Soil Hydraulic Conductivity Articles & Analysis
35 articles found
What Is the Chemical Stabilization of Soil? Simply put, chemical stabilization of soil involves adding chemicals to the soil to change the soil structure. ...
These preferential flow paths prevent the homogenous delivery of reagents to the impacted soils. They also limit the extraction of fluids from all soils encountered by the wellbore. Thus, coarse gained soils with higher permeabilities receive the greatest amount of treatment while fine grained low permeability soils receive ...
Evapotranspiration is estimated using the data from a 5-parameter MetOne (MSO) all-in-one multiparameter sensor, a MetOne 370 precipitation gauge, and an Apogee SP-212 pyranometer. Volumetric soil moisture content is monitored with 20 Stevens HydraProbe soil probes, and allows for estimation of the soil water storage. Eight Tensiomark sensors are ...
A new study published in the Soil Science Society of America Journal investigated the field performance of 5 soil moisture instruments in heavy clay soils. ...
Recent Activities in Soil Physics The CEPHaS project is a joint undertaking between colleagues in Zambia, Zimbabwe, Malawi and the UK to strengthen our shared capacity to study how conservation agriculture practices affect the behaviour of water in soil, crop and groundwater systems. Key to this is the use of new methods to study soil water, both in the field and the laboratory. The University ...
The proper description of the seepage line is affected by the difficulty of estimating the hydraulic parameters, mainly the soil hydraulic conductivity. Therefore, the development of simple methods for a quick analysis of extended levee systems is fundamental to identify critical points. In this context, a practical procedure, ...
The objective of this study is to investigate the effects of the Priestley–Taylor (P–T), Hargreaves, and Penman–Monteith methods on daily streamflow simulation using the Soil and Water Assessment Tool (SWAT) for the southeastern United States. ...
Aiming at quantifying the impacts of soil properties on rainfall–runoff processes, the soil saturated hydraulic conductivity (Ks) and the soil erodibility factor (K) were selected and incorporated into the classical topographic index ln(α/tanβ) (TI) to construct a modified topographic index (TI′). ...
A major CSM refinement involved determining how to best measure and assess the mass discharge reduction goal while considering the significantly varying hydraulic conductivities, which range from 0.3 to 3,550 feet/day (ft/d) over relatively small vertical distances within the heterogeneous soil. ...
The hydrologic model Storm Water Management Model (SWMM) is used to simulate the relevant flows of a bioretention system with parametric variations of the watershed area ratio and hydraulic conductivity of the soil media. Under these two dominant performance-governing parameters, retention ratios are calculated using the 10-year ...
In this study, three lateritic soil samples compacted at 2% wet of optimum moisture content with British Standard Light (BSL) effort were permeated with acetone and ethanol over a range of concentrations (0, 25, 50, 75, 100%), while benzene and heptane were used at full strength. Hydraulic conductivity of specimens permeated with diluted ...
Lateritic soil treated with up to 12% bagasse ash content was compacted using reduced Proctor, standard Proctor, West African Standard and modified Proctor energies at −2, 0, 2 and 4% of optimum moisture content. The effects of moulding water, water content relative to optimum, initial degree of saturation at compaction, void ratio, bagasse ash content and compactive ...
The infiltration rate is found to be controlled by the hydraulic conductivity of the surrounding soil, the total hydraulic head above the sewer pipe, the size of the sewer pipe, the position of the defect, and the size of the ...
Compatibility tests were carried out on lateritic soil treated with up to 12% bagasse ash compacted at about 2% wet of their respective optimum moistures using the standard Proctor energy. Samples were sequentially permeated with distilled water and municipal solid waste (MSW) leachate for 22 and 69 days, respectively, until steady flows were established. The final ...
This study aimed to quantify the water conducting macroporosity (WCM) in a range of soils in South Africa and to develop three pedotransfer functions (PTFs) able to predict WCM. Saturated (Ks) and unsaturated (K30) conductivities were measured in situ on 120 soil profiles using double ring and tension infiltrometers methods. ...
The fortified soil had bigger porosity and higher hydraulic conductivity than the natural soil. ...
Winter maintenance proved to be a problem, together with the snow from the parking place a lot of gravel and fine particles were deposited at one end of the swale. This decreased the hydraulic conductivity at that point significantly. The laboratory tests with soil columns showed an increase of flow time through the soil column ...
B. indica's ability to reduce hydraulic conductivity was evaluated using rigid wall soil columns inoculated with the bacteria. B. indica formed a large quantity of strongly adhesive biofilm among soil particles, reducing the hydraulic conductivity in the soil columns by 2 or 3 ...
Laboratory testing was conducted to assess the feasibility of using lateritic soil mixed with up to 15% blast furnace slag (BFS) by dry weight of soil as a suitable hydraulic barrier. ...
We incorporated laboratory-measured saturated soil hydraulic conductivity results into the model to examine the seepage ratio of PAM-treated vs. untreated soils and the sensitivity of the seepage ratio. In cases where PAM applications and suspended sediment concentration (SSC) treatment were effective, the uncertainty in the ...