Indirect
Inputs
Services or goods