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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
1-10NAM (economic); mln Euros
11Water balance; mln m3
12 Emission balance; kg
13Water 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
nationaal
rijnwest
rijnmidden
rijnnoord
rijnoost
Economic production 1996-2000: agriculture
80
90
100
110
120
130
140
1996 1997 1998 1999 2000
nationaal
west
midden
noord
oost
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
x
x
x
x
x
x
x
x
x x x x x
x x x x x
x x x x x
x x x x x
x
x
x
x
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 x
x
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
wastewater
nutrients
heavy metals
GDP
GDP and environmental indicators : SCHELD
60
70
80
90
100
110
120
130
140
1996 1997 1998 1999 2000 2001
wastewater
nutrients
heavy metals
GDP
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
0
10
20
30
40
50
60
70
80
Agri Energ Chem Paper Food
Extraction(millions m3)
Value added(billions ofeuros)
Eco-efficiency branches of industryEco-efficiency branches of industry
0
10
20
30
40
50
60
70
80
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 industryindustry
Cost 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 provides
information 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)