Journal of Geo-information Science ›› 2022, Vol. 24 ›› Issue (9): 1755-1770.doi: 10.12082/dqxxkx.2022.220157

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Spatial-temporal Evolution Characteristics and Mechanism of “Three-Function Space” in the Three-Rivers Headwaters' Region from 1992 to 2020

ZHANG Ke1(), WEI Wei1,2,*(), ZHOU Jie1, YIN Li1, XIA Junnan1   

  1. 1. School of Urban Design, Wuhan University, Wuhan 430072, China
    2. China Institute of Development Strategy and Planning, Wuhan University, Wuhan 430072, China
  • Received:2022-04-06 Revised:2022-05-20 Online:2022-09-25 Published:2022-11-25
  • Contact: WEI Wei;
  • Supported by:
    Major Issues of the National Development and Reform Commission Entrusted the Project(201708)


The Three-River Headwaters region is an important national ecological security barrier and ecological civilization demonstration area. It is of great significance to quantify the evolution characteristics and driving mechanism of spatial patterns of the ecological space, agricultural space, and urban space in this area. Firstly, the change characteristics of every single land use type from 1992 to 2020 were analyzed. Secondly, combining with land classification and quantitative evaluation, the agriculture and animal husbandry space was identified, and the " three-function space " was further defined and its evolution characteristics were analyzed. Finally, the geodetector was used to analyze the driving mechanism behind the changes. The results show that: (1) The urban space growth rate in the Three-River Headwaters region was 774.56%. The decrease of ecological space and agricultural space was very small, but the dynamic transformation was obvious. The turning point of ecological space and agricultural space changes is 2005 and 2015, with a u-shaped trend and an inverted U-shaped trend, respectively; (2) There are four types of cross-transformation in the study area. The area of ecological space converted to agricultural space is 1154.1km², and most of the transformation occurred in the dominant climate change zone, with a large amount but a slow rate. The area of agricultural space to ecological space is 1140.8km², which is mainly distributed in areas with climate and human activities, and the transformation speed is obviously faster. The total amount of agricultural space and ecological space converted into urban space is 41.0 km² and 12.3 km², respectively, mostly distributed in central cities and towns. The transformation rate shows a trend of "slow growth, faster growth, and slower growth" in three stages; (3) The basic geographical condition is the primary driving force of the evolution of " three-function space ", which restricts the location and direction of the cross transformation. Social and economic factors are the key driving forces of evolution and have a significant impact on the scale and speed of cross transformation. After 2005, ecological protection policies began to play an important role, especially in the process of "ecology-agriculture" cross transformation. This study provides a new idea for the downscaling of the main function of animal husbandry areas and the control of territorial space usage, which can be applied to the decision-making of ecological environment protection and the formulation of territorial space planning at all levels in the Three-River Headwaters region.

Key words: Three-River Headwaters region, spatial pattern, evolution characteristics, driving mechanism, land use, agriculture and animal husbandry space, three-function space, geodetector