土地转移流视角下土地利用变化过程追踪方法探讨——以宁夏中部干旱带盐池县为例

发布时间：2018-06-05 12:48

  本文选题：土地利用变化 + 土地转移流　； 参考：《西北师范大学学报(自然科学版)》2017年04期

【摘要】：基于土地转移流视角,提出土地转移率和土地转移链概念,采用Landsat MSS/TM/ETM遥感影像数据源,对宁夏中部干旱带盐池县的土地变化过程进行追踪分析.结果表明,1978—2015年盐池县土地利用变化总体表现为耕地和草地比例增大,未利用地减少.区县尺度上,土地转移率先增后减.类型上,耕地转移率为降—升—降态势,草地转移率持续降低,未利用地转移率呈升—降—平稳态势.1978—1987年,以未利用地—耕地流、草地—耕地流为主;1987—1996年,土地利用转移流呈现多元化特征;1996年后加强了生态退耕和对未利用地的改造利用.1978—2015年,土地转移链围绕着耕地的流失与保护进行,单向链主要是63型(未利用地—草地型);往复链以Ⅱa型为主,为363型(草地—未利用地—草地型)、313型(草地—耕地—草地型)和131型(耕地—草地—耕地型);复杂链主要是163型(耕地—未利用地—草地型).
[Abstract]:Based on the view of land transfer flow, the concepts of land transfer rate and land transfer chain are put forward, and Landsat MSS / TM / ETM remote sensing image data source is used to track and analyze the land change process in Yanchi County in the arid zone of Ningxia. The results showed that the change of land use in Yanchi County from 1978 to 2015 showed that the proportion of cultivated land and grassland increased and the unused land decreased. District and county scale, land transfer first increase and then decrease. On the type, the rate of cultivated land transfer is decreasing, the rate of grassland transfer continues to decrease, and the rate of unused land transfer is ascending-descending-steady. 1978-1987, with unused land-cultivated land flow and grassland-cultivated land flow mainly from 1987 to 1996. The flow of land use transfer has diversified characteristics; after 1996, the ecological conversion of farmland and the transformation and utilization of unused land were strengthened, and the land transfer chain revolved around the loss and protection of cultivated land. The unidirectional chain is mainly type 63 (unused land and grassland type), and the reciprocating chain is mainly type 鈪，

本文编号：1982043