SALTFREE- Salinization in irrigated areas: risk evaluation and prevention

Partners: IDL-FCiências (Portugal); INRGREF (Tunisia); INIAV(Portugal); ISAFOM-CNR (Italy); PORT SAID UNIVERSITY (Egypt)

 

The partners have collected EM data and soil samples in order to characterize the different soil in terms of salinity and study its evolution. Some partners developed also
actions with farmers to explain the objectives of the project and show the use of some methods.

 

Experimental field and field with intermittent leaching (Egypt)

Experimental field and field with intermittent leaching (Egypt)

Experimental field (Tunisia)

Experimental field (Tunisia)

Experimental field in Tajo Lezirias (Portugal)

Experimental field in Tajo Lezirias (Portugal)

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Undisturbed soil sampling for hydraulic properties determination in the lab. On the right infiltrometer measurement for deriving hydraulic properties in the field (Italy).

Salinity measurements conducted by using WET Sensor (Egypt)

Salinity measurements conducted by using WET Sensor (Egypt)

 
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Field measurements and soil sampling (Tunisia)

Interaction with Fatnassa farmers  (Tunisia)

Interaction with Fatnassa farmers  (Tunisia)

Field measurements (Portugal)

Field measurements (Portugal)

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The graphs in this figure show the spatial evolution of the apparent electrical conductivity (integrated along the whole depth indicated in the curve labels) measured by the CMD sensor along each of the four transects. The labels 1dS, 2dS, 4dS and 6dS refer to the transects irrigated with water at 1, 2, 4 and 6dS/m, respectively. Each line in graph represent the average of measurements carried out along three parallel lines per transect.

The graphs in the left and right vertical panels represent data observed on 17 October 2016 and 23 November 2016, respectively. In the first date, data do not show significant differences among the four transects. By contrast, these differences become apparent on 23 November and for all the antennas configuration (either VCR or HCR) and sensor distances of 0.32, 0.71 and 1.18 m. It should be noted that even in the case of irrigation with 6dS/m saline water, the apparent electrical conductivity became not larger than 0.7dS/m.

ECa map (HDM) carried out in Kalaat Landalous (Tunisia)

ECa map (HDM) carried out in Kalaat Landalous (Tunisia)

Preliminary ECa map (VDM in mS/m) carried out in Lezírias (Portugal)

Preliminary ECa map (VDM in mS/m) carried out in Lezírias (Portugal)

An example of Salinity map in dS/m for the second plot at 10 cm depth (Egypt)

An example of Salinity map in dS/m for the second plot at 10 cm depth (Egypt)