Evaluating the eclogical condition in Shenzhen city, China, using a quantitative model

To evaluate the urban ecosystem condition quantitatively is still a big issue remaining to be solved. This contribution developed a quantitative method, called Ecoservice Radiance Model (ERM), to evaluate ecological condition in built area. As the evaluation index, ecoservice which was provided by eco-land was considered distance attenuated and can be radiated to the around built area according to distance. Through a case study in Bujiriver basin in Shenzhen, China, it could be concluded that the ecoservice can be allocated to built area efficiently and the allocation result can reflect the role of small eco-land in improving the ecological condition of built area.