Composite liners with a geomembrane and either a compacted clay or a geosynthetic clay liner are widely used to minimize leakage from landfills and other containment systems such as leachate lagoons. While much work has been done to quantify the rates of leakage, few papers assess the impact of this leakage on groundwater quality. This is particularly important for organic contaminants because ...

[1] This paper investigated the interaction of groundwater and seawater in a tidally influenced gravel beach. Field observations of water table, pore water salinity were performed. The two‐dimensional finite element model MARUN was used to simulate observed water table and salinity. Based on field observations and model calibrations, a two‐layered beach structure was identified which is charact...

Virus removal from groundwater by soil passage often appears to be much higher during the first few metres due to the presence of more favorable sites for attachment than thereafter. A model is presented which interprets virus removal as a function of collision efficiencies αβ and αλ, inactivation rate coefficient μl and rate parameter γ. Initial high removal is determined by ab, which decrease...

The Mixing Cell Model (MCM) is a useful tool that can be applied to areas with limited hydrogeological data, such as arid areas in northwest China, to transform available groundwater hydrochemical data into quantitative information about an aquifer. In this study, we used the MCM to quantify water circulation in the study area and to analyze information such as the supply source composition and...

Abstract—In this paper, effect of marginal quality groundwater on yield of cotton crop and soil salinity was studied. In this connection, three irrigation treatments each with four replications were applied. These treatments were i) use of canal water (T1), ii) use of marginal quality groundwater from tubewell (T2), and iii) conjunctive use by mixing with the ratio of 1:1 of canal water and mar...

Spatially and temporally continuous temperature measurements were collected over 32 h using a fiber-optic distributed temperature sensing (DTS) system deployed along 330 m of two intertidal saltmarsh channel beds in northern California. Measured temperature gradients imparted ecosystem-scale structure to the saltmarsh tidal channel thermal regime, which was punctuated by potential warm and cold...

Hydrothermally altered igneous rock and mudstone formed under the sea are often rich in arsenic (As). Therefore, As leaching from these rocks excavated during construction work may affect the surrounding soils and groundwater. High-volume, low-concentration contaminants contained in the waste rock as muck have been a major concern in Japan since the Soil Contamination Countermeasures Law was en...

We applied multiple geochemical tracers (87Sr/86Sr, [Sr], d13C, and d18O) to waters and carbonates of the lower Colorado River system to evaluate its paleohydrology over the past 12 Ma. Modern springs in Grand Canyon reflect mixing of deeply derived (endogenic) fluids with meteoric (epigenic) recharge. Travertine (<1 Ma) and speleothems (2–4 Ma) yield 87Sr/86Sr and d13C and d18O values that ove...

We present a new geometrical method capable of quantifying and illustrating the outcomes three-component mixing dynamics. In scenario, classical algebraic equations endmember analysis (EMMA) can be used to quantify contributions from each fraction. Three-component natural waters, either in an element–element plot or by using EMMA subspace is described triangular shaped distribution sample point...