Modeling the aeolian sand transport for the desert of Kuwait: Constraints by field observations

Al-Awadhi, Jasem M.; Alawadhi, Abdullah

doi:10.1016/j.jaridenv.2009.04.023

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…Several authors [13, 81, 91–93, 97–100] have proved that the potential of halophytic plants to accumulate enormous salt quantities depends often on the capacity of their above ground biomass (hyperaccumulating plants). This ability could be of great importance, particularly in arid and semiarid regions, where insufficient precipitations and inappropriate systems [101] are unable to reduce the salt burden in the rhizosphere of plants [102] and suitable physicochemical methods are too expensive. Environmentally safe and clean technique to address the salinity problem includes the introduction of salt (ion) removing species to control salinity and to maintain the sustainability of agricultural fields.…”

Section: Phytoremediationmentioning

confidence: 99%

Potential Use of Halophytes to Remediate Saline Soils

Hasanuzzaman

Nahar

Alam

et al. 2014

BioMed Research International

327

174

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Salinity is one of the rising problems causing tremendous yield losses in many regions of the world especially in arid and semiarid regions. To maximize crop productivity, these areas should be brought under utilization where there are options for removing salinity or using the salt-tolerant crops. Use of salt-tolerant crops does not remove the salt and hence halophytes that have capacity to accumulate and exclude the salt can be an effective way. Methods for salt removal include agronomic practices or phytoremediation. The first is cost- and labor-intensive and needs some developmental strategies for implication; on the contrary, the phytoremediation by halophyte is more suitable as it can be executed very easily without those problems. Several halophyte species including grasses, shrubs, and trees can remove the salt from different kinds of salt-affected problematic soils through salt excluding, excreting, or accumulating by their morphological, anatomical, physiological adaptation in their organelle level and cellular level. Exploiting halophytes for reducing salinity can be good sources for meeting the basic needs of people in salt-affected areas as well. This review focuses on the special adaptive features of halophytic plants under saline condition and the possible ways to utilize these plants to remediate salinity.

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Section: Phytoremediationmentioning

confidence: 99%

Potential Use of Halophytes to Remediate Saline Soils

Hasanuzzaman

Nahar

Alam

et al. 2014

BioMed Research International

327

174

View full text Add to dashboard Cite

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“…The annual total sand drift measured in Kuwait is 7.8 X 10 4 kg.m −1 -width . Al-Awadhi and Al-Awadhi (2009) developed a sand transport model, which computed the summer monthly sand transport rate 5,900 kg.m −1 towards southeast. The highest sand transport rate occurs within the Al Huwaimiliya sand dune corridor, which crosses the country from NW to SE (Fig.…”

Section: Aeolian Sand Movementmentioning

confidence: 99%

Geo- and Environmental Hazard Studies in Kuwait

Al-Awadhi

el-aal

Misak

et al. 2022

The Geology of Kuwait

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Low magnitude Earthquakes are the most natural hazard facing Kuwait, while other environmental challenges such as flooding, dust fallout, land degradation, and aeolian sand movement often arise from human impact as well as natural factors. Because of the rapid socio-economic development in the last five decades in Kuwait, these issues cause environmental and social problems as well as economic disturbance; they are also considered natural disasters for country. The scale and intensity of the geological environment hazards are considerably increasing especially land degradation, and impacting on the harsh structure of desert ecosystem. Due to fragility of the desert environment, human activities exceeding the carrying capability of the geo-environment system can easily lead to geological and environmental hazards; such as runoff, sand and dunes movements and dust fallout causing serial environmental and health impacts. Geographic Information System (GIS) has been used to evaluate the degrees of geological hazard and risk by producing maps for each hazard; seismic, sand potentiality, hydrologic risk, land degradation, and sand drift severity maps are produced.

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“…Althoughmany scholars have used more convenient methods and means to carry out researches on migration and deposition of sand dunes, such as wind tunnel experiments [17][18][19][20] , remote sensing survey [21][22][23] and so on, it is still difficult to continuously show the variation of wind field and sand flux at different positions and heights of sand dunes of different scale, and it is also difficult to give the detailed structure of wind flow field and the distribution of shear stress in continuous space. To compensate for this defect, many scholars began to use numerical simulation to analyze the changes of wind flow field in sand dunes 13,[24][25][26][27][28] . Most of the previous numerical methods are used to simulate smaller dunes, because the simulation of small dunes take a short time, which mainly to solve the problem that the turbulence behind the leeward side is not separated, and then to obtain the disturbance characteristics of shear stress and wind field.…”

Section: Numerical Simulation Of Wind Field and Sand Flux In Crescentmentioning

confidence: 99%

Numerical simulation of wind field and sand flux in crescentic sand dunes

Zhang

et al. 2021

Sci Rep

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Sand flux is the key factor to determine the migration of sand dunes and the erosion to the surrounding environment. There are crescent-shaped sand dunes of various scales in the desert, and there are significant differences in spatial wind field and sand flux among them. However, due to the difficulty of monitoring, it is difficult to continuously observe the spatial wind field and sand flux around the larger crescentic dunes. On the basis of the Reynolds-Average Navier–Stokes (RA-NS) equation and the stress and sand flux model, the distribution of wind field and sand flux of a circular dune with a height of 4.2 m and a length of about 100 m during the four evolutionary periods of the evolution into a crescentic dune was simulated in this study. By comparing with the measured results, we verified that the closer to the leeward side, the more the simulated values of the velocity in wind field and sand flux were in line with the measured results. In order to further analyze the influence of the height of dune and other relevant parameters on sand flux, we simulated the influence on wind field and sand flux by changing the air viscosity and wind velocity of upper boundary. We found that the air viscosity mainly affected the amount of deposited sand on the leeward side of sand dune, while the increase of wind velocity would undoubtedly increase the sand flux of the whole sand dune. In addition, the simulation results also showed that the influence of changes in height of dune on the turbulent intensity of leeward side was very significant, and the turbulent intensity increased with the height of dune. The height changes of tall dunes gradually affected the transport of sand caused by wind flow behind the leeward side because that the rotation of the wind flow would form new vortexes at the large pores behind the leeward side, which would increase the turbulent energy in space and thus would increase the distance of migration of the lifting sand. While the low sand dunes could not form extra small vortexes at the bottom of the leeward side, so the wind velocity was small and the eddy currents behind the leeward side were more stable. The simulation results indicated that wind velocity was not the only reason for increasing the amount of sand flux, and the fluctuation of wind flow caused by turbulence could also stimulate the movement of sand particles on the ground.

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Modeling the aeolian sand transport for the desert of Kuwait: Constraints by field observations

Cited by 12 publications

References 24 publications

Potential Use of Halophytes to Remediate Saline Soils

Potential Use of Halophytes to Remediate Saline Soils

Geo- and Environmental Hazard Studies in Kuwait

Numerical simulation of wind field and sand flux in crescentic sand dunes

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