The ecological suitability evaluation on urban expansion land based on uncertainties;

This paper analyses the growth elastic coefficient and power exponent rule of the growth of China s urban land use,finding that lower grade of land use benefit and faster expansion are major characters;The paper finds also the growth of fixed assets investment and population of the whole country are driving forces of urban land expansion in China.

Based on the research on the urban land expansion and the ecosystem service value changes of rapid urbanization area Qixia District,the impacts and effects of urban land expansion on ecological environment were analyzed.

Rapid economic development has happened in the east coast of China since the Reform and Opening-up,at the same time,following a remarkable expansion of construction land.

The control on the standards of urban construction land is one of the most important traditional tasks of urban planning.

The purpose of the paper is to analyze differences of urban construction land.

This study appraises the recent integrated benefit in use of urban construction land in every province,from angles of economic benefit,social benefit,environment benefit and so on.