Abstract
In recent years, the role of human activities in changing sediment yield has become more apparent for the construction of hydraulic engineering and water conservation projections in the Upper Yangtze River, but it has not been evaluated at the macro scale. Taking Sichuan Province and Chongqing City as an example, this paper studies the relationship between socio-economic factors and sediment yield in the Upper Yangtze River based on section data in 1989 and 2007. The results show that sediment yield is significantly correlated with population density and cultivated area, in which the former appears to be more closely related to sediment yield. Moreover, in the relation of sediment yield vs. population density, a critical value of population density exists, below which the sediment yield increases with the increase of population density and over which the sediment yield increases with the decrease of population density. The phenomenon essentially reflects the influence of natural factors, such as topography, precipitation and soil property, and some human activities on sediment yield. The region with a higher population density than critical value is located in the east of the study area and is characterized by plains, hills and low mountains, whereas the opposite is located in the west and characterized by middle and high mountains. In the eastern region, more people live on the lands with a low slope where regional soil erosion is slight; therefore, sediment yield is negatively related with population density. In contrast, in the western region, the population tends to aggregate in the areas with abundant soil and water resources which usually lead to a higher intensity of natural erosion, and in turn, high-intensity agricultural practices in these areas may further strengthen local soil erosion. It is also found that population tends to move from the areas with bad environment and high sediment yield to the areas with more comfortable environment and less sediment yield. The natural factors have greater influence on sediment yield of western region than that of eastern region. Generally, the natural factors play a dominant role on sediment yield in the Upper Yangtze River.
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References
Arnalds O, Barkarson B H, 2003. Soil erosion and land-use policy in Iceland in relation to sheep grazing and government subsidies. Environ. Sci. Policy, 6(1): 105–113.
Chen Songsheng, Zhang Ouyang, Chen Zefang, 2008. Variations of runoff and sediment load of the Jinsha River. Advances in Water Science, 19(4): 475–482. (in Chinese)
Dai S B, Yang S L, Li M, 2009. The sharp decrease in suspended sediment supply from China’s rivers to the sea: Anthropogenic and natural causes. Hydrological Sciences Journal-Journal-des Sciences Hydrologiques, 51(1): 135–146.
Dong Yaohua, Hui Xiaoxiao, Lin Qiusheng, 2008. Preliminary analysis on characteristics and changing tendency of annual runoff and sediment load of Changjiang River main channels. Journal of Yangtze River Scientific Research Institute, 25(2): 16–20. (in Chinese)
Du Jun, Shi Changxing, Zhang Shouhong et al., 2010. Impact of human activities on recent changes in sediment discharge of the upper Yangtze River. Progress in Geography, 29(1): 15–22. (in Chinese)
Evans R. 1995. Soil erosion and land use: Towards a sustainable policy. In: Proceedings of the Cambridge Environmental Initiative Professional Seminar, Series No.7. Cambridge University Committee for Interdisciplinary Environmental Studies. Cambridge: White Horse Press, 14–26.
Fu Suhua, 2005. Effect of soil containing rock fragment on infiltration. Journal of Soil and Water Conservation, 19(1): 171–175. (in Chinese)
John Boardman, Jean Poesen, Robert Evans. 2003. Socio-economic factors in soil erosion and conservation. Environmental Science & Policy, 6: 1–6.
Lei Xiaozhang, Huang Lilong, 1991. Discussion of soil erosion mechanism in some areas of the upper Yangtze River. Journal of Sichuan Forestry Science and Technology, 12(4): 9–16. (in Chinese)
Li Huixia, Liu Shuzhen, He Xiaorong et al., 2004. Relation between land use change and soil erosion change: Taking the midtown of Suining City as an example. Bulletin of Soil and Water Conservation, 24(4): 10–13. (in Chinese)
Liu Quan, Wang Zhongjing, 2004. Study on changes of soil erosion under different land use patterns in Liao River basin based on GIS. Journal of Soil and Water Conservation, 18(4): 105–107. (in Chinese)
Liu Songbo, Zhuang Chunlan, Meng Linlin, 2009. Response of slope to slope erosion and sediment yield. Soil and Water Conservation in China, (5): 44–47. (in Chinese)
Lu X X, Higgitt D L, 1998. Recent changes of sediment yield in the upper Yangtze, China. Environmental Management, 22(5): 697–709.
Lu X X, Higgitt D L, 1999. Sediment yield variability in the upper Yangtze, China. Earth Surface Process and Landforms, 24(12): 1077–1093.
Lv Yao; Zhang Yushu, 2007. Identification, evaluation and internalization of externalities of agriculture. Progress in Geography, 26(1): 123–132. (in Chinese)
Ma Ronghua, Pu Yingxia, Ma Xiaodong, 2007. Developing the Spatial Association Pattern based on GIS. Beijing: Science Press. (in Chinese)
Shi Changxing, 2008. Scaling effects on sediment yield in the upper Yangtze River. Geographical Research, 27(4): 800–810. (in Chinese)
Shi Changxing, Du Jun, 2009. Causes for stepped changes of sediment load in the upper Yangtze River. Journal of Sediment Research, (4): 17–24. (in Chinese)
United States Department of Agriculture, 1990. EPIC-Erosion/Productivity Impact Calculator 1. Model Documentation Technical Bulletin Number 1768, Washington D C, USDA-ARS.
Walling D E, Fang D, 2004. Recent trends in the suspended sediment loads of the world’s rivers. Global and Planetary Change, 39(1/2): 111–126.
Wang Zhaoyin, Huang Wendian, Li Yitian, 2007. Sediment budget of the Yangtze River. Journal of Sediment Research, (2): 1–10. (in Chinese)
Xu Jiongxin, 2005. Variation in grain size of suspended load in upper Changjiang River and its tributaries by human activities. Journal of Sediment Research, (3): 8–16. (in Chinese)
Xu Jiongxin, 2006. Effect of the changing rural socio-economic factors on sediment yield of the Jialinjiang River basin. Journal of Mountain Science, 24(4): 385–394. (in Chinese)
Xu Jiongxin, 2009. Recent variations in water and sediment in relation with reservoir construction in the upper Changjiang River basin. Journal of Mountain Science, 27(4): 385–393. (in Chinese)
Xu Jiongxin, Sun Ji, 2007. Sediment yield in major sediment source areas of the upper Changjiang River basin in response to human activities. Scientia Geographica Sinica, 27(2): 211–218. (in Chinese)
Xu Jiongxin, Sun Ji, 2008. Temporal variation in suspended sediment concentration of the upper Changjiang River and its tributaries. Geographical Research, 27(2): 332–342. (in Chinese)
Xu Kehui, Milliman J D, 2009. Seasonal variations of sediment discharge from the Yangtze River before and after impoundment of the Three Gorges Dam. Geomorphology, 104(3/4): 1–8.
Xu Quanxi, Shi Guoyu, Chen Zefang, 2004. Analysis of recent changing characteristics and tendency runoff and sediment transport in the upper reach of Yangtze River. Advances in Water Science, 15(4): 420–426. (in Chinese)
Yang Shilun, Zhao Qingying, Belkin Igor M, 2002. Temporal variation in the sediment load of the Yangtze River and the influences of human activities. Journal of Hydrology, 263: 56–71.
Yu Feng, Li Xiaobing, Chen Yunhao et al., 2006. Land use change and soil erosion evaluation in Huangfuchuan Watershed. Acta Ecologica Sinica, 26(6): 1947–1956. (in Chinese)
Zhang Xinbao, Wen Anbang, 2002. Variations of sediment in upper stream of Yangtze River and its tributary. Journal of Hydraulic Engineering, (4): 56–59. (in Chinese)
Zhou Qinghua, 2003. The soil erosion by line type projects and its control methods. South to North Water Transfers and Water Science & Technology, 1(3): 41–46. (in Chinese)
Zhu Y J, Shao M A, 2008. Spatial distribution of surface rock fragment on hill-slopes in a small catchment in wind-water erosion crisscross region of the Loess Plateau. Science in China (Series D), 51(6): 862–870. (in Chinese)
Zhu Y M, Lu X X, Zhou Y, 2008. Sediment flux sensitivity to climate change: A case study in the Longchuanjiang catchment of the upper Yangtze River, China. Global and Planetary Change, 60(3/4): 429–442.
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Foundation: Commonweal Special Project of the Ministry of Water Resources of China, No.2007SHZ0901034; National Natural Science Foundation of China, No.40971012
Author: Du Jun (1983–), Ph.D Candidate, specialized in sediment yield of the Upper Yangtze River.
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Du, J., Shi, C., Fan, X. et al. Impacts of socio-economic factors on sediment yield in the Upper Yangtze River. J. Geogr. Sci. 21, 359–371 (2011). https://doi.org/10.1007/s11442-011-0850-9
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DOI: https://doi.org/10.1007/s11442-011-0850-9