干旱区生态环境知识资源中心(Arid): Impact of subsurface drainage system on waterlogged and saline soils in a Saharan palm grove

Arid

DOI	10.1016/j.catena.2022.106070
	Impact of subsurface drainage system on waterlogged and saline soils in a Saharan palm grove
	Askri, Brahim; Khodmi, Sonia; Bouhlila, Rachida
通讯作者	Askri, B
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	212
英文摘要	Salinity and waterlogging associated with saline and shallow groundwater are major problems for the sustainability of irrigated agriculture in many Saharan oases located in southern Tunisia. The aim of this paper is to assess the performance of a subsurface drainage system installed in the modern Sagdoud oasis to control the perched water table depth and reclaim the saline waterlogged soils. Water and salt balances at the oasis scale and daily basis were evaluated during the hydrologic year 1995. Moreover, the water table depth, the mineralisation in the perched groundwater and the bare soil salinity were measured at 40 parcels of farmland in November 1993, October 1998 and June 2021. The results showed that the total depth of irrigation water was three times the potential evapotranspiration depth in 1995. Evaporation process and subsurface drainage system allowed the discharge of 81% and 42%, respectively, of the total volume of irrigation water. From a salt input of 4,865 tons/ year by irrigation, 4,566 tons/year (94%) were exported by subsurface drainage system and about 300 tons/year were estimated to have been stored in the soil and perched groundwater. The spatial distributions of the perched groundwater depth and mineralisation, and bare soil salinity were influenced mainly by the topography. The mean water table depth increased by 87%, while the mean salinity of perched groundwater increased by 19% during November 1993-October 1998. The mean bare soil salinity in the 20-40, 40-60 and 80-100 cm depths decreased by 75%, 50% and 42%, respectively, during October 1998-June 2021. Overall, the study revealed that the subsurface drainage system allowed the control of the water and salt balances at the oasis scale, the decrease in the perched water table levels and the reclamation of saline soils. However, the provision of this system does not permit the control of the groundwater mineralisation.
英文关键词	Oasis Soil Salinity Waterlogging Drainage Tunisia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000821283400003
WOS关键词	WATER-TABLE DEPTH ; SHALLOW AQUIFERS ; SALINIZATION ; IRRIGATION ; YIELD ; EVAPORATION ; PERFORMANCE ; TUNISIA ; REGION ; MODEL
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392084
推荐引用方式 GB/T 7714	Askri, Brahim,Khodmi, Sonia,Bouhlila, Rachida. Impact of subsurface drainage system on waterlogged and saline soils in a Saharan palm grove[J],2022,212.
APA	Askri, Brahim,Khodmi, Sonia,&Bouhlila, Rachida.(2022).Impact of subsurface drainage system on waterlogged and saline soils in a Saharan palm grove.CATENA,212.
MLA	Askri, Brahim,et al."Impact of subsurface drainage system on waterlogged and saline soils in a Saharan palm grove".CATENA 212(2022).