Regional Land Use and Ecological Security Assessment Based on GIS: A Case Study of Guiyang City

Abstract

Ecological security research is a multidisciplinary field encompassing environmental science, geography and ecological ecology. This study selected Guiyang City as a case study for ecological security research. A total of 16 indicators related to ecological security were selected, and the PSR model was employed to construct an ecological security evaluation system for Guiyang City’s land use, thereby conducting an analysis of the city’s land ecological security. The results indicate that: (1) The surface landscape of Guiyang City is predominantly characterised by woodland and arable land. Over the past 15 years, land use in Guiyang has been favourable; whilst the area of land designated for construction has continued to increase, the area of arable land has shifted from a declining trend to an upward one. There have been no significant changes in water bodies or unutilised land, whilst the trend in woodland has been one of initial increase followed by a decrease. (2) Overall, Guiyang’s ecological condition is sound, but its ecological security coefficient is gradually declining. The ecological security rankings for Guiyang in 2000, 2010 and 2015 were as follows: medium-high security index > high security index > medium security index > low security index > low-level security index.