Response of soil water movement to rainfall under different land uses in karst regions

نویسندگان

چکیده

Soil water is a critical factor closely related to hydrological and ecological processes. Owing the complex surface conditions with heterogeneous soil thickness abundant underlying fissures, in karst region has been complicated issue. In this study, dynamic changes of vertical profile selected grassland, farmland bare land on yellow hillslope southwest China were monitored at five depths including 20, 40, 60, 80 100 cm an interval 15 min. Results showed that (1) there spatial differences response rainfall content different depths. When amount was similar, replenishment migration depth under three uses decreased intensity. case light rainfall, 20 most sensitive mainly occurred 0–40 cm. moderate heavy could migrate down grassland but less than intensity rainfall. (2) The variation had interlayer over time. layers multipeak fluctuations. general, when same, fluctuation same larger land; however, peak value depth. (3) Land use antecedent important effects loss during dry period. faster beginning before slowing down. rate increased length period, gradually land. These results can support utilization protection resources slopes help understand temporal dynamics natural

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ژورنال

عنوان ژورنال: Environmental Earth Sciences

سال: 2023

ISSN: ['2199-9163', '2199-9155']

DOI: https://doi.org/10.1007/s12665-022-10734-w