太原景观格局脆弱度时空动态研究  

The vulnerability of landscape pattern and its temporal and spatial dynamics in Taiyuan

作　　者：石玉琼 王宁练[1,2] SHI Yuqiong;Wang Ninglian(College of Urban and Environmental Science,Northwest University,Xi’an,710124,China;Shaanxi Key Laboratory of Earth Surface System and Environmental carrying Capacity,Xi’an,710024,China;College of Forestry Shanxi Agricultural University,Taigu 030801,China)

机构地区：[1]西北大学城市与环境学院,西安710124 [2]西北大学陕西省地表系统与环境承载力重点实验室,西安710124 [3]山西农业大学林学院,太谷030801

出　　处：《测绘科学》2023年第7期105-115,154,共12页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42130516)。

摘　　要：针对景观脆弱度评价中存在的因子重复计算以及对建设用地和林地易损度的认识不同问题,对景观格局脆弱度指数进行了改进,并对建设用地和林地易损度进行了探讨。根据Landsat8数据,研究了2000-2019年太原景观格局脆弱度的时空动态变化。采用改进后的景观脆弱度指数很好地避免了因子重复计算问题,合理地确定了建设用地和林地的易损度。太原景观格局脆弱度时空变化研究表明:①从太原整个景观层次的景观格局脆弱度来看,2000—2010年逐渐减小,2010—2015年又增大,而2015—2019年又略有减小,2000—2019年的变化趋势与林地和中高覆盖度草地面积变化趋势正好相反。②2000年和2005年以中度脆弱区面积最大,2010—2019年均以较低度脆弱区面积最大,2000—2019年,低度脆弱区和较低度脆弱区面积在增大。该文对景观格局脆弱度指数进行的改进,不仅简化了参数,更是避免了重复,使计算更加合理。景观太原景观格局脆弱度具有较强的正相关关系,空间分异总体较小,“高-高”值区分布较集中,出现在人类活动强度较大的东南部平原区域,“低-低”值区分布较分散,主要分布在林草覆盖度较好的区域。In view of the multiple calculation of factors in landscape vulnerability evaluation and the different understanding of the vulnerability of construction land and forest land,this paper improved the vulnerability index of landscape pattern,and discussed the vulnerability of construction land and forest land.On this basis,according to Landsat8data,The temporal and spatial dynamics of landscape pattern vulnerability in Taiyuan from 2000to 2019are studied.Using the improved landscape vulnerability index,the problem of factor double calculation is avoided,and the vulnerability of construction land and forest land is determined reasonably.The spatio-temporal variation of landscape pattern vulnerability in Taiyuan shows that:①From the perspective of landscape pattern vulnerability at the whole landscape level in Taiyuan,it gradually decreased from 2000to 2010,increased from 2010to 2015,and slightly decreased from 2015to 2019.The change trend from 2000to 2019was opposite to the change trend of forest land and medium-high coverage grassland.②The area of moderate vulnerable areas was the largest in 2000and 2005,the area of low vulnerable areas was the largest from 2010to 2019,and the area of low vulnerable areas and low vulnerable areas increased from 2000to 2019.The improvement of the landscape pattern vulnerability index not only simplifies the parameters,but also avoids repetition and makes the calculation more reasonable.The landscape pattern vulnerability of Taiyuan has a strong positive correlation,the spatial difference is generally small,the distribution of“high-high”value area is concentrated,which appears in the southeast plain area with greater human activity intensity,and the distribution of“low-low”value area is scattered,mainly distributed in the area with better forest and grass coverage.

关 键 词：景观格局脆弱度 时空动态 空间自相关 太原 

分 类 号：P237[天文地球—摄影测量与遥感]