Spatial variability of soil water content and salinity in a semi-arid agricultural field
Hamed Abd El Mageed, Yasser LU ; Persson, Magnus LU and Berndtsson, Ronny LU
(2014)
In Vatten: tidskrift för vattenvård /Journal of Water Management and research
p.151-157
- 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... (More) - 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. (Less) - Abstract (Swedish)
- En teknik för att förhindra yterosion och samla ytavrinning är bygga jordvallar (1–1,5 m höga) parallellt medhöjdkurvorna. Denna teknik används över stora områden i Tunisien. I denna studie undersöks hur dessa jord-vallar påverkar ytjordens rumsliga variabilitet av markvattenhalt (θ) och salinitet, dels uttryckt som jordenstotala elektriska konduktivitet (σa) och dels som porvattnets elektriska konduktivitet (σw). Totalt mättes dessaparametrar i 258 punkter i ett 80 x 120 m stort område i El-Gouazine i centrala Tunisien. De tre parametrarnauppvisade en till synes slumpmässig rumslig variabilitet, men en geostatistisk analys visade ett rumsligt be-roende. En variationsanalys visade på små mätfel i jämförelse med småskalig rumslig variation.... (More)
- En teknik för att förhindra yterosion och samla ytavrinning är bygga jordvallar (1–1,5 m höga) parallellt medhöjdkurvorna. Denna teknik används över stora områden i Tunisien. I denna studie undersöks hur dessa jord-vallar påverkar ytjordens rumsliga variabilitet av markvattenhalt (θ) och salinitet, dels uttryckt som jordenstotala elektriska konduktivitet (σa) och dels som porvattnets elektriska konduktivitet (σw). Totalt mättes dessaparametrar i 258 punkter i ett 80 x 120 m stort område i El-Gouazine i centrala Tunisien. De tre parametrarnauppvisade en till synes slumpmässig rumslig variabilitet, men en geostatistisk analys visade ett rumsligt be-roende. En variationsanalys visade på små mätfel i jämförelse med småskalig rumslig variation. En potentiellrisk med jordvallarna är att salt ska ackumuleras i det översta jordlagret just uppströms vallarna. I vår studiekunde dock ingen förhöjd salinitet påvisas. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/154b19f1-41a3-4d51-be95-819ff0f5a289
- author
- Hamed Abd El Mageed, Yasser
LU
; Persson, Magnus
LU
and Berndtsson, Ronny
LU
- organization
- alternative title
- rumslig variabilitet av markvattenhalt och salinitet i ett semiaritt fält
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Vatten: tidskrift för vattenvård /Journal of Water Management and research
- pages
- 7 pages
- publisher
- Föreningen Vatten
- ISSN
- 0042-2886
- language
- English
- LU publication?
- yes
- id
- 154b19f1-41a3-4d51-be95-819ff0f5a289
- alternative location
- https://www.tidskriftenvatten.se/wp-content/uploads/2017/04/48_article_4749.pdf
- date added to LUP
- 2023-10-03 11:33:36
- date last changed
- 2023-10-17 02:48:18
@article{154b19f1-41a3-4d51-be95-819ff0f5a289,
abstract = {{One technique for collecting rainwater and prevent soil erosion applied on large areas in Tunisia involves the<br/>use of soil ridges (1–1.5 m high). These contour ridges are constructed parallel to topographical isolines. The<br/>effects of the contour ridges on the soil water content (θ) distribution, bulk soil salinity σa, and soil water salin-<br/>ity (σw) were investigated in the catchment of El-Gouazine in central Tunisia. In total 258 measuring points<br/>were obtained in an 80 m x 120 m area. Spatial maps of σw, σa, and θ displayed essentially a random variation<br/>and no apparent pattern within the sampling area. A geostatistical analysis, however, displayed spatial correla-<br/>tion for all variables. A variational analysis displayed small measurement errors as compared to small-scale vari-<br/>ation in the soil. A potential risk with soil ridges could be salt accumulation just upstream the ridges, however,<br/>no such effect could be observed in the studied area.}},
author = {{Hamed Abd El Mageed, Yasser and Persson, Magnus and Berndtsson, Ronny}},
issn = {{0042-2886}},
language = {{eng}},
pages = {{151--157}},
publisher = {{Föreningen Vatten}},
series = {{Vatten: tidskrift för vattenvård /Journal of Water Management and research}},
title = {{Spatial variability of soil water content and salinity in a semi-arid agricultural field}},
url = {{https://www.tidskriftenvatten.se/wp-content/uploads/2017/04/48_article_4749.pdf}},
year = {{2014}},
}