⁷Be distribution in surface soil of central Guizhou karst region and its erosion trace Academic Article

abstract

• Soil erosion in karst region of south China is one of the major environmental problems. Beryllium-7, produced by energetic cosmic rays, has been used to trace the geochemical process of the soil erosion. The study has shown that7Be activity profiles present a decreasing logarithmic pattern with soil depth. The maximum permeable depth of7Be is 2-5 mm in different seasons and locations, which is deeper in autumn than in spring. On the contrary, its apparent activity on boundary soil is higher in spring than in autumn. The7Be inventories in soil cores are higher in accumulative locations than in eroded one. Upper hills in the karst region are seriously eroded. Erosive intensity is higher in rainy periods than in dry ones. Influenced by the micromorphology and precipitation, the eroded particles accumulated in shallow basin after a short-distance transportation in winter and spring. However, in summer and autumn, they might be transported into drainage systems.

authors

• Santschi, Peter

published proceedings

• Progress in Natural Science

author list (cited authors)

• Bai, Z., Wan, G., Wang, C., Wan, X., Huang, R., Santschi, P. H., & Baskaran, M.

complete list of authors

• Bai, Z||Wan, G||Wang, C||Wan, X||Huang, R||Santschi, PH||Baskaran, M

publication date

• December 1996

published in

• Progress in Natural Science: communication of state key laboratories of China  Journal

start page

• 709

end page

• 710

volume

• 6

issue

• 6