JOURNAL OF NATURAL RESOURCES ›› 2019, Vol. 34 ›› Issue (11): 2427-2439.doi: 10.31497/zrzyxb.20191114

• Resource Utilization and Management • Previous Articles     Next Articles

Effects of different level roads on land use and landscape pattern of Manas River Basin

YU Tao1,2, BAO An-ming1, LIU Tie1, GUO Hao1,2, ZHENG Guo-xiong1,2, CHEN Tao1,2   

  1. 1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-04-05 Revised:2019-08-08 Online:2019-11-28 Published:2019-11-28

Abstract: In order to reveal the processes and mechanisms of roads on land use and landscape pattern changes in arid and semi-arid regions, this paper selects the Manas River Basin as the study area, and selects different level roads in this basin in 1976 as the research object. Based on land use classification data covering 1976 and 2015, the method of buffer analysis, combined with land use dynamics, land use comprehensive indexes and landscape indexes, was used to examine the changes of land use and landscape pattern on the road buffer and buffer gradient of all levels in the past 40 years. The results show that the roads of the Manas River Basin have a significant impact on the land use change in recent 40 years and there is a gradient effect: the farther away from the road, the smaller the disturbance of the roads of all levels; the degree of impact of various grades of roads on the overall land use change show that: highway and national roads > provincial roads and special roads > county roads and township roads. In addition, highways and national roads, provincial roads and special roads, county roads and township roads have the greatest impact on the change of forest land, water area and construction land in the buffer zone. The landscape pattern analysis shows that the landscape fragmentation and heterogeneity have increased in different buffer zones of all levels in the past 40 years, but the landscape spread has decreased; the most intense range of the highways and national roads, provincial roads and special roads, county roads and township roads is 3600 meters, 600 meters and 300 meters, respectively, and the farther away from the road, the more the landscape shape is interfered by the road, and the shape of the landscape is more and more regular. This study could provide a reference for the planning of road networks in arid and semi-arid areas and the reasonable development and allocation of land resources.

Key words: land use, roads, landscape pattern change, buffer analysis, Manas River Basin