[1]LI Yan-mei,WANG Ke-qin,CHEN Qi-bo,et al.Effect of Reconstructed Micro-slope on Soil Moisture Dynamics Parameter in Jinshajiang Dry-Hot River Valley[J].Research of Soil and Water Conservation,2008,15(04):19-23.
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Effect of Reconstructed Micro-slope on Soil Moisture Dynamics Parameter in Jinshajiang Dry-Hot River Valley
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
15
Number of periods:
2008 04
Page number:
19-23
Column:
Public date:
2008-08-20
- Title:
- Effect of Reconstructed Micro-slope on Soil Moisture Dynamics Parameter in Jinshajiang Dry-Hot River Valley
- CLC:
- S714.2;S715
- DOI:
- -
- Abstract:
- Taking reconstructed micro-slope on typical slope in Yuanmou dry-hot river valley as research object, by monitoring soil water dynamics, this paper analyzes and calculates soil water characteristic curve, soil water flux, conductivity and diffusivity of reconstructed micro-slope with soil water dynamics principle and water equilibrium principle. The results show that reconstructed micro-slope enhances the permeating of rain, contour terrace and contour trench could respectively converse 89% and 83% rainfall into soil water, but natural slope only could converse 22% rainfall into soil water. Soil water mainly permeates at perpendicular direction, and moves upward on zero flux noodles, gets down under zero flux noodles after concentration rain. Reconstructing micro-slope makes the speed of water movement increase, and the biggest speed increased 15~17 cm/d. With the depth increases of soil profile, the lost of soil water on the side increases correspondently. The intercepted rain of contour terrace and contour trench can be assigned in 0-200 cm soil layer, contour terrace on gentle slop may make water under 0-100 cm soil layer increase obviously, and the permeating water of natural slop mainly is assigned in 0-100 cm soil layer, water under 0-100 cm soil layer always keeps very low.
- References:
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1900-01-01