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Sciences in Cold and Arid Regions ›› 2016, Vol. 8 ›› Issue (6): 516-523.doi: 10.3724/SP.J.1226.2016.00516

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Relationship between sand-dust weather and water dynamics of desert areas in the middle reaches of Heihe River

Yun Niu1,2,3, XianDe Liu2,3, Xin Li1, YanQiang Wei1, Hu Zhang2,3, XiaoYan Li2,3   

  1. 1. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;
    2. Academy of Ecology Science of Zhangye, Gansu; Science and Technology Innovation Service Platform of Ecology in Qilian Mountains, Gansu Province, Zhangye, Gansu 734000, China;
    3. Academy of Water Resource Conservation Forests of Qilian Mountains in Gansu Province, Test Station of Desertification Control in Hongshawo, Zhangye, Gansu 734000, China
  • Received:2016-05-17 Revised:2016-07-26 Published:2018-11-23
  • Contact: Ph.D., XianDe Liu, Professor of Academy of Water Resource Conservation Forests of Qilian Mountains in Gansu Province, No. 3, East Road, Zhangye, Gansu 734000, China. E-mail: xiandeliu666@163.com E-mail:xiandeliu666@163.com
  • Supported by:
    This work was supported by the Science and Technology Innovation Service Platform of Qilian mountains in Gansu Province (No. 144JTCG254), the Innovation Groups of Basic Research of Gansu Province (No. 145RJIG337), and the National Natural Science Foundation of China (No. 41461004).

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Abstract: Sand-dust weather has become an international social-environmental issue of common concern, and constitutes a serious threat to human lives and economic development. In order to explore the responses of natural desert sand and dust to the dynamics of water in desertification, we extracted long-term monitoring data related to precipitation, soil water, groundwater, and sand-dust weather. These data originated from the test stations for desertification control in desert areas of the middle reaches of the Heihe River. We used an algorithm of characteristic parameters, correlations, and multiple regression analysis to establish a regression model for the duration of sand-dust weather. The response characteristics of the natural desert sand and dust and changes of the water inter-annual and annual variance were also examined. Our results showed: (1) From 2006 to 2014 the frequency, duration, and volatility trends of sand-dust weather obviously increased, but the change amplitudes of precipitation, soil water, and groundwater level grew smaller. (2) In the vegetative growth seasons from March to November, the annual variance rates of the soil moisture content in each of four studied layers of soil samples were similar, and the changes in the frequency and duration of sand-dust weather were similar. (3) Our new regression equation for the duration of sand-dust weather passed the R test, F test, and t test. By this regression model we could predict the duration of sand-dust weather with an accuracy of 42.9%. This study can thus provide technological support and reference data for water resource management and research regarding sand-dust weather mechanisms.

Key words: sand-dust weather, water dynamics, regression model, middle reaches of the Heihe River

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