1 Statistics of the Environment Water Statistics Manual for water data collection Tables 2,3 and Summary Luxembourg 29 th 30 th June 2004 Tables 2, 3 and Summary • Table 2: Gross Water Abstractions = Water withdrawal = Water removed from any source. • Table 3: Water Uses = Water really applied • Summary Table: Links Tables 2, 3
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Statistics of the EnvironmentWater Statistics
Manual for water data collection
Tables 2,3 and SummaryLuxembourg 29th 30th June 2004
Tables 2, 3 and Summary
• Table 2: Gross Water Abstractions = Water withdrawal = Water removed from any source.
• Table 3: Water Uses = Water reallyapplied
• Summary Table: Links Tables 2, 3
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Table 2
• Table 2.1 Annual Water Abstractions by Source (Fresh, Groundwater and total)
• Table 2.2 Other Sources of water (Non Conventional)
Non Conventional is a “provisional” concept
Tables 2.1 and 2.2• Source 1
– Sector 1– .............– Sector N
• ................
• Source N– Sector 1– .............– Sector N
Sources:
•Fresh surface water
•Fresh groundwater
•Non freshwater (Marine and brackish)
•Desalinated
•Reused
Sectors:
•Public Water Supply
•Agriculture, forestry and fishing
•Manufacturing industry
•Production of electricity
•Households
•Other activities
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Tables 2.1 and 2.2
• Table 2.1 includes additionally to gross water abstractions:– Returned water (Total): Water abstracted and later on
discharged without use (or before Use)– Net abstraction: Gross abstraction – Returned water
• Table 2.2 includes additionally to gross water abstractions:– Imports of water: Traded water coming from outside
(other territory is said)
Table 2. Usual Practices• Summary of results from the survey are
included in annex 2.1 of the manual (France, The Netherlands, Sweden and UK)
• Types of measurements:– Metering– Indirect
• Licensing• Facilities (pipes, pumping, etc capacities, duration, etc)• Other
– Metering for domestic, comercial andindustrial sectors
– Indirect measurements in the agriculturalsector
• Metering in increase due to theimplementation of the cost recoveryprinciple (Water Framework Directive)
Table 3• Table 3.1 Water use by supply category
• Table 3.2 Water use by industrial activities
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Tables 3.1 and 3.2• Supply Category 1
– Sector 1 (3.1) or Industrial activity (3.2)– .............– Sector N (3.1) or Industrial activity (3.2)
• ................
• Supply Category N– Sector 1 (3.1) or Industrial activity (3.2).............– Sector N (3.1) or Industrial activity (3.2)
Supply categories:
•Public water supply (A sector in 2.1)
•Self supply
•Other supply (Only agriculture)
Industrial activities:
•Manufacturing•Food
•Basic metals
•Transport
•Textiles
•Paper
•Chemicals
•other
•Mining and quarrying
•Construction
Table 3
• Table 3.1 includes additionally to wateruses:– Losses during transport
• Evaporation losses• Leakage
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Table 3. Usual Practices
• Summary of results from the survey are included in annex 2.1 of the manual (France, The Netherlands,Spain, Sweden and UK)
• More complicated than Table 2 due to:– More users than abstracters– The nature of the use is more diverse
• Usual practices based in indirectmeasurements
Conclusions andRecommendations
• Need of Confidence limits (Example of UK in Annex 2.2)
• Water metering is high (exceptions UK, Norway...) in commerce, industry anddomestic sector (good accuracy for publicwater supply and major industrial self supply).
• The problem of the different sectors servedby public water supply.
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Conclusions andRecommendations
• In many cases, the only way is using indirect methodologies.– GIS is a very valuable tool. For instance
allows different geographical aggregations.– Example: Water uses assessment in Spain
(White Paper on Water. Ministry of Environment 2003).
Population in Madrid and Valencia (data available)
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Household water use distribution from population and theoretical unitary uses
Annual Water use in Spain (estimated)
(Household+irrigation+industrial)
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Summary table. Water use balance
• Links between Tables 2 (abstractions) andTables 3 (uses).
• Allows the obtention of consumptive wateruse and total water consumption:C = Water available for use – leakage –returned
waste waterTWC = C + losses by evaporation + discharges to
sea
Ex
Freshwater FlowsIm + DsW
WWI
RuW
A
CWI
CW
Freshwater Resource
LRW
C
A
Le
WAU=A - RW - Ex + RuW + Im + DsW
WW
CWM
WWM
A Abstractions
C Consumptive water use
CW Cooling water
CWI Cooling water discharged to Inland waters
CWM Cooling water discharged to Marine
DsW Desalinated Water
Ex Exports
Im Imports
Le Losses by evaporation
L Losses by leakage
RuW Reused Water
RW Returned Water
WAU Total Water Available for Use within the Territory
WW Wastewater generated
WWI Wastewater discharged to Inland waters
WWM Wastewater discharged to Marine waters
WAU (Water available for use) = ( A - RW - Ex + DsW + Im + RuW )
WAU (Water available for use) = ( C + L + Le + WW + CW )
C = Water available for use – leakage –returned waste water
TWC = C + losses by evaporation + discharges to sea