干旱区生态环境知识资源中心(Arid): Characterization and modeling of an alluvial aquifer in a semi-arid mountainous area (case of the Er-Rich aquifer, High Atlas, Morocco)

Arid

DOI	10.1051/lhb/2019046
	Characterization and modeling of an alluvial aquifer in a semi-arid mountainous area (case of the Er-Rich aquifer, High Atlas, Morocco)
	El Kayssi, Youssef 1; Kacimi, Ilias 1; Hilali, Mohamed 2
通讯作者	El Kayssi, Youssef
来源期刊	HOUILLE BLANCHE-REVUE INTERNATIONALE DE L EAU
ISSN	0018-6368
EISSN	1958-5551
出版年	2019
期号	5-6 页码:26-34
英文摘要	Arid zone climatic conditions generate floods, often brief and intense, so the corresponding alluvial aquifers recharge and discharge rapidly because they consist of relatively thin, permeable deposits. However, the Er-Rich alluvial aquifer is characterized by relatively low piezometric fluctuations even in periods of prolonged drought. Understanding the hydrodynamics of this aquifer and the different components of the groundwater budget is the preliminary step to analyze this phenomenon. The geological data show a collapse-basin limited on both sides by long mountain ridges, on which alluvial and detrital sediments have been deposited. Then, based on 40 boreholes data, completely crossing the quaternary formation, the aquifer is unconfined, and consists of sand and gravel with some clay and silt. Locally, it's including deposits of Tertiary age. The aquifer materials are commonly segregated by size into lenses and beds, which can affect the movement and availability of water. Beds and lenses of sand, gravel, or mixtures of the two yield most of the water. The deposits may be more than 20 m thick and some km wide, much of their total thickness is saturated during the flood period, and, in many places, they yield large amounts of water. Thus a mathematical groundwater model was developed, employing conceptual groundwater modelling approach. The model covers an area of 110 km(2) with one layer, which is unconfined and contains 69 rows and 210 columns with a uniformly horizontal spacing equal to 200 m. For this purpose, Groundwater Modelling Software (GMS) was used which supports the MODFLOW-2000 code. The model is calibrated in steady and transient state considering the period from 1980 to 2008. The calibrated model shows increasing porosity (5 to 25%), from old terraces to the most recent alluvium, according to the degree of weathering and the percentage of clay. It shows also the importance of the river flows in the water balance of the aquifer; its contributions participate up 67% of the inputs to the Er-Rich aquifer. This equilibrium is the result of a global regulation at the watershed, by the presence of perennial sources (ex. : Sidi Hamza) upstream of the modeled domain, capturing the deep Liassic reservoir, and by the existence of a reduced outlet downstream of the aquifer.
英文关键词	alluvial aquifer modeling Er-Rich Morocco
类型	Article
语种	法语
国家	Morocco
收录类别	SCI-E
WOS记录号	WOS:000504089900003
WOS类目	Water Resources
WOS研究方向	Water Resources
EI主题词	2019-12-23
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311906
作者单位	1.Univ Mohammed 5, Fac Sci Rabat Agdal, Dept Sci Terre, LG2E, Ave Ibn Battouta BP 1014, Rabat, Morocco; 2.Fac Sci & Tech Errachidia, Equipe Rech Genie Mines Eau & Environm GMEE, Errachidia, Morocco
推荐引用方式 GB/T 7714	El Kayssi, Youssef,Kacimi, Ilias,Hilali, Mohamed. Characterization and modeling of an alluvial aquifer in a semi-arid mountainous area (case of the Er-Rich aquifer, High Atlas, Morocco)[J],2019(5-6):26-34.
APA	El Kayssi, Youssef,Kacimi, Ilias,&Hilali, Mohamed.(2019).Characterization and modeling of an alluvial aquifer in a semi-arid mountainous area (case of the Er-Rich aquifer, High Atlas, Morocco).HOUILLE BLANCHE-REVUE INTERNATIONALE DE L EAU(5-6),26-34.
MLA	El Kayssi, Youssef,et al."Characterization and modeling of an alluvial aquifer in a semi-arid mountainous area (case of the Er-Rich aquifer, High Atlas, Morocco)".HOUILLE BLANCHE-REVUE INTERNATIONALE DE L EAU .5-6(2019):26-34.