2024-03-28T12:32:20Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/626822016-11-24T09:23:31Zcom_10261_75com_10261_6col_10261_328
Microflowmeter-tension disc infiltrometer: Part II - Hydraulic properties estimation from transient infiltration rate analysis
Moret-Fernández, David
Latorre Garcés, Borja
González-Cebollada, César
Sorptivity
Hydraulic conductivity
Cumulative infiltration
28 Pags., 6 Figs., 3 Tabls. The definitive version is available at: http://www.sciencedirect.com/science/journal/00221694
Measurements of soil sorptivity (S0) and hydraulic conductivity (K0) are of paramount importance for many soil-related studies involving disciplines such as agriculture, forestry and hydrology. In the last two decades, the disc infiltrometer has become a very popular instrument for estimations of soil hydraulic properties. The previous paper in this series presented a new design of disc infiltrometer that directly estimates the transient flow of infiltration rate curves. The objective of this paper is to present a simple procedure for estimating K0 and S0 from the linearisation of the transient infiltration rate curve with respect to the inverse of the square root of time (IRC). The technique was tested in the laboratory on 1D sand columns and 1D and 3D 2-mm sieved loam soil columns and validated under field conditions on three different soil surfaces. The estimated K0 and S0 were subsequently compared to the corresponding values calculated with the Vandervaere et al. (2000) technique, which calculates the soil hydraulic parameters from the linearisation of the differential cumulative infiltration curve with respect to the square root of time (DCI). The results showed that the IRC method, with more significant linearised models and higher values of the coefficient of determination, allows more accurate estimation of K0 and S0 than the DCI technique. Field experiments demonstrate that the IRC procedure also makes it possible to detect and eliminate the effect of the sand contact layer commonly used in the disc infiltrometry technique. Comparison between the measured and the modelled cumulative infiltration curves for the K0 and S0 values estimated by the DCI and IRC methods in all the 1D and 3D laboratory experiments and field measurements shows that the IRC technique allowed better fittings between measured and modelled cumulative infiltration curves, which indicates better estimations of the soil hydraulic properties.
This research was supported by the Ministerio de Ciencia e Innovación of Spain (Grant AGL2010-22050-C03-02).
Peer reviewed
2012-12-12T12:24:06Z
2012-12-12T12:24:06Z
2012-10
artículo
http://purl.org/coar/resource_type/c_6501
Moret-Fernández D, Latorre Garcés B, González-Cebollada C. Microflowmeter-tension disc infiltrometer: Part II - Hydraulic properties estimation from transient infiltration rate analysis. Journal of Hydrology 466:159-166 (2012)
0022-1694
http://hdl.handle.net/10261/62682
10.1016/j.jhydrol.2012.04.047
en
http://dx.doi.org/10.1016/j.jhydrol.2012.04.047
open
Elsevier