Aeolian Deposition in the Protective System of Shaopotou Section of the Baotou-Lanzhou Railway

doi:10.7522/j.issn.1000-694X.2013.00280

JOURNAL OF DESERT RESEARCH

2014, Vol. 34

Issue (1): 16-22 DOI: 10.7522/j.issn.1000-694X.2013.00280

Aeolian Deposition in the Protective System of Shaopotou Section of the Baotou-Lanzhou Railway

Zhang Jiaqiong¹, Zhang Chunlai¹, Wu Xiaoxu¹, Li Juncheng²

1. State Key Laboratory of Earth Surface Processes and Resource Ecology/MOE Engineering Center of Desertification and Blown-sand Control, Beijing Normal University, Beijing 100875, China;
2. Jinniu District Environmental Protection Agency of Chengdu, Chengdu 610036, China

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Abstract This paper investigated spatial and temporal distribution of the aeolian deposition in the protective system of Shapotou section of Baotou-Lanzhou Railway and analyzed the deposition rate, grain size composition and material source. The results show that the deposition rate is 108.6, 17.1 kg·m^-2·a^-1 and 1.5 kg·m^-2·a^-1 in the front moving sand area, the area of protective distance between 50 m and 300 m and the area of protective distance larger than 300 m in the protective system, respectively. The grain size of the aeolian deposition increases along the cross section and the sorting gets worse. The content of suspension particles increases while that of the saltation particle decreases with undulation caused by the fixed and semi-fixed dunes in the protective system. The aeolian deposition concentrates from March to May and reduces from June to August, whereas the other months experience the least deposition. The monthly aeolian deposits in the protective system during these three durations are 0.59, 0.1 kg·m^-2 and 0.04 kg·m^-2, respectively. The main source of the aeolian deposition from March to May is the saltation sands from the adjacent upwind moving sand area. Dust fall increases relatively and the sands from the adjacent upwind moving sand area reduce from June to August. From September to February of the next year, dust fall transported from long distance areas becomes the main source of the aeolian deposition.

Key words: protective system aeolian deposition grain size material source temporal and spatial distribution

Received: 25 February 2013 Published: 20 January 2014

ZTFLH:

X169

Corresponding Authors: 张春来，clzhang@bnu.edu.cn E-mail: clzhang@bnu.edu.cn



	Articles by authors
	Zhang Jiaqiong
	Zhang Chunlai
	Wu Xiaoxu
	Li Juncheng

Cite this article:

Zhang Jiaqiong, Zhang Chunlai, Wu Xiaoxu, Li Juncheng. Aeolian Deposition in the Protective System of Shaopotou Section of the Baotou-Lanzhou Railway. JOURNAL OF DESERT RESEARCH, 2014, 34(1): 16-22.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00280 OR http://www.desert.ac.cn/EN/Y2014/V34/I1/16

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