Environmental transitions often result in resource mixtures that overcome limitations to microbial metabolism, resulting in biogeochemical hotspots and moments. Riverine systems, where groundwater mixes with surface water (the hyporheic zone), are spatially complex and temporally dynamic, making development of predictive models challenging. Spatial and temporal variations in hyporheic zone micr...

Iron in groundwater is one of the problems that render the water unsuitable for drinking. The concentration above 0.3 mg/L is common in groundwater. The conventional method of removal is by precipitation under oxic condition. In this study, iron removal under anaerobic conditions was examined by batch experiment as a main purpose. The process involved by purging of groundwater samples with H2S ...

0019-1035/$ see front matter Published by Elsevier doi:10.1016/j.icarus.2010.09.025 ⇑ Corresponding author. Fax: +1 928 556 7014. E-mail address: [email protected] (C.H. Okubo). The value of slope stability analyses for gaining insight into the geologic conditions that would facilitate the growth of gully alcoves on Mars is demonstrated in Gasa crater. Two-dimensional limit equilibrium methods ar...

Nitrate (NO3) contamination of groundwater is a major concern throughout intensive agricultural areas. In the present laboratory scale study, an electrolytic reduction method employing copper cathode and insoluble triple mixed oxide anode was studied for the denitrification of groundwater in a divided cell. Influence of process parameters such as pH, current density and time were studied and th...

excessive withdrawal of groundwater and reduced rainfall in recent years have caused the drawdown of groundwater table. therefore, it is necessary to manage it for preventing its damage. the present study was carried out to investigate the effect of increasing the irrigation efficiency on groundwater fluctuation on ajab-shir plain aquifer. the aquifer was simulated by using visual modflow 3.1 s...

Multiphase ow simulation with various nonhomogeneous boundary conditions in ground water hydrology and petroleum engineering is considered The phase ow equations are given in a fractional ow formulation i e in terms of a saturation and a global pressure It is shown that most commonly used boundary conditions for groundwater hydrology and petroleum engineering problems can be incorporated into t...

Trichloroethylene (TCE), a suspected cancer causing agent and a USEPA priority pollutant, is the most commonly reported volatile organic contaminant of groundwater at hazardous waste sites. The degradation of TCE and other solvents such as benzene and toluene by bacteria commonly found in groundwater environments has been extensively studied, yet the relationship between the rate of degradation...

Received: 22 December 2004 Accepted: 8 March 2005 Published online: 17 June 2005 Springer-Verlag 2005 Abstract Coastal areas of Hong Kong Island are one of the most extensively urbanized areas in the world. Groundwater samples in natural slopes and developed spaces in the regions centered by the MidLevels area, Hong Kong Island, were collected and analyzed to investigate the natural and anthrop...