Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)   2012 , Volume 19 , Number 2; Page(s) 1 To 22.
 
Paper: 

EVALUATION AND COMPARISON BETWEEN SOME POINT AND PARAMETRIC PEDOTRANSFER FUNCTIONS IN PREDICTING SOIL WATER CONTENTS IN DIFFERENT MATRIC POTENTIALS

 
 
Author(s):  HAGHVERDI A., GHAHREMAN B.*, KHOSHNOUD YAZDI A.A., JOLEINI M., ARABI Z.
 
* DEPT. OF WATER ENGINEERING, FERDOWSI UNIVERSITY OF MASHHAD
 
Abstract: 

Using direct measurement techniques for estimation of soil hydrological parameters, are time consuming and expensive. One possible solution to this problem is to derive a mathematical relationship between easily measurable soil parameters, such as soil texture, bulk density and organic matter content, and other hard-measurable soil hydraulic parameters. Such a relationship is called pedotransfer function (PTF). In this study, we used 8 point PTFs and 4 parametric PTFs for predicting water content corresponding to different matric potentials for 122 soil samples taken from north and north-east of Iran. Parametric PTFs has been derived to estimate the coefficients of four different water retention functions of van Genuchten, Hutson and Cass, Campbell, and Brooks-Corey. BSS TOPSOIL method (Hutson and Wagenet, 1992; with input variables of soil fractions, Organic Carbon content, and bulk density) with correlation coefficient (r) of 0.75 and root mean square error (RMSE) of 0.033 was the best and Hutson method (Hutson and Wagenet, 1992; with input variables of soil fractions, and bulk density) with R=0.59 and RMSE=0.061 was the worst method in Point PTFs. The best (r=0.90, RMSE=0.037) parametric PTF was due to Campbell (Campbell, 1085) and the worst (r=0.52, RMSE=0.12) one was due to Vereecken (Vereecken et al., 1989).
The results showed that including Organic Carbon content as an input variable in PTFs, improves the predictability of soil water content. On overal, the performance of all PTFs increased when the matric potential increased.

 
Keyword(s): NORTH AND NORTHEAST OF IRAN, PEDOTRANSFER FUNCTIONS, WATER RETENTION CURVE
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 54
 
Latest on Blog
Enter SID Blog