A study of the landscape fragmentations of land cover structure based on Landsat8 remote sensing image: A case study of Mata watershed in Yan’an, Shaanxi Province
LI Guoqing1,2(), HUANG Jinghua1,2, LIU Guan3, LI Jie3, ZHAI Bochao3, DU Sheng1,2
1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100,China 2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100, China 3. College of Forestry, Northwest A&F University, Yangling 712100, China
The process of landscape fragmentation is accompanied by the decline of landscape function. Therefore, the study of landscape fragmentation is of great significance for timely monitoring of ecological security and adjustment of land cover structure. This research was designed to map the current status of land cover structure of Mata watershed using supervised classification algorithms in south of Yan’an City based on Landsat 8 satellite data and to describe its landscape fragmentation using six fragmentation indices at three organization levels: patch, class, and landscape. The results are as follows: ① The status of land cover in this area can be characterized accurately based on Landsat8 satellite image and the accuracy of supervised classification is 74% together with the kappa value of 0.68; ② Mata watershed can be classified into 6 land cover classes, i.e., forest land, shrub land, grass land, orchards land, farm land, and others land (road and village). The orchard land occupies the largest area in all land cover types; ③ The extent of landscape fragmentation for shrub, grass and farm lands is relatively more serious than that of forest, orchard and others lands, indicating that landscape functions of shrub, grass and farm lands have been weakened in capability of ecological protection and agricultural production; ④ Transforming small patches of shrub, grass and farm lands into adjacent land type with large patches should improve the integration level of landscape in the Mata watershed, which is conducive to the improvement of landscape function in Mata watershed.
李国庆, 黄菁华, 刘冠, 李洁, 翟博超, 杜盛. 基于Landsat8卫星影像土地利用景观破碎化研究——以陕西省延安麻塔流域为例[J]. 国土资源遥感, 2020, 32(3): 121-128.
LI Guoqing, HUANG Jinghua, LIU Guan, LI Jie, ZHAI Bochao, DU Sheng. A study of the landscape fragmentations of land cover structure based on Landsat8 remote sensing image: A case study of Mata watershed in Yan’an, Shaanxi Province. Remote Sensing for Land & Resources, 2020, 32(3): 121-128.
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2020, Vol. 32 
), 黄菁华1,2, 刘冠3, 李洁3, 翟博超3, 杜盛1,2
