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Spatio-Temporal Changes of Oases in the Hexi Corridor over the Past 30 Years

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  • Yaowen Xie

    (School of Earth and Environment Science, Lanzhou University, Lanzhou 730000, China
    The Key Laboratory of Western China’s Environmental Systems, Ministry of Education, Lanzhou 730000, China)

  • Qiang Bie

    (School of Earth and Environment Science, Lanzhou University, Lanzhou 730000, China)

  • Hui Lu

    (School of Earth and Environment Science, Lanzhou University, Lanzhou 730000, China)

  • Lei He

    (School of Earth and Environment Science, Lanzhou University, Lanzhou 730000, China)

Abstract

In recent decades, the oases in the Hexi Corridor have gone through a tremendous transformation, which has caused a series of social and environmental problems. We aim to explore quantitatively the characteristics of the oasis expansion and their dynamic mechanism(s) in the Hexi Corridor, and their implications and impact on current and future policies. The spatial distribution pattern and dynamic changes experienced by the oases are examined using Landsat imagery. Their spatio-temporal changes are analyzed using the grid-transformed model and the dynamic-degree model. The model drivers are analyzed based on data from statistics yearbooks and field surveys. The total area of oases in the Hexi Corridor has expanded tremendously during the last 30 years from 10,709 km 2 to 14,950 km 2 , almost 40% of the original value. Oasis evolution patterns of ‘unchanged’, ‘expanding’, ‘shrinking’, and ‘oscillating’ are observed at different periods in the three basins. In terms of area, almost half of the oases experienced some change, where most of the changes took place in the ecotone between oases and deserts, and the interior of oases due to the reclamation of abandoned land. Oasis expansion is mainly determined by the human instincts for survival and well-being, which are generally governed by population growth, agricultural policies and economic development. These changes reflect the need to find a balance in the relationship between ecological protection and increasing the well-being of local residents, because unreasonable or excessive development and utilization will cause damage to the local ecological environment.

Suggested Citation

  • Yaowen Xie & Qiang Bie & Hui Lu & Lei He, 2018. "Spatio-Temporal Changes of Oases in the Hexi Corridor over the Past 30 Years," Sustainability, MDPI, vol. 10(12), pages 1-18, November.
  • Handle: RePEc:gam:jsusta:v:10:y:2018:i:12:p:4489-:d:186317
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    References listed on IDEAS

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    2. Shan Huang & Qi Feng & Zhixiang Lu & Xiaohu Wen & Ravinesh C. Deo, 2017. "Trend Analysis of Water Poverty Index for Assessment of Water Stress and Water Management Polices: A Case Study in the Hexi Corridor, China," Sustainability, MDPI, vol. 9(5), pages 1-17, May.
    3. Xiuxia Zhang & Yaowen Xie, 2017. "Detecting Historical Vegetation Changes in the Dunhuang Oasis Protected Area Using Landsat Images," Sustainability, MDPI, vol. 9(10), pages 1-13, September.
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    Cited by:

    1. Xinyang Yu & Younggu Her & Xicun Zhu & Changhe Lu & Xuefei Li, 2021. "Multi-Temporal Arable Land Monitoring in Arid Region of Northwest China Using a New Extraction Index," Sustainability, MDPI, vol. 13(9), pages 1-15, May.
    2. Hadjira Berbache & Mohamed Khaoui & Makhloufi Hadjab, 2022. "The oasis system in southern Algeria: a natural heritage threatened with disappearance, case of the oasis of Biskra," Technium Social Sciences Journal, Technium Science, vol. 34(1), pages 588-603, August.
    3. Yu Fang & Xulian Wang & Yufei Cheng & Zhongjing Wang, 2022. "Oasis Change Characteristics and Influencing Factors in the Shiyang River Basin, China," Sustainability, MDPI, vol. 14(21), pages 1-16, November.
    4. Jinglin Zhang & Wei Zhang & Dongsheng Li & Xueliang Chen & Wei Zhang, 2022. "Regime Shifts in the Hexi Oases over the Past Three Decades: The Case of the Linze Oasis in the Middle Reaches of the Heihe River," Sustainability, MDPI, vol. 14(23), pages 1-13, December.

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