Quantificational research on the slope development of loess tableland in the Holocene

2011 International Conference on Remote Sensing, Environment and Transportation Engineering Pub Date : 2011-06-24 DOI:10.1109/RSETE.2011.5965028

Gang Liu, Pu-ling Liu, Qiong Zhang, Wennian Xu

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Abstract

It is important approach to recognize natural evolution of environment on the Chinese Loess Plateau that 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 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 12000 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 0.0162cm/a during 12295∼20416 a B.P‥ The slope landform had formed before about 12000 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, which was the comprehensive result of natural erosion and artificial acceleration 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.

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全新世黄土塬坡发育的定量研究

全新世黄土地貌与土壤侵蚀演变研究是认识中国黄土高原环境自然演变的重要途径。本文利用陕北延长县黄土塬区及其相邻边坡的YCT和YCS剖面的土壤放射性碳年龄、黄土沉积速率和磁化率，重建了该边坡约12000 a B.P.的地貌。结果表明，YCT剖面在全新世的平均黄土沉积速率为0.0153 cm/a, YCS剖面在12295 ~ 20416 a b.p.之间的平均黄土沉积速率为0.0162cm/a，该斜坡地貌形成于约12000 a b.p.之前，但其坡度小于现代斜坡。坡面土壤侵蚀速率大于黄土沉积速率，是自然侵蚀和人工加速侵蚀综合作用的结果。结果表明，该方法可用于地质时期黄土地貌与土壤侵蚀的定量研究，为黄土地貌与土壤侵蚀的定量研究提供了新的思路和方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 International Conference on Remote Sensing, Environment and Transportation Engineering

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