Effects of ridge height and spacing on the near-surface airflow field and on wind erosion of a sandy soil: Results of a wind tunnel study

Jia, Wenru; Zhang, Chunlai; Zou, Xueyong; Cao, Hong; Kang, Liqiang; Liu, Bo; Li, Jifeng; Shen, Yaping; Liu, Wei; Fang, Yue; Li, Huiru

doi:10.1016/j.still.2018.10.005

Cited by 16 publications

(13 citation statements)

References 22 publications

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“…Lima et al (2017) concluded by the numerical simulations that an array fence needed at least 4 rows with an equal interval. Jia et al (2019) reported that when the row space was smaller than 5H, the wind velocity between adjacent rows in the near-surface changed slightly. And other studies also showed that the inter-row wind barriers presented a stronger reduction to wind velocities at a given distance (Cook andGoyens, 2008, Ma et al, 2010;Refahi, 2012, Wu et al, 2015Li et al, 2018),…”

Section: Discussionmentioning

confidence: 99%

Effects of Row Spaces on Windproof Effectiveness of Simulated Shrubs With Different Form Configurations

Pan

Wang

Gao

et al. 2021

Earth and Space Science

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A better understanding of the distribution of the airflow field and wind velocity around the simulated shrubs is essential to provide optimized design and maximize the windproof efficiency of the wind barriers. In this study, a profiling set of Pitot Tubes were used to measure the airflow field and wind velocity of simulated shrubs by wind tunnel simulation. The effects of form configurations and row spaces of simulated shrubs on windproof effectiveness were in-depth analyzed. We come to the following results: The weakening strength to wind velocities of hemisphere-shaped and broom-shaped shrubs at 26.25 cm was mainly concentrated below 2 cm near the basal and 6-14 cm in the middle-upper part, while the spindle-shaped shrubs were at 0.2-14 cm above the canopy, which meant the windproof effect of spindle-shaped shrubs was better than that of hemisphere-shaped and broom-shaped. With the improvement of row spaces, the weakening height to wind velocities of the hemisphere-shaped shrubs at 35 cm was concentrated below 2 cm except for the 6-14 cm at 26.25 cm. The designed windbreaks with Nitraria tangutorum, which reduced the wind velocity among the windbreaks more effectively compared to behind the windbreaks. In the wind control system of Ulan Buh Desert, the hemisphere-shaped windbreak should be applied as near-surface barriers, and the windbreaks of broom-shaped and spindle-shaped can be used as shelterbelts above the near-surface. These analytical findings can offer theoretical guidelines on how to arrange the wind barriers for preventing wind erosion in the most convenient and efficient ways.

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Section: Discussionmentioning

confidence: 99%

Effects of Row Spaces on Windproof Effectiveness of Simulated Shrubs With Different Form Configurations

Pan

Wang

Gao

et al. 2021

Earth and Space Science

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“…The wind erosion rate (Q) was calculated as the amount of wind erosion per unit time in the test conditions. The wind erosion modulus was calculated as the amount of wind erosion per unit area per unit time at a given wind speed 11,50,52,54,55 .…”

Section: Methodsmentioning

confidence: 99%

Ecological and economic benefits of planting winter rapeseed (Brassica rapa L.) in the wind erosion area of northern China

Wang

et al. 2019

Sci Rep

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Winter and early spring wind soil erosion have considerable impacts on ecosystems, human well-being and agricultural production in the low precipitation zones of northern China. Little is known about the impact of growing winter rapeseed on ecological cropping systems and the associated economic benefits in the wind erosion area. To explore the winter rapeseed cover effect, we conducted a field experiment in which we covered the soil with winter rapeseed, winter wheat and wheat stubble at different plant density levels and used the spring bare ground as the control (CK). The effects of wind erosion, the “winter rapeseed + ” multiple cropping system, and the economic benefits were compared. There was a large difference in the dry matter, the maximum water absorption, the maximum water storage, the soil evaporation and total wind erosion, the amount of sediment transported in the stratum and the wind erosion modulus. Among them, the mean wind erosion modulus of spring sowing bare land was as high as 490.9 kg·hm−2·h−1, which was 7 and 13 times that of winter wheat and winter rapeseed, respectively. As the wind speed increased from 14 to 22 m·s−1, from a small density to a large density, the mean wind erosion modulus decreased from 68 to 17 kg·hm−2·h−1 for winter rapeseed, and 150 to 31 kg·hm−2·h−1 for winter wheat. Total wind-erosion of sediment transport of CK was 18.6 g·m−2 min−1, which was 16 and 31 times the mean value of winter wheat and winter rapeseed, respectively. “Winter rapeseed + ” replanting peanuts, potatoes, rice, seed melons and other crops generally increased the production value by 5–74% compared with wheat and corn intercropping, which was 98–255% higher than the traditional wheat single crop. Our results suggested that the suitable area for planting winter rapeseed in northern China was approximately 3.3 × 106 hm2, and in terms of the best economic and ecological effects, the appropriate density was 5 × 105 plants·hm−2 in northern China. Our results indicated that Chinese winter rapeseed was the best choice for preventing wind erosion and improving ecological and economic benefits in winter and spring in northern China; additionally, winter rapeseed has important impacts on agricultural sustainability in semi-arid and arid climates.

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“…This indicated that wind deposition was helpful to increase the yield of grassland in Qinghai Tibet Plateau, which may be related to the growth of plants on the plateau. Vegetation plays an important role in desertification control and soil and water conservation in the Yangtze source area [24,26].…”

Section: Analysis Of Relationship Between Wind Deposition and Vegetationmentioning

confidence: 99%

“…The climate shows a warm and dry trend while the permafrost table has a decreasing trend. Thus the original ecological environment is disturbed and further promotes the development of desertification [21][22][23][24][25]. Previous studies have shown that the source region of the Yangtze will increase significantly in the next 100 years.…”

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confidence: 99%

Has Wind Erosion in the Source Region of the Yangtze River Been Strengthened?

Song¹,

Tian²,

Li³

2020

Pol. J. Environ. Stud.

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As a result of climate change and increasing human activities, there are a series of ecological and environmental problems occurring, such as glacier retreat, grassland degradation, land desertification, hydrological system change, biodiversity reduction and so on [1-3]. And desertification is one of the most important environmental problems for the source region of Yangtze River [4-9]. The desertification of the source region of the Yangtze is mainly manifested as salinization, secondary bare soil, soil and water loss and desertification. Desertification for the source region of the Yangtze not only affects the ecological security of the source area, but also affects the sustainable development of the whole basin [10-13]. The water conservation function of regional characteristics, rich

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Effects of ridge height and spacing on the near-surface airflow field and on wind erosion of a sandy soil: Results of a wind tunnel study

Cited by 16 publications

References 22 publications

Effects of Row Spaces on Windproof Effectiveness of Simulated Shrubs With Different Form Configurations

Effects of Row Spaces on Windproof Effectiveness of Simulated Shrubs With Different Form Configurations

Ecological and economic benefits of planting winter rapeseed (Brassica rapa L.) in the wind erosion area of northern China

Has Wind Erosion in the Source Region of the Yangtze River Been Strengthened?

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