Modification of inverse auger hole method for saturated hydraulic conductivity measurement

Ojha, Rohit Pratap; Verma, Chhedi Lal; Denis, D. M.; Singh, Charnjeet; Kumar, Manjul

doi:10.5958/2455-7145.2017.00011.x

Cited by 5 publications

(9 citation statements)

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“…The equation ( 1) was derived for a flat bottom auger hole but the auger used for making a hole in the soil can not make a flat bottom instead it may create different types of a cavity at the bottom of the auger hole. Ojha et al (2017) modified the expression for calculating K s using an inverse auger hole from flat bottom to hemispherical cavity at the bottom and tested it in medium texture soils. Their model for saturated hydraulic conductivity from inverse auger hole with a hemispherical cavity at the bottom reads as below.…”

Section: Inverse Auger Hole With Hemi-spherical Bottom (Iahwhsb)mentioning

confidence: 99%

“…When soil is stable and the auger tip is long conical the bottom geometry would be a cone. Ojha et al (2018) further modified the Hoorn (1979) equation ( 1) for conical bottom geometry of inverse auger hole as below.…”

Section: Inverse Auger Hole With Conical Bottom (Iahwcb)mentioning

confidence: 99%

“…Hoorn (1979) gave an equation for the calculation of K s from an inverse auger hole with a flat bottom (IAHWFB). Ojha et al, (2017Ojha et al, ( ), (2018Ojha et al, ( ), and (2019 modified the IAH method with a flat bottom to hemispherical, conical, and equivalent cylindrical bottom flow conditions for K s measurement. The present study was undertaken to compare the K s values obtained from IAH methods with different bottom flow geometries.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of Saturated Hydraulic Conductivity of Reclaimed Sodic Soils by Inverse Auger Hole Methods with Different Bottom Geometries

Verma¹,

Jha²,

Arora³

et al. 2022

JNRCM

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Saturated hydraulic conductivity (K s ) is needed for the design of groundwater recharge, irrigation systems, subsurface drainage systems, and ground water abstraction structures. Infiltrometer and inverse auger hole methods (IAHM) are used for measuring in situ surface and subsurface K s of soil. IAHM with various bottom geometries recently became available for field application. Bottom flow geometries of augers depend on the shape of the auger bit and soil types. In medium textured soil with medium size auger bit creates a hemispherical cavity while in heavy textured stable soil with a long auger bit conical cavity is formed. The conical frustum at the bottom is formed with a long conical auger bit in medium textured soil. In light textured soil, an equivalent cylindrical bottom is expected. IAH methods with flat, hemispherical, conical, frustum cone, and equivalent cylindrical bottom geometries were applied for the measurement of K s in recently tilled sodic soil and compared with the K s value obtained by the infiltrometer. The K s obtained by the infiltrometer, IAH with flat, hemispherical, conical, equivalent cylindrical, and frustum cone geometries were 1.75, 2.87, 3.06, 2.77, 3.03 and 3.58 cm day -1 , respectively. Percent deviations of K s ranged from 3.30 to 38.95% for the infiltrometer and IAH with different bottom geometries when compared with IAH with a flat bottom. In extremely dispersed sodic conditions either of the methods could be applied for in situ measurement of K s without giving much different value. The model with suitable bottom geometry based on sound hypothesis should be used for K s measurement.

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Section: Inverse Auger Hole With Hemi-spherical Bottom (Iahwhsb)mentioning

confidence: 99%

Section: Inverse Auger Hole With Conical Bottom (Iahwcb)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Saturated Hydraulic Conductivity of Reclaimed Sodic Soils by Inverse Auger Hole Methods with Different Bottom Geometries

Verma¹,

Jha²,

Arora³

et al. 2022

JNRCM

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“…During construction, different requirements have to be made to provide an effective solution. One of those requirements is road drainage systems in order to maintain the structural integrity of the roadway [22]. This measure guarantees road usability and sustainability over the long term.…”

Section: Challenges and Solutionsmentioning

confidence: 99%

Introductory Chapter: Design, Construction, and Retrofit of Bridges, Roads, and Highways

Ghaedi¹,

Gordan²,

Javanmardi³

et al. 2022

Applied Methods in Design and Construction of Bridges, Highways and Roads - Theory and Practice

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“…Tests for the determination of saturated hydraulic conductivity (K s ) were carried out in five locations (Figure 1c) using the inverse auger hole method as described by Ojha et al [38] and the procedures recommended by the Brazilian Association of Engineering and Environmental Geology [39]. The infiltration capacity was estimated in six locations using a double-ring infiltrometer (Figure 1c).…”

Section: Groundwater Levels and Soil Characteristicsmentioning

confidence: 99%

Connectivity of Ephemeral and Intermittent Streams in a Subtropical Atlantic Forest Headwater Catchment

Perez

Santos

Sá

et al. 2020

Water

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Stream network extension and contraction depend on landscape features and the characteristics of precipitation events. Although this dependency is widely recognized, the interaction among overland-flow generation processes, drainage active length, and frequency in temporary streams remains less understood. We studied a forest headwater catchment with wide variation in soil depth to investigate the runoff generation processes that lead to the occurrence of ephemeral and intermittent flow and connectivity between hillslope and outlet. We used low-cost equipment to monitor the variation in the length of the active drainage network and to measure the water table development. The flow in the channels can develop even under light rainfall conditions, while the connectivity is controlled by antecedent wetness, total precipitation, and active contribution area thresholds. Runoff permanence and fragmentation were related to soil depth variation; flow being usually more disconnected due to deeper water tables in deeper soil locations. Our findings emphasized the impact of soil structure on runoff generation in hillslopes and can be useful in the management of the most active areas and their impact on the quality of available water.

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Modification of inverse auger hole method for saturated hydraulic conductivity measurement

Cited by 5 publications

References 0 publications

Comparison of Saturated Hydraulic Conductivity of Reclaimed Sodic Soils by Inverse Auger Hole Methods with Different Bottom Geometries

Comparison of Saturated Hydraulic Conductivity of Reclaimed Sodic Soils by Inverse Auger Hole Methods with Different Bottom Geometries

Introductory Chapter: Design, Construction, and Retrofit of Bridges, Roads, and Highways

Connectivity of Ephemeral and Intermittent Streams in a Subtropical Atlantic Forest Headwater Catchment

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