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Journal of Arid Land
Journal of Arid Land  2023, Vol. 15 Issue (2): 180-190    DOI: 10.1007/s40333-023-0005-8
Research article     
Sediment yield and erosion-deposition distribution characteristics in ephemeral gullies in black soil areas under geocell protection
WANG Xinyu1, SU Yu1, SUN Yiqiu1, ZHANG Yan2, GUAN Yinghui2, WANG Zhirong1, WU Hailong1,*()
1School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
2School of Soil and Water Conservation, Beijing Forestry University, Beijing 100038, China
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Abstract  

Investigating the effect of geocells on the erosion and deposition distribution of ephemeral gullies in the black soil area of Northeast China can provide a scientific basis for the allocation of soil and water conservation measures in ephemeral gullies. In this study, an artificial simulated confluence test and stereoscopic photogrammetry were used to analyze the distribution characteristics of erosion and deposition in ephemeral gullies protected by geocells and the effect of different confluence flows on the erosion process of ephemeral gullies. Results showed that when the confluence flow was larger, the effect of geocell was more evident, and the protection against ephemeral gully erosion was stronger. When the confluence flow rates were 0.6, 1.8, 2.4, and 3.0 m3/h, ephemeral gully erosion decreased by 37.84%, 26.09%, 21.40%, and 35.45%. When the confluence flow rates were 2.4 and 3.0 m3/h, the average sediment yield rate of the ephemeral gully was close to 2.14 kg/(m2?min), and the protective effect of ephemeral gully erosion was enhanced. When the flow rate was higher, the surface fracture of the ephemeral gully was more serious. With an increase in confluence flow rate, the ratio of erosion to deposition increased gradually, the erosion area of ephemeral gullies was expanded, and erosion depth changed minimally. In conclusion, geocell measures changed erosion patterns by altering the rill erosion/deposition ratio, converting erosion from rill erosion to sheet erosion.

Key words： geocell      erosion and deposition distribution      runoff and sediment production      ephemeral gully      soil conservation     
Received: 23 July 2022      Published: 28 February 2023
Corresponding Authors: *WU Hailong (E-mail: wuhailong@email.tjut.edu.cn)
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WANG Xinyu
SU Yu
SUN Yiqiu
ZHANG Yan
GUAN Yinghui
WANG Zhirong
WU Hailong
Cite this article:

WANG Xinyu, SU Yu, SUN Yiqiu, ZHANG Yan, GUAN Yinghui, WANG Zhirong, WU Hailong. Sediment yield and erosion-deposition distribution characteristics in ephemeral gullies in black soil areas under geocell protection. Journal of Arid Land, 2023, 15(2): 180-190.

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http://jal.xjegi.com/10.1007/s40333-023-0005-8     OR     http://jal.xjegi.com/Y2023/V15/I2/180

Fig. 1 An illustration of the experimental device. (a), soil flume; (b), pre-rainfall test; (c), flow rate test.
Fig. 2 (a), geocells used in the experiment; (b), geocells exposed from the ground during the experiment.
Flow rate (m3/h) Measure Slope (°) Experiment repetition
0.6
1.8
2.4
3.0		 Control group
Geocell		 7 2
Table 1 Details of the experimental design
Fig. 3 Experimental soil profile
Fig. 4 Sediment yield in the ephemeral gully protected by geocell under different flow rates. (a), 0.6 m3/h; (b), 1.8 m3/h; (c), 2.4 m3/h; (d), 3.0 m3/h.
Fig. 5 Erosion pattern of ephemeral gully protected by geocell under different flow rates. (a), 0.6 m3/h; (b), 1.8 m3/h; (c), 2.4 m3/h; (d), 3.0 m3/h. DEM, digital elevation model.
Flow rate
(m3/h)		 Control group Geocell Reduced
erosion
(%)
Erosion proportion
(%)		 Deposition proportion
(%)		 Average sediment yield rate
(kg/(m2•min))		 Erosion proportion
(%)		 Deposition proportion (%) Average sediment yield rate
(kg/(m2•min))
0.6 90.59 9.41 2.22 22.27 77.73 1.38 37.84
1.8 73.58 26.42 2.21 44.15 55.85 1.70 23.08
2.4 85.03 14.97 2.71 62.33 37.67 2.13 21.40
3.0 84.56 15.44 3.30 88.75 11.25 2.14 35.45
Table 2 Soil erosion-deposition proportion of ephemeral gully protected by geocell under different flow rates
Fig. 6 Erosion-deposition classification of ephemeral gully protected by geocell under different flow rates
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