Paper Information

Journal:   IRANIAN OF IRRIGATION & WATER ENGINEERING   SUMMER 2017 , Volume 7 , Number 28 #A0035; Page(s) 37 To 53.
 
Paper: 

COMPARISON OF MODIFIED CL AND DL METHODS WITH THE MAIN BEERKAN INFILTRATION EXPERIMENT ALGORITHM (BESTSLOPE) FOR DETERMINING SATURATED HYDRAULIC CONDUCTIVITY

 
 
Author(s):  AHMADY TAROKH, AFRASIAB PEYMAN*, DELBARI MASOOMEH
 
* UNIVERSITY OF ZABOL
 
Abstract: 

The Beerkan single ring infiltration experiment is a simple and inexpensive method for estimating soil hydraulic properties and is gaining scientist's attention in recent years. The purpose of present study was to compare the performance of modified forms of CL (cumulative linearization) and DL (derivative linearization) methods with the main Beerkan algorithm (i.e. BEST slope) in estimating saturated hydraulic conductivity (Ks) and the value of a (i.e. the ratio of gravity force to the capillary force) in the modified forms of CL and DL. For this purpose a number of 113 Beerkan infiltration experiments were carried out in Sistan Dam' research field.
The negative values of Ks estimated by the BEST slope algorithm were eliminated and the 101 remaining experiments were selected for final analysis. According to the results, Ks values estimated by DL and CL were negative in most Beerkan experiments while the modified DL and CL methods resulted in positive values in all cases. The results were compared using a weighted coefficient of determination (
wr2). According to the results, the Ks values estimated by the modified DL were more similar to those obtained by BEST slope algorithm (wr2=0.8135) when compared to those obtained by the CL method (wr2=0.7506). Besides, the difference between Ks values estimated by BEST slope algorithm and the modified DL or CL methods decreased as the percentage of clay increased. The calculated value of a in modified DL (a=0.019) was more similar to that reported previous studies (in similar soil texture, i.e. loam and sandy loam) than that obtained in CL model (a=0.023).

 
Keyword(s): BEERKAN INFILTRATION EXPERIMENT, SORPTIVITY, GRAVITY FORCE, CAPILLARY FORCE, SATURATED HYDRAULIC CONDUCTIVITY
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 24
 
Latest on Blog
Enter SID Blog