Anthropogenic Influences on Soil Erosion since the Late Holocene and Contrasting Regional Sustainability in China

Guocheng Zhang, Qu Chen, Jueqi Guan, Guoyong Zhao and Wei Wang
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Guocheng Zhang: College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
Qu Chen: College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
Jueqi Guan: Department of Educational Technology, Zhejiang Normal University, Jinhua 321004, China
Guoyong Zhao: School of Geographical Sciences, Xinyang Normal University, Xinyang 464000, China
Wei Wang: College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China

Sustainability, 2022, vol. 14, issue 11, 1-16

Abstract: A multi-disciplinary investigation of loess sections in the southeast and northwest of the Chinese Loess Plateau (CLP) and a sediment core drilled in Zhejiang Province of southeast China was conducted. Discrepancies among grain size distribution, rock magnetic properties, geochemical characteristics and chroma features, and up-section weakening relation between various proxies in the Sanmenxia loess section were found. The results were compared with those of the Baicaoyuan loess section in the northwest of the CLP and the sediment records across the plateau and elsewhere. It was suggested that human impacts began to increase soil erosion on the CLP since the middle Holocene. In addition to the increased soil erosion being decoupled from drying climate after 4 ka, renewed intensification of soil erosion was suggested to occur within the interval of 1.5–2.5 ka as a result of enhanced human activities. The two detected increases in human-induced soil erosion on the CLP are consistent with the human-driven land use changes or human–land interactions at national or regional scales, including the anthropogenic influences on the changes in the sediment load of the Yellow River. In contrast, no human impacts overwhelming hydroclimate control of soil erosion was revealed in the Beihuqiao cores, Zhejiang. The population growth during the past 2400 years showed a relative decreasing trend on CLP and a relative increasing trend in Zhejiang. It is indicated that anthropogenic factors have played a key role in modulating the Earth’s surface environment. In particular, ecologically fragile areas, such as the CLP, would be much more susceptible to human disturbance and climate change. The current serious land degradation on the CLP mainly results from the negative feedback between human–land interactions. Regional heterogeneity should be taken into account for sustainable development.

Keywords: soil erosion; loess; Loess Plateau; Holocene; climate change; population (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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