Spatiotemporal variations and driving factors of the potential wind erosion rate in the Hexi region, PR China

2020 ◽  
Vol 32 (1) ◽  
pp. 139-157 ◽  
Author(s):  
Jinkuo Lin ◽  
Qingyu Guan ◽  
Ninghui Pan ◽  
Rui Zhao ◽  
Liqin Yang ◽  
...  
Keyword(s):  
Erosion Rate ◽  
Wind Erosion ◽  
Driving Factors ◽  
Spatiotemporal Variations ◽  
Pr China ◽  
Hexi Region

Spatiotemporal variations of water productivity for cropland and driving factors over China during 2001–2015

2021 ◽  
pp. 107328
Author(s):  
Shanshan Yang ◽  
Jiahua Zhang ◽  
Jingwen Wang ◽  
Sha Zhang ◽  
Yun Bai ◽  
...  
Keyword(s):  
Water Productivity ◽  
Driving Factors ◽  
Spatiotemporal Variations

scholarly journals Spatiotemporal Variations and Driving Factors of Air Pollution in China

2017 ◽  
Vol 14 (12) ◽  
pp. 1538 ◽  
Author(s):  
Dongsheng Zhan ◽  
Mei-Po Kwan ◽  
Wenzhong Zhang ◽  
Shaojian Wang ◽  
Jianhui Yu
Keyword(s):  
Air Pollution ◽  
Driving Factors ◽  
Spatiotemporal Variations

scholarly journals Numerical Investigation of Wind Erosion to the Grooved Concrete Wall Surface under a Wind-Blown Sand Movement

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Shanqun Chen ◽  
Runchao Tang ◽  
Longzhu Zhang ◽  
Bin Liao
Keyword(s):  
Erosion Rate ◽  
Wind Erosion ◽  
Damage Mechanism ◽  
Impact Angle ◽  
Wall Surface ◽  
Smooth Wall ◽  
Concrete Wall ◽  
Rate Distribution ◽  
Erosion Rates ◽  
Sand Movement

Wind erosion to the grooved concrete wall surface under a wind-blown sand movement was numerically studied. Particularly, the influencing factors that affect the wind erosion to the grooved concrete wall surface were systematically investigated by using the RNG k − ε turbulence model combined with the discrete phase model (DPM). It was found that, under a relatively low impact angle, the damage mechanism to the grooved wall surface is wind-blown sand impact, and the erosion rates of the grooved wall surfaces are higher than those of the smooth wall surfaces. By contrast, under a relatively high impact angle, the damage mechanism to the grooved wall surface transfers to the microcutting effect, and the erosion rates show an opposite trend. The optimization rates between the erosion of grooved and smooth wall surfaces increase with increasing groove size or groove number. However, the damage mechanism to the grooved wall surface is hardly changed by expanding the groove area. The erosion rate distribution and the optimization rates of the groove wall surfaces are not significantly changed by adjusting the spacing between the grooves alone. When the groove shape changes from semicircular to rectangular, the erosion rate distribution is significantly changed, and the wear resistance of the changed grooved wall surface gets better.

scholarly journals Spatial Heterogeneity of Driving Factors of Wind Erosion Prevention Services in Northern China by Large-Scale Human Land-Use Management

Land ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 111
Author(s):  
Jinfeng Ma ◽  
Ruonan Li ◽  
Yanzheng Yang ◽  
Yue Hai ◽  
Tian Han ◽  
...  
Keyword(s):  
Land Use ◽  
Wind Erosion ◽  
Large Scale ◽  
Northern China ◽  
Driving Factors ◽  
Driving Mechanism ◽  
Land Use Management ◽  
Human Land Use ◽  
Western Division ◽  
Erosion Prevention

Large-scale human land-use management is an effective method for ecosystem restoration and wind erosion prevention service (WEPS) improvement. However, the spatial differences of driving factors and the feedback in subsequent management have received less attention. This study analysed the temporal and spatial changes in the WEPS in northern China from 2000 to 2015, classified the driving modes between the WEPS and environmental factors, distinguished the main driving factors, and proposed suggestions for successive projects. The results showed that, compared with 2000, the amount of WEPSs in 2015 increased by 12.60%, and forest and grassland in the WEPS-increased area was 1.34 times that in the declining area. There were east–west differences in the driving mechanism of WEPS improvement. In addition to climatic and topographic factors, the western division was mainly affected by changes in vegetation quality, whereas the eastern division was affected by the combined influence of vegetation quality and quantity. This study shows the necessity of land-use management and project zoning policies, and provides a reference for policy formulation and management of large-scale ecological projects.

scholarly journals Measurements and modelling of wind erosion rate in different tillage practices using a portable wind erosion tunnel

2016 ◽  
Vol 103 (3) ◽  
pp. 327-334
Author(s):  
Kazım Çarman ◽  
Tamer Marakoğlu ◽  
Alper Taner ◽  
Fariz Mikailsoy
Keyword(s):  
Erosion Rate ◽  
Wind Erosion ◽  
Tillage Practices

scholarly journals Solidifying dust suppressant based on modified chitosan and experimental study on its dust suppression performance

2017 ◽  
Vol 36 (1-2) ◽  
pp. 640-654 ◽  
Author(s):  
Yanghao Liu ◽  
Wen Nie ◽  
Hu Jin ◽  
He Ma ◽  
Yun Hua ◽  
...  
Keyword(s):  
Erosion Rate ◽  
Wind Erosion ◽  
Material Handling ◽  
Erosion Resistance ◽  
Raw Material ◽  
Wind Disturbance ◽  
Wind Speeds ◽  
Modified Chitosan ◽  
Coal Particles ◽  
Before And After

In view of the fugitive dusts caused by wind disturbance and material handling in coal bunkers, surface plants, and open-air coal stocking yards of coal businesses, the solidifying dust suppressant based on modified chitosan is synthesized and prepared through the chemical modification of –NH2 with chitosan as a raw material and –NH2 was replaced by –CH2CH(OH)CH2N+(CH3)CI− through the technique of Fourier transform infrared spectroscopy. According to viscosity experiment results, the viscosity of the modified solidifying dust suppressant increased significantly. The coal particles suppressed by the dust suppressant as observed with a 50,000X scanning electron microscope were coagulated together, which indicated very good cohesion effect. In addition, wind erosion resistance experiment was conducted to analyze the wind erosion rate of coal powders before and after sprayed with the suppressant at different wind speeds, which indicated that the dust suppressant can effectively prevent fugitive dusts at a wind speed of 17 m/s.

scholarly journals High Temperature Coatings for Protection Against Turbine Deterioration

1993 ◽  
Author(s):  
W. Tabakoff ◽  
M. Metwally ◽  
A. Hamed
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
High Temperatures ◽  
Erosion Rate ◽  
Wind Erosion ◽  
Protective Coatings ◽  
Impact Angle ◽  
Steam Turbines ◽  
Erosion Behavior ◽  
The Impact

In this research, an investigation was conducted to study the fly ash particles associated with the erosion behavior of alloys and coatings which are widely used in gas and steam turbines. The erosion behavior of many alloys and protective coatings has been investigated experimentally at high temperatures using a specially designed wind erosion tunnel. The erosion results show the effect of velocity, temperature and the impact angle on the erosion rate.

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