摘要
以延安市城郊区24个乡镇1984～2002年土地数据为依据,在分析研究区土地利用数量和结构变化特点的基础上,运用国内外学者对生态价值估算的方法与模式,结合延安市城郊区的具体情况对估算方法进行修正,然后对研究区研究时段内各年度的生态系统服务功能经济价值进行了估算,并以1984年为基准测算了土地利用类型的数量和结构变化所引起的生态系统服务功能经济价值变化情况,分析了其变化的时段特点及变化原因。研究表明:1984～2002年,延安市城郊区土地利用变化所产生的环境响应总体来说是积极的,生态系统服务功能经济价值年度总量在波动中提高;退耕还林、退耕还草及农用地内部结构调整政策的实施实现了经济和环境双赢的预期效果。
Supported by the land use/cover change(LUCC) detailed survey data of all 24 villages and towns of the suburb of Yan'an City during 1984~2002, on the basis of analyzing the feature of quantity and structure change of LUCC in the suburb of Yan'an City during 1984~2002, using the newest achievement about ecological value estimation of domestic and international scholar, and considering the concrete conditions of the suburb of Yan'an City, the authors have estimated the economic worth of ecosystem service function of the suburb of Yan'an City each year during 1984~2002, calculated the relative changes of the economic worth of the ecosystem service function on a basis of 1984, and analyzed the features of the changes during different periods and its reason. Studies have shown: Generally,during 1984~2002,the responds on environment of LUCC in the suburb of Yan'an City were positive. Ecosystem economic worth improved in general. The policy of returning farmland to woodland and grassland, as well as the implementation of inside structural adjustment of policy, realize economic and environmental anticipated result .
出处
《水土保持学报》
CSCD
北大核心
2004年第4期130-133,共4页
Journal of Soil and Water Conservation
基金
国家自然科学基金资助项目(40371003)
教育部重点项目(01158)
关键词
延安市
城郊区
土地利用
动态分析
生态效应
Yan'an city
suburb
LUCC
environment responding
ecological value
