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Inner Mongolia Agricultural University (内蒙古农业大学) 2021

Dynamic Characteristics of Soil Moisture and Its Influencing Factors in Semi-arid Steppe Basin

张璐

Titre : Dynamic Characteristics of Soil Moisture and Its Influencing Factors in Semi-arid Steppe Basin

Auteur : 张璐

Grade : Master 2021

Université : Inner Mongolia Agricultural University (内蒙古农业大学)

Résumé partiel
Soil moisture(MS)is an important part of the lithosphere,biosphere,atmosphere and hydrosphere,which is the main limiting factor for plant growth in semi-arid steppe.As well,water is the main environmental factor restrictings the growth and distribution of plants in semi-arid areas.Our MS study can provide data support and theoretical support for the optimization of ecological protection measures and further research on ecohydrological processes in steppe watershed.Xilin River Basin(XRB),located in the middle east of Inner Mongolia,was chosen as the study area.Firstly,the meteorological and hydrological conditions in XRB were obtained by using principal component analysis(PCA)and drought index.Based on the result above,the MS and related environmental factors were monitored for a long time with high frequency.Using classical statistics,redundancy analysis(RDA)and Hydrus-1D model,the spatial and temporal dynamics of MS,environmental influencing factors and their temporal simulation were studied.In addition,geostatistics,correlation analysis and multiple linear regressions were used to explore the spatial variation of MS in root layer and its leading factors.What’s more,we deeply analyzeds the relationship between MS and soil organic matter(SOM),vegetation community diversity and biomass

Mots clés : Xilin River Basin(XRB) ;Drought;Soil moisture(MS) ;Environmental factors ;Temporal and spatial variability ;

Présentation (CNKI)

Page publiée le 24 mars 2022