TITLE:
Natural Suitability Evaluation of Habitat Environment in Transition Zone Based on GIS Spatial Analysis Technology—Taking Beichuan County as an Example
AUTHORS:
Tao Liu
KEYWORDS:
Habitat Environment, Spatial Pattern, GIS, Beichuan County
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.9 No.8,
August
20,
2021
ABSTRACT: Analyzing
and measuring the spatial distribution pattern of human settlement environment
suitability in Beichuan County China is of great significance for optimizing
population distribution and promoting human development and environmental
protection. Based on the DEM data and other data of Beichuan County, this paper
uses GIS and ENVI software to extract four spatial distribution data of
vegetation coverage index, topographic relief, hydrological index and natural
disaster risk, and the spatial distribution pattern of natural suitability of
human settlement environment in Beichuan County was obtained through overlay
analysis. The results show: 1) Most of the areas with small topographic relief
are located in the southeast of the study area, which is New Beichuan County
and Anchang Town and Yong’an Town. The vegetation coverage index in the eastern
region is higher, while the vegetation coverage index in the western and other
high altitude regions is lower because there are more grasslands. 2) From the
perspective of spatial distribution, Beichuan County as a whole is rich in
water resources in the central and eastern part of the county, while the west
is short of water resources; Chenjiaba Township, Guixi Town and Old Beichuan
County are located on the fault zone with high natural disaster risk, the
natural disaster risk is high in Piankou Township and Xiaoba Town and Kaiping
Township Area. 3) The human settlement environment index of Beichuan county is
19.72 - 85.25; The natural suitability is the highest in the southeast,
followed by the central and western regions, and the worst is located in the
Piankou-Xiaoba and Old Beichuan-Guixi fault zones. 4) The general suitable area
in Beichuan County is the largest, accounting for 30.4% of the total area of
the study area. More suitable area ranked second, accounting for 29.33%; critical
fitness suitable area accounted for 17.87%; the area of suitable highly
suitable area accounted for 14.06%, and the unsuitable area accounted for
8.32%. Reasonable and efficient development and use of local resources is an
inevitable way for the sustainable development of Beichuan County.