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https://doi.org/10.5194/esd-2017-75
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
21 Aug 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Dynamics (ESD).
Water requirements of the oasis in the middle Heihe River Basin, China: Trends and causes
Xingran Liu1,2 and Yanjun Shen1 1Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 286 Huaizhong Road, Shijiazhuang 050021, China
2University of Chinese Academy of Sciences, Beijing 100049, China
Abstract. The middle Heihe River Basin is the main grain base of the northwestern China, where consumed the most water in the whole Heihe River basin. Increasing share of water resources in the middle Heihe River Basin has caused various issues in hydrology, ecology and environment in the Heihe River Basin, especially the downstream. To make clear how and why the water requirement has changed is significant for the water management in the study region. During the past ~30 years, the water requirement amount of the oasis increased from 10.7 × 108 m3 in 1986 to 18.8 × 108 m3 in 2013. And 76 %–82 % of the oasis water requirement amount was consumed by the cultivated land. Maize, spring wheat, and vegetable are the main crops in the middle Heihe River Basin. The mean annual water requirements of the maize, spring wheat, and vegetable were 562.4 mm, 408.7 mm, and 719.0 mm, respectively. By the contribution analysis, the extended planting area was the primary reason why the water requirement has increased in the past ~30 years, the contribution of which to the long-term trend in annual water requirement was 58.3 % and 60.6 % for the oasis and cultivated land, respectively. The changes in land structure were the secondary reason, which explained 25.3 % and 23.4 % of the water requirement variation in the oasis and cultivated land, respectively. The contribution of the climate change was relatively less, which contributed only 7.0 % and 6.8 % to the water requirement variation in the oasis and cultivated land, respectively.

Citation: Liu, X. and Shen, Y.: Water requirements of the oasis in the middle Heihe River Basin, China: Trends and causes, Earth Syst. Dynam. Discuss., https://doi.org/10.5194/esd-2017-75, in review, 2017.
Xingran Liu and Yanjun Shen
Xingran Liu and Yanjun Shen
Xingran Liu and Yanjun Shen

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Short summary
The water requirement amount of the oasis increased from 10.7 × 108 m3 in 1986 to 18.8 × 108 m3 in 2013. And 76 %–82 % of the oasis water requirement amount was consumed by the cultivated land. The extended planting area was the primary reason why the water requirement has increased in the past ~30 years, which contributed 58.3 % to the increase for the oasis. The changes in land structure were the secondary reason, which explained 25.3 % of the water requirement variation in the oasis.
The water requirement amount of the oasis increased from 10.7 × 108 m3 in 1986 to 18.8 × 108 m3...
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