摘要
依据TM影像解译的土地利用类型转换数据和社会经济数据,以地处中国北方农牧交错区的陕西省榆林市为例,分析了1990～2000年土地利用类型转换的主要驱动因子。自然因子为海拔与坡度,人类驱动因子为治沙种草与造林、农业结构调整、土地退化、开垦耕地、建设用地和退耕还林(草);同时运用定性与定量相结合的方法,揭示了土地利用类型转换随海拔和坡度的规律性变化,以及生态建设驱动因子在榆林市土地利用类型转换中起着决定性作用。
Based on the TM data and the socio-economic data in 1990～2000, as a case of the Yulin Municipality, Shaanxi Province in the interlocked agro-pasturing area of north china, the main driving factors of land-use conversation are analyzed. Physical driving factors include altitude and gradient, and human driving factors include afforestation and growing grass for desertification control and prevention, agricultural structure adjustment, land degradation, land reclamation, building occupation, de-farming and reforestation. By qualitative and quantificational integrated means, the laws of land-use conversion along with the change of altitude and gradient are found out. And it also shows that policy factors about ecological environment construction play crucial role during land-use conversion of Yulin Municipality.
出处
《水土保持学报》
CSCD
北大核心
2004年第4期113-116,共4页
Journal of Soil and Water Conservation
基金
国家自然科学基金资助项目(40271007)
中国科学院知识创新工程项目(CXIOG-E01-05-03
CXIOG-B02-05)
