This year’s project is the third year of a 3-year period continuity project. In year 2002 and 2003, The [TEDS5.1](Taiwan Emission Data System) version of Air Emission Inventory database based on year 2000 had been established and the authority about responsibility of the improvement for more uncertainty emission sources had been planning in year 2003 too. One of this year’s works of the project is to audit the data of area emission sources reported from local government and assist them to resolve the problems during establishing the databank. Besides that, 360 samples of silt loading for road dust are conducted in this year’s project. In addition, the main works of the project still include：reviewing for part of the emission sources with extraordinary emissions, preparing the guideline for Quality Assurance of Emission Inventory. The purpose of above works is to reduce the uncertainty of the emission inventory gradually. In the application of the emission data, the works are covering: establishment of monthly activity indicators and estimation for the trends of monthly emissions, which could assist on the analysis for the cause of short-term air quality deterioration, setting up the query function on the web-page of stationary sources management system of TEPA, calculating and reviewing for the air pollution degradation based on the update version of air emission inventory, and providing the required information to the Directorate General of Budget, Accounting and Statistics (DGBAS) of Executive Yuan for editing the Green GNP (Gross National Product) report of year 2004.

Silt Loading,Quality Assurance guideline,monthly activity indicator,Green GNP,Air Pollution Degradation