Evaluation of Rationality of Emergency Shelters Distribution through Application of Landscape Index
- 海洋环境－已发表论文 
Based upon analysis of spatial patterns along east-west and south-north extension shafts in Beijing City, China, the distribution rationality of emergency shelters was evaluated with gradient analysis as well as landscape index. The results showed that (1) the landscape index method can represent the overall distributional pattern of emergency shelters and its rationality; (2) emergency shelters in the city were generally highly fragmented, but had good connectivity and also had strong edge effects; (3) from the city center to the edges, emergency hedge place coverage did not vary with the change of distance between the shelter and the city center, while small patch quantity ratio, patch quantity, shape index, fragmentation degree and Euclidean nearest neighbor distance were subject to obvious gradient changes; (4) the main factor that influenced the coverage of emergency shelter and the distribution of patch areas and frequency was the distribution of large-scale patch of park nature. For cities with basically completed emergency hedge place system, under the limitation of area and coverage improvement, the rationality of space structure of the existing emergency shelters can be evaluated through the joint application of gradient analysis and landscape index. These parameters efficiently serve the adjustment and improvement of emergency shelters.