喀斯特地区土地生态适宜性评价:以贵阳市为例

为寻求促进喀斯特地区城市土地利用与生态系统保护协调发展的方法,在遥感技术和地理信息系统的支持下,以贵阳市为例,综合考虑工程地质、生态环境和社会经济等3个方面11个评价因子,通过Delphi法确定因子分值,利用层次分析法(AHP)计算因子权重,对喀斯特地区土地的生态适宜性进行了综合评价。结果表明:贵阳市建设适宜用地(含建成区)占市域面积4.62%,较适宜用地占19.99%,一般不适宜用地占23.25%,较不适宜用地占23.74%,最不适宜用地占17.71%,不可用地占10.69%。根据评价结果,为不同等级的用地类型提供了相应的建议,为保护喀斯特地区脆弱的生态系统、合理有效地利用土地资源提供了重要依据。

Evaluating the ecological suitability of city land in the Karst area:A case study in Guiyang city

The ecological suitability of land in Guiyang city was evaluated using GIS and RS systems to harmonize land use development and ecosystem protection in the Karst area.The multi factor-overlay method was used with 11 factors related to the geology,environment and economies.The values of these factors were determined using the Delphi method,with the weights of each factor determined using an analytical hierarchy process.Six classes of ecological suitability levels were generated with extreme suitability,moderate suitability,weak suitability,low suitability,poor suitability and no-development zones,with percentage of each zone being 4.62%,19.99%,23.25%,23.74%,17.71% and 10.69%,respectively.Different measures for different zones are suggested to protect weak ecosystems and reasonably and effectively use land in the Karst areas.