This study presents physical observations and insights into particle migration characteristics throughout the suffusion process. Using a purpose-built coaxial permeameter cell, experiments were conducted on idealised internally unstable gap-graded granular soils at varying fines content hydraulic loading conditions. The specimens prepared with mixture layer comprising finer coarser fractions un...

Slope failure is a common phenomenon all over the world on both man-made and natural slopes. Prolonged rainfall one of climatic factors which largely responsible for slope failure. During heavy prolonged rainfall, part rainwater infiltrates through soil seeps into slope. The infiltrated water lowers matric suction increases porewater pressure. Eventually, generated pressure decreases strength r...

[1] Hydraulic tomography is a promising approach for obtaining information on variations in hydraulic conductivity on the scale of relevance for contaminant transport investigations. This approach involves performing a series of pumping tests in a format similar to tomography. We present a field-scale assessment of hydraulic tomography in a porous aquifer, with an emphasis on the steady shape a...

This study demonstrates the spatial and temporal variations of streambed vertical hydraulic conductivity Kv from October 2011 to November 2014 along the Weihe River, the largest tributary of the Yellow River. The streambed Kv values of a total number of 385 locations from five test sites were estimated on the basis of in situ falling-head standpipe permeameter tests. The difference of Kv values...

Batch tests and column tests were performed to determine the design factors for permeable reactive barriers (PRBs) against the contaminated groundwater by ammonium and heavy metals. Clinoptilolite, one of the natural zeolites having excellent cation exchange capacity (CEC), was chosen as the reactive material. In the batch tests, the reactivity of clinoptilolite to ammonium, lead, and copper wa...

The study of the hydraulic behaviour compacted soils in partially saturated conditions is essential for understanding engineering performance geotechnical structures such as river embankments. paper presents results an experimental focusing on effects initial water content and dry density soil retention curve (SWRC) volume change a mixture under loading. For this purpose, specimens at different...

Superabsorbent polymers (hydrogels) have been studied for their ability to influence soil hydraulic conductivity because they can store and release water due swelling properties. However, concerns related the increased use of synthetic hydrogels necessitates a switch bio-based hydrogels, which are renewable more biodegradable in comparison hydrogels. In this study, we synthesized lignin-based h...

This paper discusses the reconstruction of three-dimensional material structures of pervious concretes using two-dimensional digital images obtained from actual specimens, and computational permeability predictions using these reconstructed three-dimensional material structures. The computer programs developed at the National Institutes of Standards and Technology (NIST) are used to obtain thre...

The hyporheic zone regulates physicochemical processes in surface-groundwater systems and can be an important source of heavy metals in fluvial systems. This study assesses the pore water concentrations and diffusive fluxes of heavy metals with respect to the vertical water exchange flux (VWEF) and sediment grain size. Water and sediment samples were collected on August 2016 from upstream Site ...

Vertical flow systems (VFS) are a type of passive treatment unit process in which acid mine drainage (AMD) flows vertically through layers of organic matter and limestone. Located in the coal belt of eastern Oklahoma, the Red Oak VFS was constructed to address AMD exiting an abandoned underground coal mine. The passive treatment system consists of five cells, alternating between surface flow (c...