You will need a web browser that supports tables to read this journal.
On this page you will find the Table of Contents and Abstracts. To see a paper you must select (click on) the title of the paper.
Figures are not displayed when you download a paper to your screen. Instead a link is created to each figure. This is done to save time downloading a paper. To see a figure select (click on) the word "Figure".
This is a link to general information about JEH.
Eduardo J. USUNOFF and Marcelo R. VARNI
Shakeel AHMED, S. SANKARAN, and C.P. GUPTA
P.M. REDDY and N. Subba RAO
X.D. ZHOU and S.C. KOT
Abstract
The City of Azul (Buenos Aires Province, Argentina), as many small cities in the country, is supplied entirely by local groundwater. Such waters contain variable, but generally high concentrations of N-NO3, which hinder their use. This situation, however, has not been addressed, either by local officials or by the affected users. This paper shows that water quality degradation is of man-made origin and affects mainly the urban area where the supply wells are located. Three alternatives directed towards solving or ameliorating the problem are proposed: water treatment, water blending by drilling new wells in nearby, non-polluted zones, and optimization of the current supply system (a battery of 15 wells). The latter solution-posed as a linear optimization problem- is shown to be the least-cost solution because it: (a) does not require additional investments, (b) satisfies the average daily water demand, (c) leads to supply waters carrying at most 45 mg/l of N-NO3 (the maximum allowable concentration set by federal water authorities), and (d) allows for a shut-off time of 6 hours at each pumping well for maintenance purposes.
Abstract
Geostatistical analysis of some of the hydrogeological parameters viz., transmissivity, water level, and depth to the aquifer basement, has been carried out for an aquifer in the Vaippar basin in a weathered hard rock area. The analysis took into account the geological features such as lineaments, which significantly control groundwater movement. Accordingly the study area was divided into a number of zones based on the density of the lineaments visible on an air photo map. The mean as well as zonal variograms for the three parameters were computed and analyzed with respect to variogram parameters sill, range and others. The study reveals that geostatistical analysis of data for an aquifer should be done by dividing the system into a number of zones and hence the estimation before assigning the parameters to each node of the model. It is also seen that anisotropy plays an important role which should not be ignored by assuming the system to be isotropic.
Abstract
Hydrogeoenvironmental studies have been carried out in Gopalapatnam and Mindi, two polluted locations in the Visakhapatnam area. Water samples were collected from dug wells and analyzed for quality studies. The concentrations of TDS, TH, Ca, Mg, Cl SO4, Fe, Mn, Cu, and Cd in the waters of both locations were above the Indian Standards Institution recommended guidelines for for drinking purposes. The pollution is attributed mainly to the industrial effluents. Several health problems were observed in these locations. Environmental protection programs are needed to overcome the health hazards.
Abstract
This paper studies the adsorption characteristics of heavy metal ions onto suspended particles and bottom sediments of the Weiho and Hanjiang Rivers in China. These two rivers are chosen for thier vastly different concentration of suspended matter. Adsorbents are suspended particles and bottom sediments of typical sections of these two rivers. Adsorbates are four heavy metal ions Cd, Zn, Cu, and Pb. Adsorption experiments were used to study effects of environmental factors, such as concentration of sediment, temperature, total ion number, pH value, different sediments, and different heavy metal ions, on the adsorption of heavy metal ions onto sediments. Differences and similarities of adsorption of heavy metal ions onto Weiho and Hanjiang River sediments are compared. Statistical analysis of the adsorption parameter A of heavy metal ions on suspended particles and bottom sediments was also carried out.
Return to HydroWeb Homepage