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１９９３～１９９４年在腾格里沙漠西南缘邓马营湖北部一固定沙丘上设置观测点，采用中子仪、负压计逐日定时分层测定沙丘０～１７５ｃｍ深度含水量和水分势能．对实测资料加以分析表明：（１）沙丘水分深度分布剖面可划分为４层；表面干沙层、水分强烈变化层、低含水量缓变层、高含水量变化层；（２）依据水分势能变化特征，势能剖面可分为变化活跃区、频变区、突变区和缓变区．同时，结合沙丘水分时间变化特征，得出结论：水分势能与水分动态存在较好的对应性．从而表明由势能观点研究沙丘水分动态的可行性和正确性，为沙丘水分运移机理及运移方程的研究提供了一定的科学依据．
From 1993 to 1994, observation points were set on a fixed sand dune in the north of Dengma Camp in the southwestern Tengger Desert. The water content and water potential at 0-175 cm depth were determined by neutron analyzer and negative pressure meter. Analysis of the measured data shows that: (1) The depth distribution of sand dune can be divided into four layers; surface dry sand layer, strong moisture change layer, low water content change layer and high water content change layer; (2) Variations and potential energy profiles can be divided into active regions, frequency-changing regions, mutation regions and slowly changing regions. At the same time, combined with the characteristics of sand dune moisture change, it is concluded that there is a good correspondence between water potential and water potential. It is shown that the research on the water dynamic of dune from the viewpoint of potential energy is feasible and correct, which provides a scientific basis for the research on the mechanism of water transport and the migration equation of sand dune.