Datum Emissions to water in the Netherlands Richard van Hoorn, Centre for Watermanagement Joost van den Roovaart, Deltares 11-12 September 2008

datum

Emissions to water in the Netherlands

Richard van Hoorn, Centre for Watermanagement

Joost van den Roovaart, Deltares

11-12 September 2008

12 september 2007Positionering, branding en huisstijl Deltares - 2

Content

1 The Dutch Pollutant Release and Transfer Register

2 Presentation of the Dutch SoE data

3 Specific problems concerning the SoE data request

4 Some general dilemma’s concerning gathering data of emissions and discharges to water


1. The Dutch Pollutant Release and Transfer Register


Dutch PRTR (1)

. Started in 1978

. A lot of organisations closely work together

. Covering the large watersystems, rivers, coastal waters and the waterboards

. Data is used for national, international and regional reports

. Updates every year: 1 new year added + standard 1990/1995/2000/2005

. Releases of 350 pollutants to air, water and soil

. Both point sources: UWWTP (400) and industry (600) and diffuse sources (60)

. Covering emissions from the source, loads to the sewer system and discharges to the surface water


Dutch PRTR (2)

. Spatial allocation of the emissions, different regional reports possible

. Information is stored in a central database

. Consistent: corrections of old years

. Transparant: description of quantification methods (fact sheets)

. Free accesible on internet: www.prtr.nl

. Short presentation today/tomorrow?


Main schedule

Industry

Refineries

Energysector

Traffic andTransport

Consumers

Construction

Waste disposal

Trade, services and government

Agriculture

Nature

Surface w

aters

Discharge to air

Air

Agricultural soils

Natural soils

Transboundary

transfers

Discharge to soil

Sewage systems

Deposition

on sewers

Deposition on surface waters

Run-off and leaching

Sewers

UWWTP

Load to sewers

Discharged load to surface waters

Untreated sewage

Rainwater drains

Stormwater overflows

Effluents

Transboundary

rivers

Legend

Sources Compartment Discharges Transfers Transboundary transfers and rivers

Sewage sludges


2. Presentation of the Dutch SoE data


Information reported

. Selection of 12 substances: total P, total N, COD, BOD Cd, Cu, Hg, Pb, Ni, Zn fluoranthene, benzo(a)pyrene

. Only one year: 2005

. No river loads

. Reported loads are discharges to water, no retention and other processes

. Sources on aggregated level as requested: diffuse sources: 7 groups point sources: 4 groups UWWTP point sources: 2 groups industry (IPPC, non-IPPC)


3. Specific problems concerning the SoE data request


Specific problems on SoE request

. Legislative requirements or voluntary reports

. Selection of the data available

. Quality of the data

. Source categories, esp. diffuse sources

system or schedule of the emission sources sources don’t exclude each other: atmosferic deposition/urban diffuse agriculture and background definitions not quite clear why not use the NACE-code (for industry) and the NOSE-P or SNAP-code for diffuse sources? a well-defined standard source-codelist combined with a schedule with relations, compartments and pathways is an essential basis we need


4. Some dilemma’s concerning gathering data of emissions

and discharges to water


Diffuse sources become relatively more important

0

500

1000

1500

2000

2500

1975 1980 1985 1990 1995 1999

To

n/ja

ar

diffuse sources

eff luents UWWT's

industry (direct)


Diffuse sources are not easy to handle

. monitoring diffuse sources in general is not easy

. often a mix of measurements, estimations and model calculations

. esp. the remaining diffuse key sources are difficult to monitor

. often connected to different compartments

. other parties involved (institutes, ministries)

. the need for harmonization is obvious


Focussing or not?

. focus on the major problem substances

. ..on the key sources of those substances..

. ..and to reduce the largest uncertainties in quantification methods

. on the other hand: we don’t want to focus too narrow

. new substances, problems change, new WQ targets

. try to find a balance


Transparancy of the data and quantification methods

. we have to because of the Aarhus-protocol and E-PRTR

. we need to within the River Basins

. transparancy improves the quality of the methods

. communication, exchange information, review

. in the Netherlands finalized detailed descriptions of the quantification methodes of diffuse (and point) sources: 50 “fact sheets” with a lot of information


Fact sheets

. description of the source (or group of sources)

. explanation of the estimation method

. emission factors

. statistical information used

. measures and effects

. calculated emissions at the source

. distribution to different compartments and pathways

. spatial allocation

. changes compared to previous methods

. quality of the method and suggestions for improvement

. contact person

. references


Quality

. classification in 5 categories: A-E

. A: based on a lot of measurements on representative locations

. E: based on a technical calculation based on assumptions

. based on the CORINAIR methods (CORe emission INventories AIR)

. classification of: the emission factors, the statistical data, distribution to the compartments and pathways, spatial allocation

. gives indication what are the weakest parts in the method and gives direction for improvements in the methods

. fact sheets may be usefull for others: we try to find money for translation in English

Documents

Datum Emissions to water in the Netherlands Richard van Hoorn, Centre for Watermanagement Joost van den Roovaart, Deltares 11-12 September 2008