In order to promote the urban public green space system development for emergency adapting function

according to evaluation index system concluded for emergency adapting function

on the basis of population density distributing and public green space buffer zone

the population service radiation capability for the urban public green space was comprehensively studied.The result shows that buffer zone of public green space is 421.96 km2 in the total urban planning extension

Beijing

covering 38% percent of the total urban planning area.However

the uncovered service space is 626.46 km2

with a population of 254.8 ten thousand in uncovered service space.The public green space buffer zone of Dongsi

Chaoyangmen

Dongzhimen street office in Dongcheng District and Chunshu street of Xuanwu District corresponding are 0.04%

21.22%

23.45% and 25.61% percent of the their total district areas

respectively.It is shown that the uncovered service space is relatively large and the population service radiation capability needs to be enhanced in the future.