›› 2014, Vol. 53 ›› Issue (5): 134-141.

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Spatiotemporal Variations of Soil Moisture Across Shanxi Province During 2003-2012

HAO Zhenchun1,WANG Hui1,DUNZHU Jiacuo2,JU Qin1   

  1. 1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China
    2.Hydrology Bureau of Tibet Autonomous Region, Lhasa 850000 ,China
  • Received:2014-01-13 Online:2014-09-25 Published:2014-09-25

Abstract: Temporal and spatial variations of soil moisture in Shanxi Province are analyzed by using Inverse Distance Weighted (IDW) method with ArcGIS software package, based on soil moisture and precipitation data from 64 monitoring stations during 2003-2012..The annual and seasonal variations in soil moisture are obtained, and influences of precipitation and temperature changes on soil moisture are investigated using correlation analysis technique. The results indicate that soil moisture is high in the southeast Shanxi, and low in the north and south parts of the Shanxi province. All soil moistures at 10, 20 and 40 cm soil depth show similar variation feature to spatial patterns, but with a less variability in soil moisture at lower soil layer. Moreover, soil moisture tends to increase from the upper to the lower soil profile. There are no clear interdecadal change but obvious seasonal change in soil moisture, decreasing from March, becoming increase in June, and then decreasing again from October. Precipitation plays a key role in spatiotemporal variations of moisture and influences of temperature on soil moisture are moderate.

Key words: soil moisture, temporal and spatial variation, precipitation, Shanxi Province

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