[1]ZENG Rui,ZHANG Tao,PU Junbing,et al.Spatiotemporal Dynamics of Soil Water and Its Influencing Factors Along Transect of Landform in Karst Graben Basin, Southwestern China[J].Research of Soil and Water Conservation,2021,28(01):50-57.
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Spatiotemporal Dynamics of Soil Water and Its Influencing Factors Along Transect of Landform in Karst Graben Basin, Southwestern China
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 01
Page number:
50-57
Column:
Public date:
2021-01-10
- Title:
- Spatiotemporal Dynamics of Soil Water and Its Influencing Factors Along Transect of Landform in Karst Graben Basin, Southwestern China
- Keywords:
- soil water; spatiotemporal heterogeneity; soil texture; precipitation; vegetation; bare rock
- CLC:
- S152.7
- DOI:
- -
- Abstract:
- The hydrological process of soil moisture and its influence factors are the limitation for soil protection and vegetation restoration in the typical rocky desertification area. To explore the dynamic distribution and its influence factors of soil moisture in different slope positions and different depths, high-resolution and long-term monitoring stations were set up in basin, transitional slope, and mountainous area of the Mengzi karst basin in Yunnan Province. The results show that:(1)two major trends in the spatial distribution of soil moisture include that soil moisture increases with the elevation and decreases with the depth of the soil layer;(2)the soil moisture of the fault depression basin in the wet season is much higher than that in the dry season, but the seasonal difference of soil moisture variation is little and changes from weak to moderate variability, which is beneficial to the growth of vegetation;(3)with respect to spatial pattern, the soil moisture variation degree in the basin is higher than that of the slope and mountainous area in the whole year because the initial soil moisture condition; additionally, the soil moisture variation of lower subsoil in the basin and the mountainous area is lower than that in the upper soil due to the soil texture and porosity;(4)the soil moisture changes with precipitation in the three monitoring points, which indicates that precipitation is an important factor affecting soil water variation, and this homogeneity between soil water and precipitation in the basin is better than that of the slope and mountainous area due to soil texture, vegetation and bare rock. The soil moisture exhibits significant and regular spatiotemporal variations and is controlled by the combined influence of soil texture, vegetation and precipitation environment in the Mengzi karst graben basin, Yunnan, which will play the important roles in improving the vegetation restoration and water resources management, and provide the basic data for the control of rocky desertification in karst depression basins.
- References:
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Last Update:
2021-01-15