Arid Zone Research ›› 2022, Vol. 39 ›› Issue (2): 594-604.doi: 10.13866/j.azr.2022.02.26

• Ecology and Environment • Previous Articles     Next Articles

Analysis of landscape pattern from 1990 to 2019 based on multi-temporal imagery in arid oasis

SONG Qi1(),SHI Zhou2,FENG Chunhui3,MA Ziqiang4,JI Wenjun5,PENG Jie3,GAO Qi6,JIANG Xuewei1()   

  1. 1. College of Horticulture and Forestry, Tarim University, Alar  843300, Xinjiang, China
    2. College of Environmental and Resource Science, Zhejiang University, Hangzhou  310058, Zhejiang, China
    3. College of Agriculture, Tarim University, Alar 843300, Xinjiang, China
    4. Institute of Remote Sensing and Geographical Information Systems, School of Earth and Space Sciences, Peking University 100871, Beijing, China
    5. College of Land Science and Technology, China Agricultural University 100193, Beijing, China
    6. Changji Geological Environment Monitoring Station, Changji 831100, Xinjiang, China
  • Received:2021-06-17 Revised:2022-01-10 Online:2022-03-15 Published:2022-03-30
  • Contact: Xuewei JIANG E-mail:tarimsongqi@163.com;jxwzky@163.com

Abstract:

In this study, 226 scenes of Landsat image data of Aral Reclamation Area from 1990 to 2019 were used to compare different classification methods, from which that with the highest accuracy was selected. The landscape pattern changes in the Aral Reclamation Area for more than 30 years were analyzed in terms of patch type level, landscape level, abrupt changes, and spatial distribution, respectively. The best results were obtained for the multi-temporal object-oriented classification, with an overall accuracy of 96.57% and a Kappa coefficient of 0.95. At the patch type level, arable land tends to fragment over 30 years, the dominance of unused land decreases, the landscape shape of parkland and woodland tends to become more complex, and the landscape of water bodies and built-up land tends to become more balanced. At the landscape level, landscape shapes become more complex and fragmented, landscape connectivity decreases, and landscape richness and heterogeneity increase. The Aral Reclamation Area underwent a sudden change in landscape pattern in 2005. In terms of spatial distribution, there is a tendency for the central Tarim River region to spread out in all directions.

Key words: Landsat, multi-temporal object-oriented, continuous time series, landscape pattern, mutation point inspection, Aral Reclamation Area