岩溶槽谷区坡耕地利用的时空演变特征及驱动机制  

Spatial-temporal Evolution Characteristics and Driving Mechanism of Slope Cultivated Land Use in Karst Trough Valley Area

作　　者：王权 李阳兵[1] 胡先培 李珊珊[1] 陈会 WANG Quan;LI Yang bing;HU Xian pei;LI Shan shan;CHEN Hui(School of Geographic and Environ mental Sciences,Guizhou Normal University,Guiyang 550025,China)

机构地区：[1]贵州师范大学地理与环境科学学院

出　　处：《生态与农村环境学报》2020年第1期53-61,共9页Journal of Ecology and Rural Environment

基　　金：国家重点研发计划(2016YFC0502300);国家自然科学基金(41661020)

摘　　要：探讨当前多重要素驱动影响下岩溶槽谷区坡耕地利用的时空演变规律,对地区粮食安全和土地管理具有重要意义。以高精度影像和地理高程模型为数据源并结合野外实地调查,通过坡耕地利用动态指标和缓冲区方法探讨槽谷区坡耕地时空演变特征。结果表明:(1)2005—2017年,西、中和东部槽谷的坡耕地利用都发生了动态变化,且缓坡耕地和斜坡耕地变化最显著。(2)随距居民点和道路距离增加,坡耕地面积总体减少,但变化趋势不同。(3)西、东部槽谷坡耕地转移的空间格局主要集中于槽坝平坦部位,中部槽谷主要集中于山坡两侧。(4)槽谷区坡耕地演变的时空分异格局受多种因素共同影响,自身地形地貌对坡耕地的形成具有决定作用,地区经济产值提高对坡耕地利用具有改造作用,农业结构调整对坡耕地利用功能具有多样性促进作用,分析多重因素对槽谷区坡耕地利用演变趋势的驱动机制可为地区因地施策提供科学参考。It is of great significance to explore the spatial temporal evolution laws of slope cultivated land utilization driven by various factors in karst trough valley area,which can help the regional food security and land management.Based on the high resolution image and DEM as the data sources combined with field survey to verify the image,the slope cultivated land was calculated by using dynamic index and buffer analysis to study the general laws and differences of spatial temporal evolution of slope cultivated land.The results are as follows:(1)During the period from 2005 to 2017,the slope cultivat ed land in the western,middle and eastern trough valley all changed dynamically and the most significant change were the gentle slope cultivated land and oblique slope cultivated land.(2)As the increase of distance between residential and road areas,the change of areas of slope cultivated land showed different decreasing trends.(3)In the western and eastern trough valley,the slope cultivated land transfer mainly focused on the trough basine,while in the middle trough valley mainly focused on the hillsides.(4)The spatial temporal differentiation pattern of slope cultivated land evolution were af fected by various factors,among them,the topography and landform of karst trough valley had a decisive role in the forma tion of slope cultivated land,the improvement of regional economic output had a transform effect on the slope cultivated land use and agricultural structure adjustment had diversity effect on slope cultivated land use function.Therefore to evalu ate,the multi factors and the evolution trend of slope cultivated land use in trough valley areas can provide scientific refer ence for regional local policy.

关 键 词：坡耕地利用 动态变化 转移矩阵 时空变化特征 岩溶槽谷 贵州省 

分 类 号：X22[环境科学与工程—环境科学] F301.2[经济管理—产业经济]