Links, communalities and differences between SEEAW and Eurostat/OECD-JQ and UNSD Water Questionnaire

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Links, communalities and differences between
SEEAW and Eurostat/OECD-JQand UNSD Water
Questionnaire
MEDSTAT II Environment Sector / UNESCWA /
UNSD Joint Sub-regional Training Session on the
System of Environmental-Economic Accounting for
Water (SEEAW) Amman, March 10-13, 2008 Michael
Nagy
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Table of contents

• History of environment/water statistics
• Overview on statistical tables
• UNSD-Water Questionnaire 2006
• Eurostat/OECD Joint Questionnaire on Inland
  Waters
• SEEAW Standard Tables and Supplementary Tables
• Links and communalities between the 3
  questionnaires in the order of UNSD-WQ tables
• Conclusions

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History of environment/water statistics

• Early 1970s Environment statistics compiled in
  some countries (regulatory and administrative
  purposes)
• 1980s OECD started data collection through
  questionnaires
• 1990s Environmental-Economic Accounting started
• 1993 SEEA
• SEEA 2003 (revised version)
• 2007 SEEAW as interim standard

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UNSD-Water Questionnaire Tables
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Eurostat/OECD-JQ IW Tables
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SEEAW Tables

• Standard Tables
• Standard physical supply and use tables (PSUT)
• Emission accounts
• Hybrid supply and use tables
• Asset accounts
• Supplementary tables
• PSUT breakdown of use-types and returns (e.g.
  mining water, irrigation water, cooling water,)
• Flows of water within the economy
• Emission accounts Emission breakdown to
  surfacewater / groundwaters amounts of sludge
• Quality accounts
• Social indicators e.g. sustainable access to
  improved water sources

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UNSD-WQ W1 Renewable Freshwater Resources
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Hydrological Cycle (Eurostat / OECD)
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UNSD-WQ W1 Renewable Freshwater Resources

• Corresponds to Eurostat/OECD-JQ T1 Freshwater
  resources
• /- identical variables
• slightly different terminology, e.g.
• Inflow of surface and groundwaters (UNSD) ??
  Actual external inflow (Eurostat/OECD)
• Outflow of surface and groundwaters (UNSD) ??
  Total actual outflow (Eurostat/OECD)
• UNSD-WQ less variables
• Eurostat/OECD Supplementary tables on inflow and
  outflow
• Link to SEEAW-Table asset accounts
• Increases in stocks can be taken from W1 (or T1)
  Precipitation, Inflows
• Decreases in stocks can be taken from W1 (or T1)
  Outflow, Actual evapotranspiration
• Water abstraction can be taken from UNSD-WQ W2
  (Net water abstraction)
• UNSD and Eurostat/OECD deal with renewable water
  resources only, no stocks

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UNSD-WQ W2 Water Use Balance
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UNSD-WQ W2 Water Use Balance
Water flow schema of Eurostat/OECD-JQ on Inland
Waters
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UNSD-WQ W2 Water Use Balance

• Corresponds to Eurostat/OECD-JQ T Water Use
  Balance
• Identical concept
• Consumptive water use Freshwater abstraction
  leakages wastewater generation
• Water consumption Consumptive water use
  Discharges to the sea
• Links to SEEAW PSUT (Columns Total use, Total
  supply)
• No disaggregation for different industries in W2
• UNSD-WQ data can be used to compile total
  abstraction and total returns
• slightly different concept regarding re-used
  water
• Main differenceWater used for hydropower is NOT
  COVERED by UNSD/Eurostat/OECD Water
  Questionnaires

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UNSD-WQ W3 Freshwater abstraction
disaggregation of same variables for surface
water and groundwater
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UNSD-WQ W3 Freshwater abstraction

• Corresponds to Eurostat/OECD-JQ T2 Annual
  freshwater abstraction by source
• Same structure and variables
• Eurostat/OECD has additional variables
• Breakdown of cooling water of manufacturing
  industry
• Supplementary table Other sources of water
• Links to SEEAW physical use table
• Similar breakdown into industries and households
• UNSD-WQ data can be used to complete part
  Abstraction from the environment

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UNSD-WQ W4 Water supply industry (ISIC 41 ?
ISIC 36)
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UNSD-WQ W4 Water supply industry (ISIC 41 ?
ISIC 36)

• Corresponds to Eurostat/OECD-JQ T 3.1 - Water use
  by supply category, part Public water supply
  and Losses during transport
• Eurostat/OECD-JQ has breakdown for cooling water
  of manufacturing industries
• Links to SEEAW PSUT
• Use data to compile figures for Use of water
  received from other economic units
• Note Flows within ISIC 41 (36) are not covered
  by UNSD/Eurostat/OECD
• Link to SEEAW social indicators
• Consider data on Population supplied in the
  compilation of sustainable access to an improved
  water source

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UNSD-WQ W5 Total water use
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UNSD-WQ W5 Total water use

• No directly corresponding table in
  Eurostat/OECD-JQ
• Self supply (T3.1) Total water use (W5) -
  Freshwater abstraction (W3)
• Eurostat/OECD-JQ has a breakdown for cooling
  water of manufacturing industries
• Link to SEEAW PSUT
• Equal to total use of water per industry (use
  table)
• Note Flows within same industries are not
  covered by UNSD/Eurostat/OECD

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UNSD-WQ W6 Wastewater treatment facilities
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UNSD-WQ W6 Wastewater treatment facilities

• Corresponds to
• Eurostat/OECD-JQ T 5 Treatment capacity of
  wastewater treatment plants in terms of BOD
• Eurostat/OECD-JQ T 6 Sewage sludge production
  and disposal
• Differences
• UNSD-WQ effluent BOD is missing
• Eurostat/OECD-JQ additionally tertiary
  treatment, more about independent treatment (e.g.
  capacity and effluent BOD), concept of Other
  wastewater treatment, sludge disposal routes
• 1 link to SEEAW tables Sewage sludge quantity

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UNSD-WQ W7 Population connected to wastewater
treatment
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UNSD-WQ W7 Population connected to wastewater
treatment

• Corresponds to Eurostat/OECD-JQ T4 National
  population connected to wastewater treatment
  plants. JQ more detailled
• Tertiary treatment
• Other wastewater treatment
• Link to SEEAW
• Data should be considered in the calculation of
  access to improved sanitation

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Eurostat/OECD-JQ Table 7 Generation and
discharge of waste water
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Eurostat/OECD-JQ Table 7 Generation and
discharge of waste water

• Covers all wastewater flows from generation to
  discharge per type of industry
• Parameters
• Volume
• BOD
• N
• P
• Suspended solids
• Heavy Metals
• No corresponding UNSD-WQ table
• Can be used as basis for calculation of SEEAW
  Emission Accounts

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CONCLUSIONS I

• UNSD-WQ and Eurostat/OECD-JQ use identical
  concepts
• Can be used complementary to provide a global
  picture
• Eurostat/OECD-JQ is more disaggregated
• Eurostat/OECD-JQ deals additionally with
  industrial wastewater and non-point sources
• Eurostat/OECD-JQ deals additionally with WW
  quality aspects
• Some terms are slightly different
• Main difference UNSD Definition of wastewater
  includes cooling water whereas Eurostat/OECD-JQ
  excludes cooling water from its wastewater
  definition

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CONCLUSIONS II

• UNSD-WQ/Eurostat/OECD-JQ versus SEEAW
• SEEAW follows strictly ISIC classification
  UNSD-WQ/Eurostat/OECD-JQ relate more to ownership
  (e.g. public water supply, urban wastewater
  treatment)
• Concept total supply in SEEAW is different from
  supply in UNSD-WQ/Eurostat/OECD-JQ
• SEEAW includes the use of water in hydroelectric
  power generation
• SEEAW concept of soil water does not exist in
  the other questionnaires
• No economic information in UNSD-WQ/Eurostat/OECD-J
  Q

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Conclusions III

• UNSD-WQ and Eurostat/OECD-JQ are an important
  data basis for compilation of SEEAW
• Data have to be used carefully, since not all
  definitions and concepts are harmonized yet
• Questionnaires are currently brought in line
  (step by step)
• Terminology
• Definitions
• Concepts and classifications

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Thank you very much for your attention!

• michael.nagy_at_umweltbundesamt.at