Spatial heterogeneity of wind-eroded soil particles around <i>Nitraria tangutorum</i> nebkhas in the Ulan Buh Desert

Dang, Xiaohong; Pan, Xia; Gao, Yong; Yang, Lei; Wang, Zhenyi; Meng, Zhongju

doi:10.1080/11956860.2019.1646064

Cited by 7 publications

(6 citation statements)

References 52 publications

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“…The effect of wind environment and vegetation coverage on the surface sediments. The spatial difference of surface sediments in sand area depends on the regional difference of wind environment and vegetation coverage 25 . The annual average wind velocity was respectively fitted linearly with the Sorting Coefficient and Table 1.…”

Section: Results and Analysismentioning

confidence: 99%

“…One key parameter affecting wind erosion rate is sediment particle size 22 . The composition of particles in different diameter grades of surface sediments is the key factor affecting surface wind erosion activity, and it plays an important role in the underlying surface factors of surface wind erosion process and is also an indicator of the occurrence and development of land desertification [23][24][25][26][27] . The spatial difference of sediment particle size parameters directly reflects the transport and accumulation process experienced by sediments, and even has a certain indication significance for the source of sand dunes 28 .…”

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confidence: 99%

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Effects of Compound Sand Barrier for Habitat Restoration on Sediment Grain-size Distribution in Ulan Buh Desert

Pan

Wang

Gao

2020

Sci Rep

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Wind erosion is a huge challenge for ecologists to stabilize sand dunes and to change them into stable productive ecosystems. In order to better understand its role in the process of ecological restoration, the sediment grain-size characteristics of compound sand barrier were evaluated through field experimental observation. The results indicated that the compound sand barrier was mainly composed of extremely fine sand and fine sand, and the fine sand and extremely fine sand in the inner side were higher than the east and west sides of the compound sand barrier. Due to the blocking effect of compound sand barrier, the Sorting Coefficient became better, the Skewness belonged to the positive deviation and the Kurtosis presented leptokurtosis distribution. Moreover, while the cumulative frequency distribution curve in the inner side became steeper, the slope increased and reached the top of the curve ahead of time. The effect of wind environment and vegetation coverage on the surface sediments showed that the average annual wind velocity and vegetation coverage was negatively correlated with the average grain-size, but positively correlated with the Sorting Coefficient. There was a significant correlation among the annual wind speed, vegetation coverage, average grain-size and Sorting Coefficient, which indicated that vegetation coverage and wind environment was the key factor leading to the difference of surface sediments in this area. Collectively, the establishment of compound sand barrier is one of the most effective methods of sand-fixing with engineering measure in the arid desert regions. Therefore, given the complexities of agricultural systems, stubble retention and black film covered during harvesting and incorporation of the stubble into soil in the next spring appears to be the best choice in the dry northern China where farmlands suffer serious wind erosion. China is one of the countries most affected by desertification. Since the early 1950s, more than 70 serious sandstorms have occurred, which have caused huge losses to human life and property, and seriously threatened the living environment of the local people. Sandy desert land cover a 1.49 million km 2 of China, 15.5% of the total area 1,2. Due to sand transport and dune burial on arid desert regions, pipeline corridors, power transmission lines, transportation routes and people exploitation have been damaged. So far, wind erosion is still one of the most serious problems in many agricultural lands 3,4 and it is currently recognized as a major source of environment degradation 5. Consequently, a series of ecological engineering constructions and projects to stabilize sand dunes along highways or railways in desert regions were begun in the 1950s 6,7. The establishment of sand barriers on deserted land has been one of the most popular restoration techniques. It has been widely used in habitat recovery and protection before and after the construction, such as pipeline corridors, transmission lines and transport routes in arid desert areas, as well as...

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Section: Results and Analysismentioning

confidence: 99%

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confidence: 99%

Effects of Compound Sand Barrier for Habitat Restoration on Sediment Grain-size Distribution in Ulan Buh Desert

Pan

Wang

Gao

2020

Sci Rep

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“…The depressed topography and the emergence of vegetation in the mouth of the troughs cause the highest reduction of wind speed in this zone (SP18 and SP19). The wind speed is reduced locally by the presence of vegetation (Arens, 1996; Davidson‐Arnott et al, 2012; Hesp et al, 2005; Leenders et al, 2007; Mayaud et al, 2016) that can also act as a sediment trap (Al‐Awadhi & Al‐Dousari, 2013; Dupont et al, 2014; Xiaohong et al, 2019), maintaining the thickness of the sand sheet. The highest wind speeds in Run 2 were recorded at SP16, located in an elevated rocky outcrop close to the northern scarp, whose topography is likely to be responsible for flow acceleration at this point.…”

Section: Resultsmentioning

confidence: 99%

“…that can also act as a sediment trap(Al-Awadhi & Al- Dousari, 2013;Dupont et al, 2014;Xiaohong et al, 2019), maintaining the thickness of the sand sheet. The highest wind speeds in Run 2 were recorded at SP16, located in an elevated rocky outcrop close to the northern scarp, whose topography is likely to be responsible for flow acceleration at this point.Wind speeds at the sample points recorded in Run 3 varied between 25% and 90% of the input wind speed.…”

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confidence: 99%

Foredune responses to the impact of aggregate extraction in an arid aeolian sedimentary system

Sanromualdo-Collado

Marrero-Rodríguez

García‐Romero

et al. 2022

Earth Surf Processes Landf

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Coastal dunes have long suffered the effects of human interventions that have altered the landscape and operation of these ecosystems. Aggregate extractions have been shown to modify the biogeomorphological processes in aeolian sedimentary systems. The impacts associated to aggregate extraction include the reduction of available sediment and changes to the topography and vegetation patterns, thereby altering the sedimentary dynamics and limiting the recovery capacity of the dunefield. The aim of this article is to analyse the environmental effects produced by historical aggregate extraction in the foredune area of an arid aeolian sedimentary system (El Médano, Tenerife, Spain) through a study of the airflow dynamics and spatial distribution of vegetation, sediment and topographic changes. The methodology was designed with two temporal scales: (i) a long‐term approach which compares historical sources and current ones; (ii) a short‐term approach through experimental data collection to characterize the present functioning. For the latter, a field study was carried out in June 2021, collecting wind speed and direction data at a height of 0.50 m, sediment data (sand sheet thickness, grain size and sorting), and vegetation data (cover and species richness) at 40 sample points. The main results show that when the anthropic stress ceased the foredune did not follow a natural environmental pattern, and that the way it functions at the present time is determined by the changes induced by the aggregate extraction. Changes include alterations to the topography, the creation of a lagoon, and the generation of an aeolian deflation area and flow acceleration zones with the associated sand transport. This research contributes to an understanding of the environmental consequences of aggregate extractions on the foredunes of arid aeolian sedimentary systems and can enable the relevant authorities to make better‐informed decisions that help the management of these ecosystems.

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“…Wind erosion is the most natural phenomenon of land degradation and desertification in arid and semi-arid areas, especially in the vast desert and peripheral areas, with distinctive characteristics of severe damage and difficult measurement (Merrill et al, 1999). Specifically, it refers to the comprehensive natural geographical process in which near-surface soil particles are abraded, eroded, and transferred by airflow or gas-solid two-phase flow (Dang et al, 2019). This process is primarily subject to regional climate conditions.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Variation Characteristics of Wind Erosion Climate Erosivity in the Arid Desert Region of Northwestern China

Wenzhang,

Jin,

Sirui

et al. 2023

Journal of Resources and Ecology

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Soil wind erosion is an important factor that inhibits social activities and economic development in the arid desert region of northwestern China. In order to reveal the distribution of soil wind erosion climate erosivity in the arid desert region of northwestern China, the spatial and temporal variation and transfer characteristics of wind erosion climate erosivity in the region were evaluated by referring to China's regional ground long-time series meteorological element driving data, and applying the ArcGIS software analysis. The study results show that: (1) Against a backdrop that such meteorological factors as precipitation amount, wind speed, and average temperature over multiple years all increase progressively decade by decade, the wind erosion climate erosivity in the northwest arid desert region is decreasing as a whole. The C values of most areas are within the range of 0 to 100. However, the climate erosivity in the hinterland and a few areas is increasing, with C values higher than 150. (2) The monthly variation of the C value varies significantly. The greatest variation occurs in spring and summer, followed by the variation in winter, while the slightest variation occurs in autumn. Through the abrupt change test, it is found that the wind erosion climate erosivity in spring has the strongest variation, with four abrupt change points and a pattern of long-term fluctuating decline. (3) The soil wind erosion in the region gradually decreases from the hinterland to the peripheral areas, with the areas highly affected by erosion increasing yearly. (4) The spatial-temporal transfer and variation of wind erosion climate erosivity present an overall pattern of slight decrease. However, in some areas, they increase or show an apparent trend of increase. The study results have provided relevant theoretical evidence and scientific support for preventing and controlling wind-sand disasters in the arid desert region of northwestern China.

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Spatial heterogeneity of wind-eroded soil particles around Nitraria tangutorum nebkhas in the Ulan Buh Desert

Cited by 7 publications

References 52 publications

Effects of Compound Sand Barrier for Habitat Restoration on Sediment Grain-size Distribution in Ulan Buh Desert

Effects of Compound Sand Barrier for Habitat Restoration on Sediment Grain-size Distribution in Ulan Buh Desert

Foredune responses to the impact of aggregate extraction in an arid aeolian sedimentary system

Spatial and Temporal Variation Characteristics of Wind Erosion Climate Erosivity in the Arid Desert Region of Northwestern China

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