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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (2): 568-573    DOI: 10.7522/j.issn.1000-694X.2013.00078
    
Probabilistic Modelling of Soil Moisture Dynamics in a Revegetated Desert Area
HUANG Lei1,2, ZHANG Zhi-shan1,2, CHEN Yong-le1,2
1.Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2.Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
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Abstract  

Soil moisture was the key link between land hydrological and ecological processes, which had play an important role in the terrestrial water cycling. With frequent and extreme weather events in recent years, the stochastic simulation of soil moisture has gradually become the research focus in ecohydrology. Based on the continuous monitoring soil moisture data from 2008 to 2011, the historical precipitation data from 1991 to 2011, and combined with the Rodriguez-Iturbe soil moisture dynamic stochastic model, we studied the soil moisture dynamics and its probability density function in a revegetated desert area. Results showed that, the annual soil moisture dynamics changed with the rainfall distribution, and the probability distribution showed a single peak-shaped in the plant rhizosphere layer (0-60 cm), the peak width in the topsoil mositure 20 cm was larger than the others, and the distribution also appeared a certain degree of jump. The 40 cm and 60 cm of soil moisture probability distribution peak width was smaller, which was in accordance with the simulation results of Rodriguez-Iturbe model. Those results confirmed that stochastic model also had a good applicability in arid desert areas and could be well used in describing the statistical characteristics of soil moisture.

Key words:  revegetated desert area      soil mositure      Rodriguez-Iturbe model      probability density functions of soil mositure     
Received:  27 May 2012      Published:  02 July 2012
ZTFLH:  S152.75  

Cite this article: 

HUANG Lei1,2, ZHANG Zhi-shan1,2, CHEN Yong-le1,2. Probabilistic Modelling of Soil Moisture Dynamics in a Revegetated Desert Area. JOURNAL OF DESERT RESEARCH, 2013, 33(2): 568-573.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00078     OR     http://www.desert.ac.cn/EN/Y2013/V33/I2/568

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