Soil Property and Morphology of Soil Cracks in Sediment Trap of Gully Badlands in Dry-hot Valley
Abstract：Based on investigation, laboratory analysisand digital image processing, we quantitatively analyzed soil properties and morphology of soil cracksin PJ, PD and PM. We also discussed the effects of soil properties on development of fracture morphology. The results showed that①bulk density and clay content was PD>PJ>PM;soil porosity was PM>PD>PJ;organic matter was PM>PJ>PD. Extreme ratio of soil properties at different lo-cations: the greatest was content of clay (1.94), followed by the organic matter (0.65), soil porosity(0.27)and bulk density (0.09). The difference between soil properties in PJ and PD was due to their different source materi-als and depositions. The PMsoil was mainly affected by vegetation distribution and over-flow-condition.②Lc and K was PD<PJ<PM, Rc, APc and AWMFRAC was PD>PJ>PM. ③Pearson correlation analysis showed that the length density and bulk density (p=-0.782), clay content (p=-0.626) are negatively correlated. The connectivi-ty index was negatively correlated with clay content (p=-0.618). It was showed that the bulk density and clay con-tent played an important role in crack growth. The results could provide a basis for improving degraded soil and vegetation restoration of the gully badlands in Dry-hot valley region.
Keywords：sediment trap areasoil propertiessoil crack's morphological featuregully badlandsdry-hot valley
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 81-86 )