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Quantifying the impacts of land use/land cover change on groundwater depletion in Northwestern China – A case study of the Dunhuang oasis

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  • Zhang, Xifeng
  • Zhang, Lanhui
  • He, Chansheng
  • Li, Jinlin
  • Jiang, Yiwen
  • Ma, Libang

Abstract

In recent decades, the Dunhuang oasis in the arid Northwest China has been undergoing significant changes due to social-economic development and expanded irrigation for agricultural production. Groundwater table was found to have significantly declined during the period of 1987–2007 owing to greater pumping. We analyzed the impacts of land use/land cover (LU/LC) changes on the groundwater fluctuations in the study area. The LU/LC types were derived from the satellite images for the years of 1987, 1990, 1996, 2001 and 2007. The water consumptions associated with the LU/LC types were estimated using the FAO-Penman–Monteith method. Results show that during the period of 1987–2007, the area of agricultural land sharply increased by 98.7km2, and the cash crops were the main contributor. Under the current market system, farmers had much more autonomy and greater incentives to shift the cropping pattern from the traditional food crops to the high value cash crops with greater water consumption. The total water consumption of the cash crops accounted for 14.1% of the total water consumption in 1987, but increased to 71.6% in 2007, becoming the largest water consumer. The agricultural land use was the main cause of the declining groundwater table during the period from 1987 to 2007.

Suggested Citation

  • Zhang, Xifeng & Zhang, Lanhui & He, Chansheng & Li, Jinlin & Jiang, Yiwen & Ma, Libang, 2014. "Quantifying the impacts of land use/land cover change on groundwater depletion in Northwestern China – A case study of the Dunhuang oasis," Agricultural Water Management, Elsevier, vol. 146(C), pages 270-279.
    • Handle: RePEc:eee:agiwat:v:146:y:2014:i:c:p:270-279
    DOI: 10.1016/j.agwat.2014.08.017
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    References listed on IDEAS

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    1. Kashyap, P. S. & Panda, R. K., 2001. "Evaluation of evapotranspiration estimation methods and development of crop-coefficients for potato crop in a sub-humid region," Agricultural Water Management, Elsevier, vol. 50(1), pages 9-25, August.
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    3. Ameur, Fatah & Kuper, Marcel & Lejars, Caroline & Dugué, Patrick, 2017. "Prosper, survive or exit: Contrasted fortunes of farmers in the groundwater economy in the Saiss plain (Morocco)," Agricultural Water Management, Elsevier, vol. 191(C), pages 207-217.
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    5. Honghui Zhu & Meiling Du & Xiaojun Yin, 2023. "Oasification in Arid and Semi-Arid Regions of China: New Changes and Re-Examination," Sustainability, MDPI, vol. 15(4), pages 1-17, February.
    6. Jumeniyaz Seydehmet & Guang-Hui Lv & Abdugheni Abliz, 2019. "Landscape Design as a Tool to Reduce Soil Salinization: The Study Case of Keriya Oasis (NW China)," Sustainability, MDPI, vol. 11(9), pages 1-17, May.
    7. Bruno M. Meneses & Eusébio Reis & Susana Pereira & Maria J. Vale & Rui Reis, 2017. "Understanding Driving Forces and Implications Associated with the Land Use and Land Cover Changes in Portugal," Sustainability, MDPI, vol. 9(3), pages 1-20, February.
    8. Jinmeng Lee & Xiaojun Yin & Honghui Zhu & Xin Zheng, 2023. "Geographical Detector-Based Research of Spatiotemporal Evolution and Driving Factors of Oasification and Desertification in Manas River Basin, China," Land, MDPI, vol. 12(8), pages 1-20, July.
    9. Jaime Martínez-Valderrama & Rolando Gartzia & Jorge Olcina & Emilio Guirado & Javier Ibáñez & Fernando T. Maestre, 2024. "Uberizing Agriculture in Drylands: A Few Enriched, Everyone Endangered," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 38(1), pages 193-214, January.

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