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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

– Extrapolation– Coefficients– Surveys– ..........

Very often regardingwater uses

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Table 2. Usual Practices. • Predominant:

– 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

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Example: Spain (average)

-6000 -4000 -2000 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000

Cooling

Irrigation

Industrial

Urban

Returned water Consumptive water use

Source: CEDEX for JRC. “Towards a strategic and sustainable development of water resources” (European Comission, 2000)

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Source: CEDEX for JRC. “Towards a strategic and sustainable development of water resources” (European Comission, 2000)

Source: CEDEX for JRC. “Towards a strategic and sustainable development of water resources” (European Comission, 2000)

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Source: CEDEX for JRC. “Towards a strategic and sustainable development of water resources” (European Comission, 2000)

Source: CEDEX for JRC. “Towards a strategic and sustainable development of water resources” (European Comission, 2000)