川西盆周山地土地利用/覆被变化特征、机制与对策研究——以雅安市天全县为例  

CHARACTERISTICS AND MECHANISM OF LUCC AND COUNTERMEASURES IN THE MOUNTAIN REGIONS AROUND THE WESTERN SICHUAN BASIN——A CASE STUDY OF TIANQUAN COUNTY IN YA’AN

作　　者：李宏[1] 邓良基[1] 张世熔[1] 吴金涛[1] 

机构地区：[1]四川农业大学资源环境学院四川省土地信息重点实验室,四川雅安625014

出　　处：《土壤》2005年第2期169-175,共7页Soils

基　　金：国家"863"计划项目(990140046);四川省教育厅重点基金项目(SC9801402)资助。

摘　　要：采用GIS和数理统计方法,以及土地利用变化指数模型和景观生态学中的空间格局指数对天全县1992～2002年10年间土地利用/覆被变化特征进行研究.结果表明:林地在各种土地利用类型中占的比例最大,且呈逐年递增趋势,2002年达79.14%,但年变化率则很小,只有0.29%;耕地占的比例很小,仅有5.50%,而且10年间面积减少了4813.3 hm2,但年变化率比林地大得多,高达2.68%.受人类活动的影响,10年间多样性指数和均匀度指数呈上升趋势,而优势度指数不断下降.由此得出产生土地利用/覆被变化的机制,除了受地形条件和自然灾害等自然因素的影响外,更为主要的是受人口增长、城市化进程以及政府政策等社会经济因素的驱动.从而有针对性地提出生态发展模式的建议,以期为土地资源的可持续利用提供借鉴.With the aid of GIS and the mathematic statistics method, the land use variation indexing model and the spatial pattern indexes of the landscape ecology were used to study characters of LUCC in Tianquan County from 1992 to 2002. The results showed that the proportion of forest land was the biggest and increasing every year but with a very limited rate of change, being only 0.29 %. It had reached 79.14 % by 2002. The proportion of cultivated land was merely 5.50 % and decreased by 813.3 hm2 in the decade. But its annual variation rate was much higher than that of forest land, reaching up to 2.68 %. Under the impact of human activities, the diversity index and evenness index showed a rising trend, but the dominance index decreased within the decade between 1992 and 2002. Through analysis, it could be inferred that the driving forces of LUCC include natural factors, like landform, nature disaster etc, and social economic factors, such as population growth, urbanization, government behavior and so on. On such a basis, pertinent suggestions for ecological development were put forward.

关 键 词：土地利用/覆被变化 生态发展模式 川西盆周山地 天全县 

分 类 号：F129.9[经济管理—世界经济] F323.211