Numerical Evaluation of Depth Effects of Double-Ring Infiltrometers on Soil Saturated Hydraulic Conductivity Measurements

2012 ◽  
Vol 76 (3) ◽  
pp. 867-875 ◽  
Author(s):  
Jianbin Lai ◽  
Yi Luo ◽  
Li Ren
Keyword(s):  
Hydraulic Conductivity ◽  
Numerical Evaluation ◽  
Saturated Hydraulic Conductivity ◽  
Conductivity Measurements ◽  
Double Ring ◽  
Depth Effects

Surface-positioned double-ring to improve traditional infiltrometer for measuring soil infiltration

Soil Research ◽  
2020 ◽  
Vol 58 (3) ◽  
pp. 314
Author(s):  
Jing Zhang ◽  
Shaopeng Li
Keyword(s):  
Hydraulic Conductivity ◽  
Measurement Accuracy ◽  
Soil Column ◽  
Saturated Hydraulic Conductivity ◽  
Experimental Results ◽  
Water Infiltration ◽  
Maximum Relative Error ◽  
Wetting Front ◽  
Double Ring ◽  
Improve Measurement

The installation of a traditional double-ring infiltrometer (DRI) into soil is difficult and time consuming. It results in reduced accuracy because of soil disturbance and water leakage along the gaps between the ring wall and the soil. In this study, a surface-positioned DRI (SPDRI) was suggested to improve measurement accuracy and convenience of the DRI. Laboratory experiments were conducted to evaluate performance of the method in terms of the influence of the lateral flow of water on the accuracy of infiltration rate, average vertical wetting front depth and saturated hydraulic conductivity. A cylindrical soil column was used to simulate the ideal ring infiltrometer (IRI) of the one-dimensional vertical infiltration process for comparison purposes. Experimental results indicated that the infiltration rates measured by the SPDRI and IRI were nearly identical, with maximum relative error (RE) of 18.75%. The vertical wetting front depth of the SPDRI was nearly identical to that of the IRI, with proportional coefficients of 0.97 and R2 > 0.95. Comparison of the soil saturated hydraulic conductivity with those from IRI indicated that the REs were 7.05–10.63% for the SPDRI. Experimental results demonstrated that the SPDRI could improve the measurement accuracy and facilitate the soil water infiltration measurement process.

Simulating Soil-Water Movement through Loess-Veneered Landscapes Using Nonconsilient Saturated Hydraulic Conductivity Measurements

2014 ◽  
Vol 78 (4) ◽  
pp. 1320-1331 ◽  
Author(s):  
T. N. Williamson ◽  
B. D. Lee ◽  
P. J. Schoeneberger ◽  
W. M. McCauley ◽  
S. J. Indorante ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Soil Water ◽  
Water Movement ◽  
Saturated Hydraulic Conductivity ◽  
Conductivity Measurements ◽  
Soil Water Movement

scholarly journals The impact of different tillage treatments on hydraulic conductivity of loamy soil

2012 ◽  
Vol 60 (5) ◽  
pp. 109-114 ◽  
Author(s):  
Ivana Kameníčková ◽  
L. Larišová ◽  
A. Stoklásková
Keyword(s):  
Hydraulic Conductivity ◽  
Conventional Tillage ◽  
Saturated Hydraulic Conductivity ◽  
Water Infiltration ◽  
Reduced Tillage ◽  
Loamy Soil ◽  
Double Ring ◽  
Unsaturated Hydraulic Conductivity ◽  
The Impact

Water infiltration into the soil profile, surface runoff and soil erosion in arable lands depend on the conditions of the top layer. The tillage treatment of the top layer plays a key role in changes of the hydro-physical properties, mainly saturated hydraulic conductivity Ks of the surface layer. The aim of this study was to asses the impact of different tillage treatments on hydraulic conductivity in the locality Bohaté Málkovice. Field experimental works in this area were performed in 2009 and were repeted in 2011 on Haplic Chernozem, medium heavy loamy soil. The experimental area was divided into two parts; top layer of these plots was cultivated by applying conventional and reduced tillage treatment. Both these plots were sown with spring barley (Hordeum vulgare). For the field measurement of water infiltration into the soil was used double-ring infiltrometer (2009, 2011) and Minidisk infiltrometer (2011). Near the point were the infiltration was measured, the soil samples were always collected for laboratory determination of basic physical properties of soil (bulk density, porosity, initial and saturated water content, aeration of the soil) and saturated hydraulic conductivity Ks. For laboratory determination of Ks was used permeameter with constant gradient.For evaluation of saturated hydraulic conductivity Ks using the double-ring infiltration method was used Philip’s three-parameter equation and for evaluation of unsaturated hydraulic conductivity K(h) using Minidisk infiltrometer was used Zang’s method. After two years of using repeatedly applied different tillage treatments was significantly influenced saturated hydraulic conductivity Ks. The Ks value increased approximately six times for reduced tillage and more than three times for conventional tillage. Laboratory determined average values of Ks were compared with the average estimates of Ks from infiltration tests. The results were burdened by a number of errors (compaction, preferential flow). These mean values were higher for conventional and reduced tillage. Unsaturated hydraulic conductivity K(−2cm) for reduced tillage was higher, for conventional tillage decreased approximately three times.

scholarly journals Mapping topsoil field-saturated hydraulic conductivity from point measurements using different methods

2017 ◽  
Vol 65 (3) ◽  
pp. 264-275 ◽  
Author(s):  
Isabelle Braud ◽  
Jean-François Desprats ◽  
Pierre-Alain Ayral ◽  
Christophe Bouvier ◽  
Jean-Pierre Vandervaere
Keyword(s):  
Hydraulic Conductivity ◽  
Land Cover ◽  
Statistical Tests ◽  
Regional Scale ◽  
Saturated Hydraulic Conductivity ◽  
Data Set ◽  
Double Ring ◽  
Gis Data ◽  
Distributed Hydrological Models ◽  
Geological Formations

AbstractTopsoil field-saturated hydraulic conductivity,Kfs, is a parameter that controls the partition of rainfall between infiltration and runoff and is a key parameter in most distributed hydrological models. There is a mismatch between the scale of local in situKfsmeasurements and the scale at which the parameter is required in models for regional mapping. Therefore methods for extrapolating localKfsvalues to larger mapping units are required. The paper explores the feasibility of mappingKfsin the Cévennes-Vivarais region, in south-east France, using more easily available GIS data concerning geology and land cover. Our analysis makes uses of a data set from infiltration measurements performed in the area and its vicinity for more than ten years. The data set is composed ofKfsderived from infiltration measurements performed using various methods: Guelph permeameters, double ring and single ring infiltrotrometers and tension infiltrometers. The different methods resulted in a large variation inKfsup to several orders of magnitude. A method is proposed to pool the data from the different infiltration methods to create an equivalent set ofKfs. Statistical tests showed significant differences inKfsdistributions in function of different geological formations and land cover. Thus the mapping ofKfsat regional scale was based on geological formations and land cover. This map was compared to a map based on the Rawls and Brakensiek (RB) pedotransfer function (mainly based on texture) and the two maps showed very different patterns. The RB values did not fit observed equivalentKfsat the local scale, highlighting that soil texture alone is not a good predictor ofKfs.

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