干旱区生态环境知识资源中心(Arid): Experimental and numerical modelling of constructed channels in the desert sand dunes for MAR applications

Arid

DOI	10.5004/dwt.2023.28229
	Experimental and numerical modelling of constructed channels in the desert sand dunes for MAR applications
	Al-Shukaili, A.; Kacimov, A. R.
通讯作者	Al-Shukaili, A
来源期刊	DESALINATION AND WATER TREATMENT
ISSN	1944-3994
EISSN	1944-3986
出版年	2023
卷号	285 页码:78-82
英文摘要	Hydrology of sand dunes in the deserts of arid regions, specifically, groundwater in aquifers underlying the sand fields (e.g., Wahiba Sands in Oman) has been studied since 1970th. Sustainable water resources management in the desert dunes is essential, particularly in Gulf countries, where no perennial streams exist. Interdunal areas can be explored and tested for managed aquifer recharge ( MAR) if natural wadis or small- size constructed channels are used as surface water spreading systems. These channels would both transport and seep tertiary treated wastewater into the vadose zone and enhance the amount of moisture content there. In this paper, a coupled surface-subsurface flow was experimentally and numerically studied in application to MAR through small-size triangular channels. In the field, experiments were done at the crest and slope of a selected dune, a triangular channel had a sand bed and a mild slope (S = 5 degrees). By applying a constant discharge at the inlet of the channel, the length, L, of the water jets propagating until their complete seepage extinction has been measured. Numerically, by HYDRUS2D, we simulated saturated-unsaturated transient infiltration by considering a cross-section of triangular channels of different bank slopes. to find the maximum total volume of infiltrated water from the channel. The boundary condition was a hydrostatic pressure head along the wetted perimeters of the channels with water depth gradually dropping downslope. The Morel-Seytoux shape factor mu = q(i) X (K(s)A(0)(1/2)) where q(i) is the rate of infiltration as a function of lambda is plotted. If q(i) X << Q, where X is a characteristic size in the direction of surface flow in the channel, Q is the surface flow rate, that is, for large channels and fast conveyance of surface water, q(i) can be assumed independent of X. Then there is a unique minimum of mu(lambda) at a given A(0). If q(i) is not small, we determine the trench shape of a given A(0), which maximizes the total volume of water infiltrated from the trench. The results in this paper can be used in studies of furrow irrigation in desert agriculture and for evaluation of transmission losses from wadi channels flowing after flash floods.
英文关键词	Sand dunes Managed aquifer recharge Surface-subsurface flow Finite elements
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000983295900007
WOS关键词	SOLUTE TRANSPORT ; WATER-FLOW ; SIMULATION ; RECHARGE ; AQUIFER
WOS类目	Engineering, Chemical ; Water Resources
WOS研究方向	Engineering ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395843
推荐引用方式 GB/T 7714	Al-Shukaili, A.,Kacimov, A. R.. Experimental and numerical modelling of constructed channels in the desert sand dunes for MAR applications[J],2023,285:78-82.
APA	Al-Shukaili, A.,&Kacimov, A. R..(2023).Experimental and numerical modelling of constructed channels in the desert sand dunes for MAR applications.DESALINATION AND WATER TREATMENT,285,78-82.
MLA	Al-Shukaili, A.,et al."Experimental and numerical modelling of constructed channels in the desert sand dunes for MAR applications".DESALINATION AND WATER TREATMENT 285(2023):78-82.