Koyra (Khulna District) is the coastal Upazila of Bangladesh and very susceptible to salinity intrusion. The surface shallow tube well water in naturally saline. quality subterranean deliberate area hardly presented for different Unions Koyra. Dakshin Bedkashi Union saline prone. Therefore, groundwater chemistry was determined legalize if fit drinking irrigation or not. Spatially dispersed 30 s...

Aquitards are capable of generating and preserving large amounts of chemicals. The release of the chemicals from the aquitards poses a potential contamination risk to groundwater that may be used as a drinking water source. This work aimed to identify the contribution of hydrogeochemical processes in the aquitards to groundwater hydrochemistry in the underlying confined basal aquifer by studyin...

Forests are critical water supply regions that increasingly threatened by natural and anthropogenic disturbance. Evaluation of runoff-generating processes within harvested undisturbed headwater catchments provides insight into disturbance impacts on quality drinking treatability. In this study, an extensive hydrologic dataset collected at the experimental Turkey Lakes Watershed (TLW) located Ca...

The natural acidification of groundwater in some types of environment has accelerated by acid atmospheric emissions and cultivation during the last 200 years. The direct effects are seen in changes of the groundwater chemistry in four stages, (1) seasonal depression of pH, alkalinity and some cations in very shallow groundwater, (2) long-term increase of calcium, magnesium, nitrate and sulphate...

INTRODUCTION Grand Traverse Bay and the Grand Traverse Bay Watershed (GTBW) are important natural and economic resources for Michigan and the Great Lakes Region, due to their great scenic beauty, quality of waters, and the recreational opportunities these afford. However, the watershed is currently undergoing some of the most rapid population growth and land-use change of any region in the Grea...

The exchange of groundwater between land and sea is a major component of the hydrological cycle. This exchange, called submarine groundwater discharge (SGD), is comprised of terrestrial water mixed with sea water that has infiltrated coastal aquifers. The composition of SGD differs from that predicted by simple mixing because biogeochemical reactions in the aquifer modify its chemistry. To emph...

Understanding interactions between permanently frozen soils and stream chemistry is important in predicting the effects of management, natural disturbance and changing permafrost distribution on stream ecosystems and nutrient budgets in subarctic watersheds. Chemical measurements of groundwater, soil water and stream water were made in two watersheds in the taiga of interior Alaska. One watersh...

Hong Kong developed rapidly from a small fishing village with few thousands of people to a highly urbanized modern city with population over 6.7 millions from 1841 to the present. This development provides a unique opportunity to study the impacts of urbanization on the environment. Many routine monitoring programs on air, noise, surface water, solid waste, and radiation have been conducted in ...

Changes in the chemistry of bulk precipitation and stream water between 1982 and 2000 are described for small moorland and forest catchments located within Beddgelert Forest in north Wales. Two forest catchments were partially clearfelled in 1984 (D2; 68% and D4; 28%) whilst a third (D3) remained as an unfelled control until autumn / winter 1998/99 when partial felling took place in the headwat...