PROGRESS IN GEOGRAPHY ›› 2012, Vol. 31 ›› Issue (12): 1732-1738.doi: 10.11820/dlkxjz.2012.12.020

• Original Articles • Previous Articles     Next Articles

Models for Analysis of the Spatial-Temporal Changes of a Single-Type Landscape: A Case Study of Oasis-Making Process in Jiuquan Basin

MA Zongyi1,2, XIE Yaowen1, YU Lin1,2, ZHAO Hong1, GAO Qiao2, QIAN Fu2   

  1. 1. Ministry of Education Key Laboratory ofWestern China’s Environmental Systems, Lanzhou University, Lanzhou 730000, China;
    2. 94891 Troops of PLA, Suzhou 215157, China
  • Received:2012-06-01 Revised:2012-08-01 Online:2012-12-25 Published:2012-12-25

Abstract: Inspired by the dynamic model for single land use, this paper proposes a grid-transformation model for single-type landscape change rate, which reflects well the changes of a single-type landscape in the time period of interest. The paper also puts forth the models for cumulative change rate and spatial and temporal variation index to describe the details of spatial-temporal changes of a single-type landscape in long time series. The models are tested by studying the oasis-making process of Jiuquan Basin in western China from 1963 to 2009. The results indicate: (1) the grid transformation model reflects well the local subtle changes of the single-type landscape for the beginning part and the ending part of the time period of the study, including speed and spatial distribution of the landscape change; (2) the cumulative change rate comprehensively integrates the influence of the data from each time period of the process, and well describes the amplitude and spatial distribution of the single-type landscape change in long time series; (3) the spatial-temporal variation index reflects the different form of the single-type landscape change, and can further describes characteristics and trends of the process of the change; (4) use of all three models provides the whole picture of the characteristics and the process of the single-type landscape change.

Key words: grid transformation, Jiuquan Basin, spatio-temporal change, the single landscape, time series