Abstract
In arid and semi-arid regions, salinity is a serious and chronic problem for agriculture. The aim of this study is to evaluate the hydromorphical and salinity risks, and to evaluate the relationship and the possible interfering between the water table and the soil on the oasis of Gabes. The topic is very important, especially for nations around the oceans in arid and semi-arid regions. The effect of the gypsum alkalinity in the soil salinity has investigated. The chemical characteristic of used water irrigation (salinity saturation) and their impact factor in the productivity area. Moreover, in this study the program of examination need to put fifteen piesometres by CRAD (Regional Commissariat of Agriculture Development) in the city of Gabes to controlling the variation of water levels in the superficial water table and their change chemical quality. The experimental measure of this program needs a yearly observation and investigation during April and May to evaluate the hydromorphical and salinity risks on the oasis of Gabes. The relationship and the possible interfering between the water table and the soil has evaluate in such condition.
Highlights
The sustainability of irrigated agriculture in many arid or semiarid areas is threatened by a combination of factors including poor quality irrigation water, poor or no drainage [1]
The aim of this study is to evaluate the hydromorphical and salinity risks, and to evaluate the relationship and the possible interfering between the water table and the soil on the oasis of Gabes
The objective of this study was to verify if EC measurements can characterize the spatial structure of laboratory-measured soil EC, in order to use it in mapping of soil salinity
Summary
The sustainability of irrigated agriculture in many arid or semiarid areas is threatened by a combination of factors including poor quality irrigation water, poor or no drainage [1]. The irrigation water exploited in Gabes oasis since 1958, resulting from drilling kept globally the same sulphate mixed chemical water and facies. This water is classified as having high risk of salinization and a middle risk of alcalinisation. Irrigation used drilling water characterized by a mixed sulphate facies, which is probably responsible for gypsum accumulation in all oasis soils. The aims of this study are to assess the hydromorphical and salinity risks and to evaluate the relationship and the possible interfering between the water table and soil on the oasis of Gabes. The topic is very important, especially for nations around the oceans in arid and semi-arid regions
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