Title: Analysis of Spatial Variability of Soil Moisture and its Driving Force Factors in the Shaanxi-Henan Region along the Yellow River
Abstract: Based on the observed soil moisture data at 33 agro-meteorological stations in the Shaanxi-Henan region along the Yellow River from 1992 to 2005,the vegetation available soil moisture in the unit of depth at 10,20 and 50 cm soil layer is calculated.It is found that soil moisture shows strong spatial variability with the values increasing from northwest,Shaanxi to south,east and southeast,Henan.Soil moisture is low in the loess plateau,with the minimum value at Suide station,Shaanxi Province.Soil moisture is rich in the south of Shaanxi and Henan,with the maximum at Xinyang station,Henan Province.The vertical variation of soil moisture is not obvious.By using linear correlation analysis between the soil moisture and the influential factors,it is found that there is an obvious positive correlation between soil moisture and field capacity and negative correlation between soil moisture and latitude.The correlation between soil moisture and irrigation is stronger than the correlation between soil moisture and precipitation.The correlations between soil moisture and density,longitude and elevation above sea level are weak.By using principal component analysis,it is found that the driving force of soil moisture is not just as vegetation,soil or climate factor.It is the combination of such multiple factors to drive the spatial variability of soil moisture.The comprehensive effect of all the influential factors on soil moisture shows obvious spatial variability.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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Cited By Count: 4
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