Latvian Environmental, Geology and Meteorology agency Future development scenarios for traffic system and air pollution in Riga city Iveta Steinberga La.

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Presentation transcript:

Latvian Environmental, Geology and Meteorology agency Future development scenarios for traffic system and air pollution in Riga city Iveta Steinberga La Rochelle (France) October 26-27, 2006

Latvian Environmental, Geology and Meteorology agency Motivation Stable and high NOx pollution levels: 1a – ug/m 3 ; 1 h – ug/m 3. Stable and high PM 10 pollution levels with lot of exceedances. Average number of exceedances for daily limit value – 120 times; 1 a – ug/m 3.

Latvian Environmental, Geology and Meteorology agency Monitoring network

Latvian Environmental, Geology and Meteorology agency Number of PM10 exceedances

Latvian Environmental, Geology and Meteorology agency Concentration distribution Particulate matter concentration distribution at station 18 Valdemara, Riga in 2005

Latvian Environmental, Geology and Meteorology agency Particulate matter hourly and daily variations at station 18 Valdemara, Riga in 2004

Latvian Environmental, Geology and Meteorology agency Particulate matter monthly variations at station 18 Valdemara, Riga in 2005

Latvian Environmental, Geology and Meteorology agency Particulate matter seasonal variations at station 18 Valdemara, Riga in 2005 Seasonal variations has been calculated for astronomical seasons, which are determined as follows: - winter – from December, 22 till March, 20; - spring – from March, 21 till June, 21; - summer – from June, 22 till September 22; autumn – from September, 23 till December, 21.

Latvian Environmental, Geology and Meteorology agency Particulate matter daily concentrations in days with and without precipitation at station 18 Valdemara, Riga in 2004.

Latvian Environmental, Geology and Meteorology agency Particulate matter daily exceedance cases in days with and without precipitation at station 18 Valdemara, Riga in 2004.

Latvian Environmental, Geology and Meteorology agency Particulate matter concentration dependency on wind speed during week days at station 18 Valdemara, Riga in 2004.

Latvian Environmental, Geology and Meteorology agency 1. The Air quality improvement plan is being implemented based on the information on exceedances and the potential risk of the pollutants as mentioned in the AQ directives and DD. 2. The program has been elaborated in 3 steps: assessment of existing situation; selection of instruments and arrangements for AQ improvement; setting up scheduled AQ improvement plan. Air quality improvement plan (1)

Latvian Environmental, Geology and Meteorology agency Air quality improvement plan (2) 3. The main tasks of the AQ monitoring for the period till 2009 are to lower the air pollution level to the level for human health protection and to implement preventive measures for places of satisfactory AQ but of potential danger in the future. 4. For implementing the target priorities were defined, mainly based on a cost effectiveness analysis, forecast of air quality changes (based on temporal dynamics of emission sources).

Latvian Environmental, Geology and Meteorology agency Air quality improvement plan (3) Different simulations were performed, based on information about geometry of emission sources, annual emissions and traffic intensity. Some of scenario's: 1. NO2 pollution simulation depending on type of source - traffic sources, stationary sources (point, area); 2. NO2 pollution simulation depending on economical activity - small furnaces (centralized heating and heating of private houses), steam shops, manufacturing companies, companies operating at Riga Free Seaport territory, traffic; 3. Benzene pollution simulation for different scenarios - increasing traffic intensity, quality of fuel, etc.

Latvian Environmental, Geology and Meteorology agency Activities for the air quality improvement (1)

Latvian Environmental, Geology and Meteorology agency Activities for the air quality improvement (2)

Latvian Environmental, Geology and Meteorology agency Activities for the air quality improvement (3)

Latvian Environmental, Geology and Meteorology agency Transport scenarios

Latvian Environmental, Geology and Meteorology agency NO2 hourly concentrations, ZERO scenario (do nothing)

Latvian Environmental, Geology and Meteorology agency PM10 yearly concentrations, ZERO scenario (do nothing)

Latvian Environmental, Geology and Meteorology agency Changes in traffic system

Latvian Environmental, Geology and Meteorology agency Modelling results

Latvian Environmental, Geology and Meteorology agency Thank you!