Soil erosion effects on soil organic carbon and an assessment within China

Yunfeng Hu; Jiyuan Liu; Dafang Zhuang; Shaoqiang Wang; Fengting Yang; Siqing Chen

doi:10.1117/12.558631

9 November 2004 Soil erosion effects on soil organic carbon and an assessment within China

Yunfeng Hu, Jiyuan Liu, Dafang Zhuang, Shaoqiang Wang, Fengting Yang, Siqing Chen

Proceedings Volume 5544, Remote Sensing and Modeling of Ecosystems for Sustainability; (2004) https://doi.org/10.1117/12.558631
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Soil erosion is a widespread geological process with strong capabilities to entrap, transport, and redistribute surface soil. It is important to grade erosion intensity and estimate eroded soil mass. On the other hand, soil organic carbon pool (SOC), as the largest terrestrial carbon content, is prone to be affected by soil erosion. Soil erosion redistributes surface soil over landscape, and changes the physical environmental conditions. The consequences are depletion of SOC in eroded regions, emission of carbon dioxide during transportation and input of extra SOC in deposited sites. This paper quantified the effects of soil erosion on soil organic carbon through following three steps: firstly, soil erosion type and soil erosion intensity was determined by interpreting Landsat TM images. Secondly, through field investigation, soil type and soil profile data were collected, and SOC contents in the 0-20cm layers were constructed. Finally, supported by map algebra in Geographic Information System (GIS), soil organic carbon loss induced by soil erosion was calculated based on the national soil erosion modulus standard. Total annual SOC loss in China was about 1.595×10⁸ ton−C yr−¹. Assuming 20% of SOC was oxidized, erosion induced CO₂ emission was about 3.19×10⁷ ton−Cyr−1.

Citation Download Citation

Yunfeng Hu, Jiyuan Liu, Dafang Zhuang, Shaoqiang Wang, Fengting Yang, and Siqing Chen "Soil erosion effects on soil organic carbon and an assessment within China", Proc. SPIE 5544, Remote Sensing and Modeling of Ecosystems for Sustainability, (9 November 2004); https://doi.org/10.1117/12.558631

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