基于GIS的兰州新区土地利用变化及其对生态系统服务价值的影响

Research on the ecosystem service value based on GIS and land use changes in Lanzhou New Area

基于地理信息系统和土地利用数据分析2010-2020年兰州新区的土地利用变化过程及其与生态系统服务价值的关系.结果表明,2010-2020年,兰州新区的耕地、林地、草地和未利用地面积分别减少143.81、13.87、108.39和8.26 km^(2),建设用地和水域面积分别增加272.23和2.10 km^(2).土地利用幅度变化较大,建设用地的面积增速最快;草地对生态系统服务价值的贡献度最大且敏感性最高;调节服务在服务价值中占据主导地位.土地利用变化是生态系统服务价值发生变化的原因,兰州新区快速的城市化进程和经济发展政策是土地利用时空格局演变的重要驱动因素.

Based on geographic information system and land use data,the land use changing process and its relationship to the ecosystem service value in Lanzhou New Area from 2010 to 2020 were analyzed,and the results showed that from 2010 to 2020,the areas of cultivated land,forest land,grassland and unused land decreased by 143.81,13.87,108.39 and 8.26 km^(2) respectively,and construction land and water area increased by 272.23 and 2.10 km^(2) respectively.Land use changes were relatively large,of which the growth rate of construction land was the fastest;grasslands had the largest share of contribution to the ecosystem service value with the highest sensitivity;regulation services dominated the service value.Land use changes were the main reason for the changes in the ecosystem service value.The analysis showed that the rapid urbanization process and economic development policies of Lanzhou New Area had been important driving factors for the evolution of land use's spatiotemporal pattern.