Journal of Food, Agriculture and Environment

Slope development of tableland in the Holocene on the Chinese Loess Plateau

Author(s):

Gang Liu ^{1*, 2, 3}, Wennian Xu ¹, Puling Liu ², Mingyi Yang ², Chongfa Cai ³, Qiong Zhang ¹

Recieved Date: 2012-01-27, Accepted Date: 2012-05-04

Abstract:

It is an important approach to recognize natural evolution of environment on the Chinese Loess Plateau in researches on evolution of loess landform and soil erosion in the Holocene. In this study, radiocarbon age of soil, loess deposition rate and magnetic susceptibility of soil from YCT and YCS profiles which, respectively, located on loess tableland and an adjacent slope in Yanchang County in northern Shaanxi, were used to reconstruct the landform at about 12,000 a B.P. on the slope. The results indicated that the average loess deposition rate of YCT profile in the Holocene was 0.0153 cm/a, and that of YCS profile was 0.0162 cm/a during 12,295~20,416 a B.P. The slope landform was formed before about 12,000 a B.P., but its gradient was smaller than the modern slope. So the soil erosion rate greater than the loess deposition rate on the slope was the comprehensive result of natural erosion and artificial acceleration of erosion. It was proved that this method could be used to quantificational research on loess landform and soil erosion in the geological period, and provided a new idea and method in this study area. 

Keywords:

Loess deposition rate, magnetic susceptibility, loess landform, the Holocene,  ¹⁴C age

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Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 2
Category: Environment
Pages: 1164-1167

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