Primarily discussion on structuring technology of buffer zone in eco-stream;

A gradient analysis based on the buffer zones of urban landscape pattern of the constructed area in Guigang City,Guangxi,China;

Discussion on the necessity of construction of buffer zone from the vegetation point.;

Effects of pollutant loads and vegetation biomass of buffer strips on runoff purification;

Buffer strips could efficiently control the loss of soil and nutriment, while its construction and management was essential in eco\|enivronment construction.

Removal of Runoff Pollution by Different Grass-buffers

Through building five buffers from inner to outer parts around Beijing, this paper discusses the pattern of built-up areas of Beijing, and explains the pattern from the natural, historical, and economic aspects.