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- Title
改进G2SFCA 的深圳市室内应急避难场所 空间可达性研究.
- Authors
卢永华; 李爽
- Abstract
Taking Shenzhen city as study area,on the basis of the gravity two-step floating catchment area method (G2SFCA) considering the distance attenuation effect, the Huff arithmetic, demand point loca- tion as well as terrain were introduced into the model. G2SFCA was improved from three aspects: competi- tion of supply point, location of demand point and optimization of road network distance. An improved G2SFCA is proposed to study the spatial accessibility of indoor emergency shelter in Shenzhen city. Experi- mental results show that the improved G2SFCA can not only reveal the indoor spatial accessibility of emer- gency shelter in various communities of Shenzhen city, but also effectively reflect the spatial matching law between accessibility and population density distribution, which is more realistic than other models. The re- sults of statistics and analysis on the quantity, population accommodation and spatial accessibility of indoor emergency shelters are true and reliable. The relevant conclusions can be used for reference for future disas- ter prevention work and space planning of indoor emergency shelter in Shenzhen city.
- Subjects
SHENZHEN (Guangdong Sheng, China : East); WATERSHEDS; EMERGENCY management; POPULATION density; ARITHMETIC; GRAVITY
- Publication
Geomatics & Information Science of Wuhan University, 2019, Vol 44, Issue 9, p1391
- ISSN
1671-8860
- Publication type
Article
- DOI
10.13203/j.whugis20180456