Arid Zone Research ›› 2022, Vol. 39 ›› Issue (3): 968-977.doi: 10.13866/j.azr.2022.03.30

Previous Articles     Next Articles

Land-use change and ecological environment effects on Fenhe River Basin

SU Yingqing1(),ZHANG Enyue2,LIU Yuan3,LIU Geng1(),LIN Fei1   

  1. 1. Research Center for Scientific Development of Fenhe River Valley, Taiyuan Normal University, Jinzhong 030619, Shanxi, China
    2. College of Geography Science, Taiyuan Normal University, Jinzhong 030619, Shanxi, China
    3. College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030800, Shanxi, China
  • Received:2021-08-03 Revised:2021-10-28 Online:2022-05-15 Published:2022-05-30
  • Contact: Geng LIU E-mail:18234090836@163.com;liugeng9696@126.com

Abstract:

Research on land-use changes and ecological environment effects is important to understand regional ecological environment changes and promote the coordinated development of regional economy and environment. In this paper, the Fenhe River Basin was selected as the study area. Based on the land use and normalized vegetation index data in five periods (2000, 2005, 2010, 2015, and 2018), land-use changes and ecological effects in the study area in 2000, 2005, 2010, 2015, and 2018 were comprehensively analyzed using land-use dynamic attitude, geological information map, ecological value index, and fractional vegetation cover. Results showed that (1) from 2000 to 2018, the construction land and forest land in the basin showed an increasing trend; the growth areas were 1350.90 km2 and 85.50 km2, accounting for 92.83% and 0.96%, respectively. The cultivated land and grassland showed a slight downward trend, and the reduction areas were 729 km2 and 674.10 km2, respectively. The reduction rates were -5.02% and -7.63%, respectively. Waters and unused land maintained a multi-year average of 297 km2 and 7.92 km2, respectively. The spatial pattern showed that the construction land and cultivated land were concentrated in the core area of the basin, and grassland and forest land were concentrated in the edge area. (2) Comprehensive land-use dynamic degree, land transfer map, and land-use fluctuation trend of each time series were similar, and the evident indigenous change area was primarily located in the basin and its transition zone in the mountainous area. The comprehensive land-use dynamic degree for many years was 4.34%. The single land-use dynamic degree and land-use fluctuation were the highest in construction land and forest land, respectively. (3) Based on the influence of different dominant land-use types, the temporal evolution of the ecological value index showed a wavy “decline-growth-decline” curve; fractional vegetation cover showed “growth-decline-growth” evolution characteristics, and spatial pattern overlapped with spatial patches in land-use change regions. Given the terrain structure, land-use standards, and socio-economic and environmental protection policies, land-use changes in the future basin may increase, and stress on the ecological environment will increase.

Key words: land use/cover change, ecological environment effects, spatio-temporal pattern, Fenhe River Basin, Shanxi