A Simplified Falling-Head Technique for Rapid Determination of Field-Saturated Hydraulic Conductivity

2004 ◽  
Vol 68 (1) ◽  
pp. 66-73 ◽  
Author(s):  
V. Bagarello ◽  
M. Iovino ◽  
D. Elrick
Keyword(s):  
Hydraulic Conductivity ◽  
Rapid Determination ◽  
Saturated Hydraulic Conductivity

scholarly journals Comparison of pedotransfer functions for the determination of saturated hydraulic conductivity coefficient

2017 ◽  
Vol 28 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Marek Ryczek ◽  
Edyta Kruk ◽  
Magdalena Malec ◽  
Sławomir Klatka
Keyword(s):  
Hydraulic Conductivity ◽  
Direct Methods ◽  
Laboratory Method ◽  
Saturated Hydraulic Conductivity ◽  
Pedotransfer Functions ◽  
United States Bureau ◽  
Empirical Methods ◽  
Mean Values ◽  
Bureau Of Reclamation

Abstract On one hand, direct methods of measurement of saturated hydraulic conductivity coefficient are time consuming, and on the other hand, laboratory methods are cost consuming. That is why the popularity of empirical methods has increased. Their main advantages are speed of calculations and low costs. Comparison of various empirical methods (pedotransfer functions) for the determination of saturated hydraulic conductivity coefficient was the purpose of this work. The methods used were Shepard’s, Hazen’s, USBR (United States Bureau of Reclamation), Saxton et al.’s, Kozeny–Carman’s, Krüger’s, Terzaghi’s, Chapuis’s, Sheelheim’s, Chapuis’, and NAVFAC (Naval Facilities Engineering Command) methods. Calculations were carried out for the soil samples of differential texture. The obtained results shows the methods used for the determination of permeability coefficient differ considerably. Mean values obtained by analysed methods fluctuated between 0.0006 and 12.0 m·day−1. The results of calculations by the chosen methods were compared with the results of the laboratory method. The best compatibility with laboratory method was obtained by using the Terzaghi method.

scholarly journals Interpretation of ponded infiltration data using numerical experiments

2016 ◽  
Vol 64 (3) ◽  
pp. 289-299 ◽  
Author(s):  
Michal Dohnal ◽  
Tomas Vogel ◽  
Jaromir Dusek ◽  
Jana Votrubova ◽  
Miroslav Tesar
Keyword(s):  
Hydraulic Conductivity ◽  
Saturated Hydraulic Conductivity ◽  
Experimental Conditions ◽  
Insertion Depth ◽  
Retention Capacity ◽  
Soil Layering ◽  
Soil Hydraulic ◽  
The Impact ◽  
Infiltration Experiment

AbstractPonded infiltration experiment is a simple test used for in-situ determination of soil hydraulic properties, particularly saturated hydraulic conductivity and sorptivity. It is known that infiltration process in natural soils is strongly affected by presence of macropores, soil layering, initial and experimental conditions etc. As a result, infiltration record encompasses a complex of mutually compensating effects that are difficult to separate from each other. Determination of sorptivity and saturated hydraulic conductivity from such infiltration data is complicated. In the present study we use numerical simulation to examine the impact of selected experimental conditions and soil profile properties on the ponded infiltration experiment results, specifically in terms of the hydraulic conductivity and sorptivity evaluation. The effect of following factors was considered: depth of ponding, ring insertion depth, initial soil water content, presence of preferential pathways, hydraulic conductivity anisotropy, soil layering, surface layer retention capacity and hydraulic conductivity, and presence of soil pipes or stones under the infiltration ring. Results were compared with a large database of infiltration curves measured at the experimental site Liz (Bohemian Forest, Czech Republic). Reasonably good agreement between simulated and observed infiltration curves was achieved by combining several of factors tested. Moreover, the ring insertion effect was recognized as one of the major causes of uncertainty in the determination of soil hydraulic parameters.

Sign in / Sign up

Export Citation Format

Share Document