Abstract
One technique for collecting rainwater and prevent soil erosion applied on large areas in Tunisia involves the
use of soil ridges (1–1.5 m high). These contour ridges are constructed parallel to topographical isolines. The
effects of the contour ridges on the soil water content (θ) distribution, bulk soil salinity σa, and soil water salin-
ity (σw) were investigated in the catchment of El-Gouazine in central Tunisia. In total 258 measuring points
were obtained in an 80 m x 120 m area. Spatial maps of σw, σa, and θ displayed essentially a random variation
and no apparent pattern within the sampling area. A geostatistical analysis, however, displayed spatial correla-
tion for all variables. A variational analysis displayed small measurement errors as compared to small-scale vari-
ation in the soil. A potential risk with soil ridges could be salt accumulation just upstream the ridges, however,
no such effect could be observed in the studied area.
use of soil ridges (1–1.5 m high). These contour ridges are constructed parallel to topographical isolines. The
effects of the contour ridges on the soil water content (θ) distribution, bulk soil salinity σa, and soil water salin-
ity (σw) were investigated in the catchment of El-Gouazine in central Tunisia. In total 258 measuring points
were obtained in an 80 m x 120 m area. Spatial maps of σw, σa, and θ displayed essentially a random variation
and no apparent pattern within the sampling area. A geostatistical analysis, however, displayed spatial correla-
tion for all variables. A variational analysis displayed small measurement errors as compared to small-scale vari-
ation in the soil. A potential risk with soil ridges could be salt accumulation just upstream the ridges, however,
no such effect could be observed in the studied area.
| Translated title of the contribution | rumslig variabilitet av markvattenhalt och salinitet i ett semiaritt fält |
|---|---|
| Original language | English |
| Pages (from-to) | 151-157 |
| Number of pages | 7 |
| Journal | Vatten: tidskrift för vattenvård /Journal of Water Management and research |
| Publication status | Published - 2014 |
Subject classification (UKÄ)
- Soil Science
