The Technical Support System of Ambient Air Quality Management

in Tianjin

TIANJIN

One of the important economic centers and ports in the north of China

Total area ： 11919 km2

Built-up area ： 371 km2

Population: 10 millionBinhai new area of Tianjin (BNAT) ： 350km2

Bohai

大港区

汉沽区

东丽

津南 塘沽区

开发区BNAT is located at Bohai Bay Rim city belt with an area of 2270 km2

The area of planed key construction: 350km2.

position of BNAT

保税区、天津港

• Background

• Objectives and meanings

• Content

• Technologies

• Basis

Background

• Tianjin was granted the title of “National Model City of Environmental Protection” in 2005

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The percentage of days attaining grade II of the ambient air quality standard during 2002-2005

Background

• Under the rapid economic development and increasing energy consumption, the Tianjin air quality is fragile.

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耗煤量

The coal consumption during 2000-2004

The haze haunted the sky of Tianjin under the disadvantageous meteorologic conditions.

Tianjin had a bad air quality on 2-7 November 2005. • 1 day of heavy air pollution with API of 340 • 2 days of moderate-heavy air pollution with API of 267-279• 2 days of light heavy air pollution with API of 191-155• 1 day of slight air pollution with API of 113

Background

On 3-4 November 2005

Beijing

Tianjin

Shijiazhuang

API: 279-340 ， Heavy or moderate-heavy air pollution

The regional characteristic of the heavy air pollution

The smoke pollution caused by coal burning hasn’t resolved yet, the urban air pollution has begun to transform from smoke-type to complex-type, which is marked by the emergence of new pollutants such as aerosols, fine particle matters, ozone and so on.

Background

TIANJIN CENTRAL URBAN AREA

Background

北辰科技园测点二氧化氮日变化曲线图

The daily change of NO2 concentration

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小时值标准

standard

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mg/m3浓度（ ）

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Background

Ozone pollution is emerging with the rapid increase of vehicle ownership

05.9.7 臭氧日变化曲线图

standard

Project meanings

• It is a big challenge for Tianjin to keep the good urban air quality

• Maintain the model city of environmental protection• Continuously improve the urban air quality• Realize the plan of “Blue Sky Project”• Ensure the constant rate of attaining standard• Provide the environmental administrative departments with

scientific and accurate pre-warning pollution information• Endeavor to fulfill the goal of ecological model city

• Meet the scientific, informative, quantitative and legal requirements of air quality management.

• Establish an integrated system of air quality management involved environment monitoring, forecast and pre-warning and environmental capacity match.

Project meanings

Main content

• Establish Tianjin GIS dynamic assessment database system of air pollution sources.

• Integrated meteorological and geographic factors into the model

• Establish air quality decompose system in order to provide visualized model system of air quality picture

• Establish Tianjin regional ambient air quality and capacity match management system to provide technical support for the air quality management during the 11th Five-Year Plan period

• Establish Tianjin ambient air quality pre-warning and response system

The establishment of GIS dynamic management system of air pollution sources

1. Survey on the stationary sources and the establishment of emission inventory for the stationary sources

2. Survey on the mobile sources and the establishment of emission inventory for the mobile sources

3. Survey on the opening sources and the establishment of database for blown-up dusts as one of the opening sources

Project Content

Projects Content

The establishment of integrated system of meteorological data

The collection of meteorological dataThe integrated system of meteorological data

1. Integration and analysis of various meteorological data ；2. Identification of the weather type affecting the urban ambient air

quality；3. The systematic analysis on the air disperse capacity of Tianjin

Project Content

The establishment of air quality explain and analysis system

a. The establishment of air quality

monitoring database b. Weather-Air Quality model establishment

By analyzing the weather characteristic of the heavy air quality day (e.g. the haze weather), the countermeasures can be selected under such weather condition.

Project Content

The regional ambient air quality capacity and total amount distribution management system

• Based on the dynamic ambient air capacity, considering the allowable emission amount of various pollution sources under a certain meteorological conditions, a reasonable pollution emission distribution can be designed from the autonomous adjustment of pollution sources of the model.

Project Content

emission < capacity

Regional emission of the pollution sources

Pollution sources

distribution

Pollution sources adjustment measures

Emission of the pollution sources

No pollution adjustment measures

are needed

emission > capacity

Air quality mimics after the adjustment of pollution

sources

Does pollution still exist?

Yes

NoDecided pollution sources

adjustment measures

Economic factors

Project Contentweather classification

Capacity and total

amount model

Different environmental capacity

under different weather

Tianjin air quality pre-warning system

1. Identify air pollution thresholds under certain weather conditions

2. Find out the major pollution sources by operating the model

3. Provide plan of prevention and control of pollution risk

Project Content

Fast diagnosis system of air pollution

Air quality monitoring

Air quality forecast

Weather – air quality modelIdentification of air pollution threshold

Pre-plan of prevention and control of pollution risk

Fast diagnosis system of air pollution

Fast forecast of responding air quality

Project Content

Project basisMajor research projects related to ambient air quality in recent years ：

• The research on forecast of Tianjin air pollution ；• The research on PM source apportionment and environmental in

formation management system ；• The pilot research on assessment methods of urban vehicle em

ission pollution ；• The application research of air quality forecast methods in

Binhai area；• The research on assessment of the implementation effects of

Tianjin “Blue Sky Project”

The ongoing researches related to ambient air pollution control

• Tianjin air pollution risk assessment, pre-warning and forecast system

• The research on Tianjin ozone pollution level and measures of prevention and control

• Main technical requirements: • Pollution source inventory and the method for establishing

sources database ；• The assessment methods and application of technologies