Historical environmental changes in the Poyang Lake basin (Yangtze River, China) and impacts on agricultural activities

Author:

He Maofeng1ORCID,Bu Fengxian1,Delang Claudio O2,Xie Jialin1,Ye Quan3,Zhao Hongfei45ORCID,He Qilin5,He Wenming6

Affiliation:

1. Northwest Institute of Historical Environment and Socio-Economic Development, Shaanxi Normal University, P.R. China

2. Department of Geography, Faculty of Social Sciences, Hong Kong Baptist University, P.R. China

3. School of Geographic Sciences, East China Normal University, P.R. China

4. State of Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, P.R. China

5. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, P.R. China

6. Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas, School of Chemistry and Environment, Jiaying University, P.R. China

Abstract

Climate change and human activities have been an important part of studies regarding historical environmental changes in China over the past 2000 years. In this study, we focused on environmental changes, that is, natural disasters and human activities, in the Poyang Lake Basin over the past 2000 years, to analyze interactions between land use cover changes and human activities from the perspective of regional sustainable development. We collected historical records of climate and hydrology, floods and droughts, and rivers and lakes in the Poyang Lake area, and established time sequences for the floods and droughts, lake water level and lake area, amount of farming land, and population, in order to discuss interactions between changes in the environment and the climate, with emphasis on the impacts of extreme events on lake and river basin environment changes. The following results were obtained. First, climate changes in historical periods had wide-ranging and far-reaching impacts on agricultural production, especially disasters caused by climate change. Among the changes in the Poyang Lake basin environment, including river network systems, lake water levels, etc., changes in lake water volume are direct evidence of climate change, adaptation to climate change, and obvious phased characteristics. Second, in the process of changes to the lake and river network in the Poyang Lake Basin, social and economic development is accompanied by evolution of the lake. Increases and decreases in population, the scale of agricultural production, and lake environment changes have direct and significant interactions. Third, the Poyang Lake basin’s environmental changes during the historical period are mainly reflected in the pressure feedback mode of “population–agriculture” in the lake environment.

Funder

national social science fund of china

Key Platforms and Scientific Research Projects in Universities in Guangdong Province of China

Guangdong Rural Science and Technology Commissioner Project of China

Publisher

SAGE Publications

Subject

Paleontology,Earth-Surface Processes,Ecology,Archeology,Global and Planetary Change

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