Modeling interactions between saturated and un-saturated zones by Hydrus-1D in semi-arid regions (plain of Kairouan, Central Tunisia)

Environmental Monitoring and Assessment
Mariem SaâdiSabri Kanzari

Abstract

In semi-arid areas like the Kairouan region, salinization has become an increasing concern because of the constant irrigation with saline water and over use of groundwater resources, soils, and aquifers. In this study, a methodology has been developed to evaluate groundwater contamination risk based on the unsaturated zone hydraulic properties. Two soil profiles with different ranges of salinity, one located in the north of the plain and another one in the south of plain (each 30 m deep) and both characterized by direct recharge of the aquifer, were chosen. Simulations were conducted with Hydrus-1D code using measured precipitation data for the period 1998-2003 and calculated evapotranspiration for both chosen profiles. Four combinations of initial conditions of water content and salt concentration were used for the simulation process in order to find the best match between simulated and measured values. The success of the calibration of Hydrus-1D allowed the investigation of some scenarios in order to assess the contamination risk under different natural conditions. The aquifer risk contamination is related to the natural conditions where it increased while facing climate change and temperature increase and decreased in the pr...Continue Reading

References

Mar 1, 1996·Annals of Human Genetics·C A Smith, D A Stephens
Jan 25, 2011·Journal de gynécologie, obstétrique et biologie de la reproduction·S SendonV Houfflin-Debarge

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Citations

May 19, 2019·Environmental Monitoring and Assessment·Ch Jyotiprava DashP P Adhikary

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