长江流域资源与环境 >> 2011, Vol. 20 >> Issue (4): 422-.

• 自然资源 • 上一篇    下一篇

川东平行岭谷区土地利用变化时空分异特征

李阳兵,谢静,邵景安,张双   

  1. (1.重庆师范大学地理科学学院|重庆 400047;2.重庆师范大学图书馆,重庆 400047)
  • 出版日期:2011-04-20

CHARACTERISTICS OF SPATIOTEMPORAL PATTERN EVOLUTION OF LAND USE IN PARALLELED RIDGEVALLEY OF EAST SICHUAN

LI Yangbing1, XIE Jing2, SHAO Jingan1, ZHANG Shuang1   

  1. (1.College of Geography Science,Chongqing Normal University,Chongqing 400047,China;2.Library of Chongqing Normal University,Chongqing 400047,China
  • Online:2011-04-20

摘要:

川东平行岭谷地区生态地位十分重要,研究其土地利用变化及其影响因素具有重要的意义。利用1986、2000和2007年的Landsat TM影像,辅以10 m分辨率的SPOT影像和野外调查,结合土地利用程度、土地利用效应指数探讨了平行岭谷地区土地利用/土地覆被的空间格局和变化轨迹及其相应的生态效应。结果表明,研究区土地利用格局受地形空间分异明显控制;1986~2007年,土地利用变化总体特征是建设用地、水体增加,耕地减少,耕地耕地建设用地变化迹线占1986~2007年建设用地变化量的6647%,建设用地的增加主要以2000年后的耕地转入为主;邻近主城所在地的岭谷条带土地利用程度指数增加快于相隔较远的其它各区;总的说来,土地利用效应的增加和强化大于恢复和减少。研究区土地利用变化的因素可归纳为主城区的通道效应、岭谷区交通线的节点效应和河流廊道引起的土地利用变化。进一步的研究应揭示平行岭谷地区通道驱动效应和低山阻隔效应综合作用下土地利用演变过程和景观生态多样性的维持机制,模拟通道驱动效应与生态安全双重约束下的土地利用优化格局

Abstract:

It is important to study the land use change and influencing factors of the paralleled ridgevalley region of East Sichuan because of its great ecological status.Using Landsat TM images of 1986,2000 and 2007,supplemented by SPOT images of 10 m resolution and field surveys,the spatial pattern,the changing track and the corresponding ecological effect of land use/cover of this region were discussed by use of synthetic index of land use extent and land use impact index in this paper.In the study area,it is obvious that land use pattern is under control of the terrain spatial differentials.From 1986 to 2007,land use change in general was characterized by the increase of construction land and water body and the reduction of arable land.The change of arable landconstruction land accounted for 6647% of the total change of 1986~2007.The increase of construction land was mainly due to the fact that some arable land turned to construction land after 2000.Land use degree index of the banded ridgevalley region near the main city increased faster than that of the other farther areas.The factors of land use change of the study area were ascribed to traffic road network effect in main urban area of Chongqing,the node effect of traffic line in the ridgevalley region as well as land use change caused by river corridor.On the whole,the increase and enhancement of the land use effect were larger than the recovery and the reduction of it.The further studies are required to reveal the evolution process of land use and the mechanisms for the maintenance of landscape ecological diversity under the comprehensive effect of the traffic road network driving effect of the paralleled ridgevalley region and the low mountain obstructing effect,and to simulate the optimized land use pattern under the traffic road network driving effect and in the condition of ecological safety

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