Installation and field calibration of neutron‐scatter equipment for hydrologic research in heterogeneous and stony soils

Rawitz, E.

doi:10.1029/wr005i002p00519

Cited by 3 publications

(2 citation statements)

References 5 publications

(1 reference statement)

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“…Later, Reinhart (1961) assumed impermeable RFs and used their volumetric content in field samples to correct the moisture content of stony soils. Rawitz (1969) introduced a procedure to measure the moisture content of stony soils in the field using the neutron probe. In an early attempt to measure the HCC of stony soils, Mehuys et al (1975) proposed a correction factor for the WRC and HCC of stony soils based on the volume and moisture content of RFs at different soil matric potentials.…”

Section: Introductionmentioning

confidence: 99%

Rock fragments influence the water retention and hydraulic conductivity of soils

Naseri

Joshi

Iden

et al. 2023

Vadose Zone Journal

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Rock fragments (RFs) influence soil hydraulic properties (SHPs), and knowledge about the SHPs of stony soils is important in vadose zone hydrology. However, experimental evidence on effective SHPs of stony soils is still scarce and mostly restricted to water‐saturated conditions and low volumetric contents of RFs. We examined the influence of RFs on SHPs through a series of measurements. Stony soils were prepared by packing 250‐cm3 cylinders with soils of two textures (sandy loam and silt loam) and with different volumes of RFs (up to 50% v/v) with a diameter of 8–16 mm. Samples were prepared in a way that the background soils (diameter smaller than 2 mm) had identical bulk density. The simplified evaporation method was used to determine the effective SHPs of stony soils. We used the obtained SHP data to evaluate the performance of models, which predict the effective SHPs of stony soils from SHPs of the background soil. The results highlight the systematic dependency of SHPs on volumetric content of RFs. The difference between modeled and measured SHPs was substantial for cases in which the soil contained a high amount of RFs. Accounting for the moisture content of RFs improved the prediction of the effective water retention curve of stony soils compared with a simple scaling that used only the content of RFs. Among the evaluated models for the effective hydraulic conductivity, the model based on the general effective medium theory showed the best performance, particularly for low RF contents.

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Section: Introductionmentioning

confidence: 99%

Rock fragments influence the water retention and hydraulic conductivity of soils

Naseri

Joshi

Iden

et al. 2023

Vadose Zone Journal

View full text Add to dashboard Cite

show abstract

“…Later, Reinhart (1961) assumed impermeable RF and used their volumetric content in field samples to correct the moisture content of stony soils. Rawitz (1969) introduced a procedure to measure the moisture content of stony soils in the field using the neutron probe. In an early attempt to measure the hydraulic conductivity of stony soils, Mehuys et al (1975) proposed a correction factor for the WRC and HCC of stony soils based on the volume and moisture content of RF at different soil matric potentials.…”

Section: Introductionmentioning

confidence: 99%

Rock fragments influence the water retention and hydraulic conductivity of soils

Naseri

Joshi

Iden

et al. 2022

Preprint

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Rock fragments (RF) influence soil hydraulic properties (SHP) and knowledge about the SHP of stony soils is important in vadose zone hydrology. However, experimental evidence on effective SHP of stony soils is still scarce and mostly restricted to water-saturated conditions and low volumetric contents of RF. We examined the influence of RF on SHP through a series of measurements. Stony soils were prepared by packing 250 cm3 cylinders with soils of two textures (sandy loam and silt loam) and with different volumes of RF (up to 50 % v/v) with a diameter of 8-16 mm. Samples were prepared in a way that the background soils (diameter smaller than 2 mm) had identical bulk density. The simplified evaporation method was used to determine the effective SHP of stony soils. We used the obtained SHP data to evaluate the performance of models, which predict the effective SHP of stony soils from SHP of the background soil. The results highlight the systematic dependency of Rock fragments influence the water retention and hydraulic conductivity of soils

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Use of the Mass Balance Method for Examining the Role of Soils in Controlling Watershed Performance

Rawitz¹,

Engman²,

Cline³

1970

Water Resources Research

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A two year preliminary study of the water balance of a 16.2‐hectare watershed in Pennsylvania showed that spring and summer storms produced practically no overland surface runoff during the storms, but these storms did produce typical hydrographs having all the characteristics usually attributed to surface runoff. Less than 5% of the rainfall, and one third or less of the total runoff appeared as storm runoff. Since virtually all the water eventually reaching the stream channels infiltrated the soil and most of it percolated through the soil, the properties of the soil and the amount of water stored in this layer emerge as the most important regulators of runoff in the system.

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Installation and field calibration of neutron‐scatter equipment for hydrologic research in heterogeneous and stony soils

Cited by 3 publications

References 5 publications

Rock fragments influence the water retention and hydraulic conductivity of soils

Rock fragments influence the water retention and hydraulic conductivity of soils

Rock fragments influence the water retention and hydraulic conductivity of soils

Use of the Mass Balance Method for Examining the Role of Soils in Controlling Watershed Performance

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