摘要
研究土地利用变化与生态系统服务价值(ESV)的演变对优化喀斯特脆弱山区的土地资源配置和推进生态恢复具有重要意义。以贵州省瓮安县为例,利用2001年、2011年、2019年3期遥感影像数据,通过CA-Markov模型预测2027年土地利用格局,定量分析研究区2001—2027年土地利用和ESV的时空演变趋势。结果表明:瓮安县土地利用类型以林地和耕地为主,耕地向林地的转移较为剧烈,林地和建设用地面积持续增加,建设用地和水域的动态度最大;ESV总体呈上升趋势,耕地向林地转移是ESV增加的主要贡献项,ESV增加区域主要发生在瓮安县西部和东北部地区,未来ESV低值区仍分布在中部城镇地区;服务类型产生的ESV主要以土壤形成与保护服务为主,其次为水源涵养服务和生物多样性保护;林地和耕地是引起研究区ESV变化的敏感因子,研究区ESV对改进的价值系数缺乏弹性。研究期内瓮安县土地利用结构变化显著,生态系统服务价值明显提升。
The study of land use change and the evolution of ecosystem service value(ESV)is of great significance for optimizing the allocation of land resources in fragile karst mountainous areas and realizing ecological restoration.Taking Weng’an County in Guizhou Province as an example,the remote sensing image data from 2001,2011,and 2019 were used to predict the land use pattern in 2027 through CA-Markov model,and quantitatively analyze the spatio-temporal evolution trend of land use and ESV in the study area from 2001 to 2027.The results showed that the land use types in Weng’an County were mainly forest land and arable land.The transfer of arable land to forest land was relatively intense.The area of forest land and construction land continued to increase,and the dynamic degree of construction land and water body was the largest;ESV was generally increasing,and the transfer of arable land to forest land was the main contributor to the increase of ESV.The increase of ESV mainly occurred in the western and northeastern regions.In the future,low ESV areas would still be distributed in the central urban areas;ESV generated by the service type was mainly based on soil formation and protection services,followed by water sources conservation service and biodiversity protection;forest land and cultivated land were sensitive factors that caused ESV changes in the study area,and ESV of the study area was inelastic to improve the value coefficient.During the study period,the land use structure of Weng’an County had changed significantly,and the ESV increased significantly.
作者
李文芳
任晓冬
刘弋菱
王霄念
肖杰
LI Wenfang;REN Xiaodong;LIU Yiling;WANG Xiaonian;XIAO Jie(National Engineering Research Center for Karst Rocky Desertification Control,Karst Research Institute of Guizhou Normal University)
出处
《环境工程技术学报》
CAS
CSCD
北大核心
2023年第1期368-376,共9页
Journal of Environmental Engineering Technology
基金
国家重点研发计划项目(2016YFC0502607-03)。
