The Forecasting and Assessing Method for Urban Sustainable Development Tendency

The sustainable development of urban eco-system mainly focuses on harmony development between environment and economy, which can reveal the macro and micro development trend to server on adjusting and controlling. On the basis of selecting indicators, the GM(1,1) model was adopted to forecast the future situation of each indicator from 2003 to 2005 with the statistic data from 1998 to 2002 of Tianjin city, results' error percent can be accepted by comparing with the statistic data. Coordinated index and coordinated development index are widely used for assessment of the regional sustainable development, by determining the assessment criteria with the level all over the world, two levels was selected to assessment sustainable development of the Tianjin city. Results show the forecasting and assessing methods for urban sustainable development tendency were very useful, the conclusion can be easily interpreted and understand.