Methoden voor de berekening van de emissies door mobiele ... - CBS

INTRODUCTION
The sources that cause emissions of environmental pollutants can roughly be divided into stationary
and mobile sources. Examples of stationary sources are installations for generating heat and energy,
such as central heating systems and electrical power plants, and installations where all kinds of
industrial processes take place. Mobile sources include various means of transport such as passenger
cars, light and heavy duty trucks, inland waterway vessels and aircraft, as well as mobile machinery
with combustion engines, such as agricultural tractors and forklifts.
This report describes the methodologies, emission factors and relevant activity data that are used to
calculate the emissions of environmental pollutants from mobile sources in the Netherlands. The
emissions are calculated annually by the Task Force on Transportation of the Dutch Pollutant and
Transfer Register (PRTR). The resulting emission figures for greenhouse gases are reported annually
in the National Inventory Report, whereas the air polluting emissions are reported in the Informative
Inventory Report. Both reports also give a brief description of the trends in emissions and the
methodologies used to calculate emissions. These methodologies and underlying data are described
in more detail in the present report.
The present report describes the methodologies used for calculating the emissions for the 1990-2010
time series that are published in 2012 and reported in the 2012 National Inventory Report (Van der
Maas et al., 2012) and the 2012 Informative Inventory Report (Jimmink et al., 2012). This report has
been compiled by the members of the Task Force on Transportation of the PRTR, which includes
members of Statistics Netherlands, the PBL Netherlands Environmental Assessment Agency, the
Netherlands Organisation of Applied Scientific Research TNO and the RWS Centre for Transport and
Navigation (DVS) of the Dutch Ministry of Infrastructure and the Environment. For a more general
description of the Dutch PRTR and the different task forces, please refer to the website of the PRTR
(www.emissieregistratie.nl).
The majority of the tables accompanying this report have been included in a separate Excel file.
References to these tables are printed in italics. In addition to the data for the emission calculation, the
tables also contain references and hyperlinks to the underlying data sources and data used for the
calculation of the 2010 emission figures.
Source categories and emission processes
One of the first steps in developing a methodology for estimating the emissions from mobile sources is
making an inventory of the various mobile sources. In broad terms, the following mobile source
categories are distinguished:
Road transport
Railways
National and international inland shipping (including recreational crafts)
Maritime shipping
Fisheries
Civil aviation
Non road mobile machinery (tractors, bulldozers, forklifts etc.)
Military shipping and aviation
For each source category, various emission processes are distinguished:
Combustion of motor fuels for propulsion;
Evaporation of motor fuels from the fuel system of vehicles;
Wear of tyres, brake linings and road surfaces due to road traffic;
Leakage and consumption of motor oil;
Wear of overhead contact lines and carbon brushes on trains, trams and metros;
Support processes on board ships (heating, electricity generation, refrigeration and pumping).
9