Cost analysis of sand barriers in desertified regions based on the land grid division model

doi:10.1007/s40333-022-0072-2

Journal of Arid Land

2022, Vol. 14

Issue (9): 978-992 DOI: 10.1007/s40333-022-0072-2

Research article

Cost analysis of sand barriers in desertified regions based on the land grid division model

YANG Suchang, QU Zhun(

)

School of Economics, Lanzhou University, Lanzhou 730000, China

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Abstract

Sand barriers are the most widely used mechanical implements for wind-blown sand control and desertification prevention. However, there is no standard quantitative cost analysis of the sizes and materials required for sand barriers. In this study, based on the original land grid division model for optimal resource utilization, we calculated the total side lengths of square and regular hexagonal sand barriers with the sizes of 1.0 m×1.0 m, 2.0 m×2.0 m, and 3.0 m×3.0 m in a desertified region of the Shapotou area on the southeastern edge of the Tengger Desert, China. Then, through literature review and social survey, we obtained the material cost and material utilization amount of sand barriers with different materials and sizes. Finally, we calculated the costs of square and regular hexagonal sand barriers comprised of wheat straw, corn stalk, Salix mongolica, poly lactic acid, magnesium cement, and high-density polyethylene, with the sizes of 1.0 m×1.0 m, 2.0 m×2.0 m, and 3.0 m×3.0 m. The results show that the material cost of regular hexagonal corn stalk sand barriers with the size of 3.0 m×3.0 m is the lowest, while the material cost of square magnesium cement sand barriers with the size of 1.0 m×1.0 m is the highest. When using the same material, the cost of regular hexagonal sand barriers is lower than that of square sand barriers with the same size. When using the same size, the cost of sand barriers with corn stalk material is lower than that of sand barriers with other materials. Based on the above analysis, we can conclude that the economic benefits of regular hexagonal sand barriers are greater than those of square sand barriers. This study provides a theoretical basis for accurately calculating the material cost of sand barriers, particularly for the estimated cost of mechanized sand barrier engineering projects.

Key words： desertification corn stalk sand barrier Salix mongolica land grid division economic cost railway Shapotou area

Received: 16 June 2022 Published: 30 September 2022

Corresponding Authors: ^*QU Zhun (E-mail: quzhun1989@163.com)

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Cite this article:

YANG Suchang, QU Zhun. Cost analysis of sand barriers in desertified regions based on the land grid division model. Journal of Arid Land, 2022, 14(9): 978-992.

URL:

http://jal.xjegi.com/10.1007/s40333-022-0072-2 OR http://jal.xjegi.com/Y2022/V14/I9/978

Fig. 1 Overview of the study area

Fig. 2 Gridding diagram of square sand barriers analyzed in this study. a, the side length of the small square; n_xand n_y are the maximum numbers of squares that can be accommodated in the x-direction and y-direction in a given area, respectively; l_x, the length in the x-direction; l_y, the width in the y-direction.

Fig. 3 Edge length solution diagram of the gridded graph. b, the side length of the small regular hexagons; M, the layer number of the line.

Fig. 4 Square sand barriers with various materials and sizes in different regions of China. (a), square straw sand barriers with the size of 1.0 m×1.0 m and the height of 20 cm in Zhongwei City, Ningxia Hui Autonomous Region; (b), square straw sand barriers with the size of 2.0 m×2.0 m and the height of 20 cm in the Shapotou area section of the Baotou-Lanzhou Railway; (c) square reed sand barriers with the size of 1.0 m×1.0 m and the height of 20 cm along the Taklimakan Desert Highway; (d), square Salix Mongolica sand barriers with the size of 1.5 m×1.5 m in the Shapotou area section of the Baotou-Lanzhou Railway; (e) polylactic acid (PLA) net sand barriers with the size of 1.0 m×1.0 m and the height of 20 cm in Maqu County, Gansu Province; (f), high-density polyethylene (HDPE) net sand barriers with the size of 1.0 m×1.0 m and the height of 20 cm in the section of the Lanzhou-Urumqi High-speed Railway.

Fig. 5 Regular hexagonal magnesium cement sand barriers in the Shapotou area section of the Baotou-Lanzhou Railway. (a), regular hexagonal magnesium cement sand barriers with the size of 1.0 m×1.0 m and the height of 20 cm in the Shapotou area section of the Baotou-Lanzhou Railway before sand burial; (b) regular hexagonal magnesium cement sand barriers with the size of 1.0 m×1.0 m and the height of 20 cm in the Shapotou area section of the Baotou-Lanzhou Railway after sand burial.

Sand barrier type	Size	Unit material utilization amount (kg/m)	Total length (m/667.0 m²)	Total material utilization amount (kg/667.0 m²)	Unit material cost (CNY/kg)	Total material cost (CNY/667.0 m²)
Square wheat straw sand barrier	1.0 m×1.0 m	0.53	1394.0	738.82	0.90	664.94
	2.0 m×2.0 m	0.53	726.0	384.78	0.90	346.30
	3.0 m×3.0 m	0.53	504.0	267.12	0.90	240.41
Regular hexagonal wheat straw sand barrier	1.0 m×1.0 m	0.53	936.0	496.08	0.90	446.47
	2.0 m×2.0 m	0.53	568.5	301.31	0.90	271.18
	3.0 m×3.0 m	0.53	434.0	230.02	0.90	207.02
Square corn stalk sand barrier	1.0 m×1.0 m	0.59	1394.0	822.46	0.65	534.60
	2.0 m×2.0 m	0.59	726.0	428.34	0.65	278.42
	3.0 m×3.0 m	0.59	504.0	297.36	0.65	193.28
Regular hexagonal corn stalk sand barrier	1.0 m×1.0 m	0.59	936.0	552.24	0.65	358.96
	2.0 m×2.0 m	0.59	568.5	335.42	0.65	218.02
	3.0 m×3.0 m	0.59	434.0	256.06	0.65	166.44
Square Salix Mongolica sand barrier	1.0 m×1.0 m	0.30	1394.0	422.38	7.50	3167.85
	2.0 m×2.0 m	0.30	726.0	220.00	7.50	1650.00
	3.0 m×3.0 m	0.30	504.0	152.71	7.50	1145.33
Regular hexagonal S. mongolica sand barrier	1.0 m×1.0 m	0.30	936.0	283.61	7.50	2127.08
	2.0 m×2.0 m	0.30	568.5	172.26	7.50	1291.95
	3.0 m×3.0 m	0.30	434.0	131.50	7.50	986.25
Square PLA net sand barrier	1.0 m×1.0 m	0.02	1394.0	27.90	100.00	2790.00
	2.0 m×2.0 m	0.02	726.0	14.52	100.00	1452.00
	3.0 m×3.0 m	0.02	504.0	10.08	100.00	1008.00
Regular hexagonal PLA net sand barrier	1.0 m×1.0 m	0.02	936.0	18.72	100.00	1872.00
	2.0 m×2.0 m	0.02	568.5	11.37	100.00	1137.00
	3.0 m×3.0 m	0.02	434.0	8.68	100.00	868.00
Square HDPE net sand barrier	1.0 m×1.0 m	0.03	1394.0	34.85	50.00	1742.50
	2.0 m×2.0 m	0.03	726.0	18.15	50.00	907.50
	3.0 m×3.0 m	0.03	504.0	12.60	50.00	630.00
Regular hexagonal HDPE net sand barrier	1.0 m×1.0 m	0.03	936.0	23.40	50.00	1170.00
	2.0 m×2.0 m	0.03	568.5	14.21	50.00	710.50
	3.0 m×3.0 m	0.03	434.0	10.85	50.00	542.50
Regular hexagonal magnesium cement board sand barrier	1.0 m×1.0 m	10.00	1394.0	13,940.00	0.40	5576.00
	2.0 m×2.0 m	10.00	726.0	7260.00	0.40	2904.00
	3.0 m×3.0 m	10.00	504.0	5040.00	0.40	2016.00
Regular hexagonal magnesium cement board sand barrier	1.0 m×1.0 m	10.00	936.0	9360.00	0.40	3744.00
	2.0 m×2.0 m	10.00	568.5	5685.00	0.40	2274.00
	3.0 m×3.0 m	10.00	434.0	4340.00	0.40	1736.00

Table 1 Cost calculation results for different types of sand barriers


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