NAMWA The Dutch system of Water AccountsThe Dutch system of Water Accounts

Sjoerd Schenau - CBS (National Accounts)Rob van der Veeren - RIZA

Roy Brouwer - IVM

StructureStructure

– Introduction to NAMWAIntroduction to NAMWA– Work on NAMWA in the Work on NAMWA in the

NetherlandsNetherlands– Results and indicatorsResults and indicators– Future workFuture work

What is NAMWA?What is NAMWA?

System of National Accounts (SNA)System of National Accounts (SNA)

National Accounting Matrix including National Accounting Matrix including Environmental Accounts (NAMEA)Environmental Accounts (NAMEA)

National Accounting Matrix including National Accounting Matrix including Water Accounts (NAMWA)Water Accounts (NAMWA)

Work on NAMWA in the Work on NAMWA in the NetherlandsNetherlands

– Based on an experimental NAMWA published in 1996Based on an experimental NAMWA published in 1996– Collaboration between RIZA and Statistics Collaboration between RIZA and Statistics

NetherlandsNetherlands– 2002: Extension of original NAMWA2002: Extension of original NAMWA– 2003: further extension: addition of more pollutants, 2003: further extension: addition of more pollutants,

more detail for river basinsmore detail for river basins

Scale: National and River BasinsScale: National and River Basins

Structure NAMWA

NAMWA exists of three parts:

1. Economic accounts, primarily based on the national accounts (euros)

2. Emission accounts, based on emission registration (kg)

3. Water extraction and discharge account, based on the water survey (m3)

Economic parameters

– National: overview of the expenses (vertical) and receipts (horizontal) with specific attention to water (waterboards, sewage taxes etc.)

– Regional: production, use, value added, number of employees per industry

NAMWA : the matrixNAMWA : the matrix

Account nr 1-10 11 12 13 14

1-10 NAM (economic); mln Euros        

11 Water balance; mln m3        

12 Emission balance; kg        

13 Water balance; mln m3        

14 Emission balance; kg        

Distribution of economic value added generated in the various river basins in the Netherlands

50%

8%

10%

5%

21%

3%

3%

Rhine west Rhine mid Rhine east Rhine north Meuse Scheldt Ems

Economic production 1996-2000

80

90

100

110

120

130

140

1996 1997 1998 1999 2000

nationaalrijnwestrijnmiddenrijnnoordrijnoost

Economic production 1996-2000: agriculture

80

90

100

110

120

130

140

1996 1997 1998 1999 2000

nationaalwestmiddennoordoost

Emission accounts

– National en regional emission registration

– overview of the production and absorption of emissions by the industries

– 78 substances: o.a. P, N, heavy metals, pesticides etc.

Origin of pollutants

P N Heavy metals Waste water

Consumers x x x x x x x x

Producers–Agriculture–Fisheries–Mining–etc

xxxx

xxxx

x x x x xx x x x xx x x x xx x x x x

xxxx

Input from abroad x x x x x x x x

Total x x x x x x x x

Destination of pollutants

P N Heavy metals Waste water

Absorption x x x x x x x x

Export abroad x x x x x x x x

Env. indicators–eutrophication–Waste water–Heavy metals

x x

x x x x xx

Total x x x x x x x x

GDP and environmental indicators: national

80

85

90

95

100

105

110

115

120

125

130

1996 1997 1998 1999 2000 2001

wastewaternutrientsheavy metalsGDP

GDP and environmental indicators : SCHELD

60

70

80

90

100

110

120

130

140

1996 1997 1998 1999 2000 2001

wastewaternutrientsheavy metalsGDP

Distribution emissions over the industries (2000)

0%

20%

40%

60%

80%

100%

As Cd Cr Cu Hg Pb Ni Zn P N

other

transport

environmental services

industry

agriculture

households

Water accounts

– Water survey from the CBS (national and regional)

– every 5 years

– production and use of fresh water (ground-, surface- en drinking water) per NACE

Use of salt surfacewater

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

refineries Chemical industry Basic metalsmanufactering

electricity supply

mln

m3

1996

2001

Use of water in 2001

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

tapwater sweetgroundwater

brackishgroundwater

sweet surfacewater

saltsurfacewater

SCHELD

MEUSE

EEMS

MID

EAST

NORD

WEST

Results so far

– National NAMWA for 1996 t/m 2001

– Regional NAMWA for 1996 t/m 2000

IndicatorsIndicatorsEco-efficiency:Eco-efficiency: - value added and water extraction by industry- value added and water extraction by industry - value added and emissions to water by - value added and emissions to water by

industryindustry

Eco-efficiency branches of Eco-efficiency branches of industryindustry

01020304050607080

Agri Energ Chem Paper Food

Extraction(millions m3)

Value added(billions ofeuros)

Eco-efficiency branches of industryEco-efficiency branches of industry

01020304050607080

Agri Energ Chem Trans Other

Emission (kg tons N)Value added(billions of euros)

IndicatorsIndicatorsEco-efficiency:Eco-efficiency: - value added and water extraction by industry- value added and water extraction by industry - value added and emissions to water by - value added and emissions to water by

industryindustryCost recovery rates based on:Cost recovery rates based on: - Production costs water services- Production costs water services - Environmental taxes related to water- Environmental taxes related to water

Total costs and revenues of the water service wastewater treatment (in million euros)

0

200

400

600

800

1000

1200

1400

1996 1997 1998 1999 2000 2001

Costs Revenues

Usefulness of NAMWA for WFD (1)Usefulness of NAMWA for WFD (1)NAMWA provides a NAMWA provides a consistentconsistent integrated economic- integrated economic-

environmental accounting framework which providesenvironmental accounting framework which providesinformation about:information about: - Intensity of water use by branches of industry- Intensity of water use by branches of industry - The physical flows of supply of water services- The physical flows of supply of water services - Production costs of water services- Production costs of water services - Environmental taxes related to water- Environmental taxes related to water

at National and River Basin levelat National and River Basin level

Usefulness of NAMWA for WFD (2)Usefulness of NAMWA for WFD (2)

Hence NAMWA provides indicators about:Hence NAMWA provides indicators about:

- Extent and relative significance of - Extent and relative significance of water serviceswater services

- Extent and relative significance of - Extent and relative significance of water usewater use

- Cost recovery- Cost recovery- Application of Polluter Pays Principle- Application of Polluter Pays Principle

Future workFuture work

• NAMWA as a regular ‘product’ from NAMWA as a regular ‘product’ from 2002 onwards2002 onwards

• Calculate data for 1990-1995Calculate data for 1990-1995• Waterbalance every yearWaterbalance every year• Composition of indicatorsComposition of indicators• Publication of the data (also on the Publication of the data (also on the

internet)internet)