气候变化领域集成服务门户(CCPortal): Impact of rainfall structure and climate change on soil and groundwater salinization

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DOI	10.1007/s10584-020-02789-0
	Impact of rainfall structure and climate change on soil and groundwater salinization
	Slama F.; Gargouri-Ellouze E.; Bouhlila R.
发表日期	2020
ISSN	0165-0009
英文摘要	Irrigated areas, mainly in arid regions, are threatened by salinization processes. Climate change inducing temperature rise and rainfall depletion are expected to enhance these processes. Numerical models are often used to predict salinization in the root zone as well as water and solute fluxes reaching groundwater. Climatic data, mainly rainfall, have an important influence on the estimation of those fluxes. The present paper studies the impact of rainfall structure and climate change on soil and groundwater salinization. Soil samples were collected in three drip-irrigated plots in Korba semi-arid coastal plain in Tunisia during dry and wet seasons. Collected field data (water contents and soil salinities) are used to define the initial solute and flow conditions and to estimate the soil hydraulic parameters for numerical modeling. Daily rainfall structure and annual rainfall transition under both Markov Chain and climate change (RCP4.5 and RCP8.5) are assessed. Different climatic scenarios are then introduced as boundary conditions in HYDRUS-1D, to test the influence of rainfall on the salinity evolution in the soil profile and groundwater. Results show that both annual rainfall amounts and daily structure have an impact on soil concentrations and solute fluxes quantities reaching groundwater. The influence of rainfall paths is more important for larger unsaturated zone thickness when considering the dry and median rainfall conditions. Climate change scenarios show significant accumulation of salts in the root zone implying the imperative use of adequate irrigation practices. © 2020, Springer Nature B.V.
英文关键词	Climate change; HYDRUS-1D; Irrigation return flow; Markov chain; Salinization; Standardized precipitation index
语种	英语
scopus关键词	Groundwater; Markov chains; Numerical models; Rain; Soil surveys; Soils; Climate change scenarios; Dry and wet seasons; Groundwater salinizations; Irrigation practices; Rainfall structures; Salinization process; Soil concentrations; Soil hydraulic parameters; Climate change
来源期刊	Climatic Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147318
作者单位	LR99ES19 Laboratory of Modelling in Hydraulics and Environment (LMHE), National Engineering School of TUNIS (ENIT), University of Tunis El Manar, BP 37, Tunis, 1002, Tunisia
推荐引用方式 GB/T 7714	Slama F.,Gargouri-Ellouze E.,Bouhlila R.. Impact of rainfall structure and climate change on soil and groundwater salinization[J],2020.
APA	Slama F.,Gargouri-Ellouze E.,&Bouhlila R..(2020).Impact of rainfall structure and climate change on soil and groundwater salinization.Climatic Change.
MLA	Slama F.,et al."Impact of rainfall structure and climate change on soil and groundwater salinization".Climatic Change (2020).