摘要
在当前多因素驱动下探讨岩溶槽谷区地形起伏对景观格局的影响,对区域景观规划和生态修复具有重要意义.本文以2017年Google Earth 0.53 m高清影像和DEM(Digital Elevation Model)为数据源,结合实地调查验证,通过移动窗口法和均值变点法提取地形起伏度和典型代表性样带设计,从景观水平尺度探究地形起伏对景观格局的影响,并运用Logistic回归模型分析景观格局和影响因子之间的定量关系,揭示其现实与理论意义.结果表明:受槽谷地形起伏特征影响,景观类型随地形起伏度的增加呈现不同的变化模式;西部槽谷景观类型呈三种变化模式,中部槽谷呈现先增加后增减少的变化模式,东部槽谷呈两种变化模式;低地形起伏区域景观结构较复杂,高地形起伏度区域景观呈现单一性;景观格局由低地形起伏向高起伏演变呈现出梯度差异性,景观格局由人为景观逐渐向自然景观过渡;岩溶槽谷区景观格局在地形起伏度的分布受多重因素影响,其中自然条件是景观格局决定因素,社会经济是推动因素,政策是再分配因素.
It is of great significance to explore the influence of topographic relief of karst trough valley on landscape pattern under the backgrounds driven by various factors,which can help the regional landscape planning and ecological restoration.This study,based on the Google Earth image of 2017 with 0.53 m resolution and DEM(Digital Elevation Model)as the data source combined with field survey to verify the images,used the move window method and the mean variable point method to extract the topographic relief and the typical representative sample tape design to study the impact of topographic relief on the landscape pattern in landscape level scales.The quantitative relationship between landscape pattern and influence factors was analyzed by logistic regression model,and its reality and theoretical significance were revealed,too.Influenced by the topographical features of trough valley,the landscape type showed different change modes as the terrain relief increases,i.e.,the landscape type of the western trough valley showed three change modes,a first increased and then decreased mode in the middle trough valley,two change modes in the eastern trough valley.The landscape structure of the low terrain relief area was complex,while the landscape of the high terrain relief area was unitary.The landscape pattern showed a gradient difference from low terrain relief to high relief,which was gradual transition from the artificial landscape to the natural landscape.The distribution of the landscape pattern in different topographic relief in karst trough valley area was affected by various factors,of which the natural conditions were the determinants of landscape pattern,the social economy conditions were the driving factor,and the policy was the redistribution factor.
作者
王权
李阳兵
WANG Quan;LI Yangbing(School of Geographic and E nwironmental Sciences,Guizhou Normal University,Guiyang 550025,China)
出处
《山地学报》
CSCD
北大核心
2019年第5期702-716,共15页
Mountain Research
基金
贵州师范大学研究生创新基金项目(YC[2018]025)
国家重点研发计划项目(2016YFC0502300)
国家自然科学基金项目(41661020)。
关键词
岩溶槽谷
地形起伏
均值变点法
样带
景观格局
GIS
karst trough valley
topographic relief
mean point method
sample tape
landscape pattern
GIS
