Article (Scientific journals)
Transposability of pedotransfer functions for estimating water retention of Algerian soils
Touil, Sami; Degré, Aurore; Chabaca, Mohamed Nacer
2015In Desalination and Water Treatment, p. 1-9
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Keywords :
pedotransfer function; field capacity; wilting point
Abstract :
[en] Testing the efficiency of a pedotransfer function (PTF) outside of its development data-set is one of the best ways for assessing its robustness. An important question which remains unanswered is how transposable are PTFs to other agropedoclimatic contexts? Models developed and validated in a particular pedoclimatic context have been relatively little tested in other contexts. Particularly, no studies have been conducted until now to evaluate the PTFs for Algerian soils. In this study, eight (8) PTFs most frequently cited were considered. We used them to evaluate soil water retention at field capacity (FC) and wilting point (WP) on a set of 134 samples collected in the low Cheliff. The calculated Akaike information criterion and root mean square errors values showed that the Rawls, and Ghorbani Dashtaki et Homaee type 1 models were the best in estimation of soil water retention at FC (–709.795, 0.070 cm3 cm−3) and WP (–733.480, 0.064 cm3 cm−3). The poorer performances were presented by the PTFs developed on soils from Europe or United States where the organic matter values were much higher than the Algerian soils. However, the transposability of the PTFs formed from data spread from a wider area, produce more accurate predictions than those built from local data.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Touil, Sami;  Superior National School of Agronomy, El Harrach, Algiers, Algeria > Rural Engineering Department
Degré, Aurore  ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Chabaca, Mohamed Nacer;  Superior National School of Agronomy, El Harrach, Algiers, Algeria > Rural Engineering Department
Language :
English
Title :
Transposability of pedotransfer functions for estimating water retention of Algerian soils
Publication date :
2015
Journal title :
Desalination and Water Treatment
ISSN :
1944-3994
eISSN :
1944-3986
Publisher :
Taylor & Francis
Pages :
1-9
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 March 2015

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