background: rivers and streams are important sources of surface waters. water quality of these resources depends on many factors including hydrologic, physicochemical and biological factors. these resources are important in terms of social, economic and political development.. zayanderood river is the only river in central basin of iran that has permanent fresh water. this river has an importan...

the problems of shortages and quality deterioration of water, have led to an increased interest in the reuse of treated grey water in many parts of the world. this study examined the suitability of locally available materials (beach sand, oyster shells, and charcoal) to treat grey water samples collected weekly from three halls of residence (unity hall, africa hall, and independence hall) on kw...

The rapid development of industrialization and urbanization in the world impact increased water pollution. Human activities, such as dam constructions, excessive consumption, severance river flows, compaction riverbanks, use riverbed vegetation, disrupt flow alter original hydrological cycle. In response to these conditions, this study aims analyze quality status set up a watershed environmenta...

Abstract Based on weekly sampling, the present short-term study was set out over a one-year cycle in Eastern Harbor (Alexandria, Egypt). This aims to assess water quality monitoring data. Among 13 indexes used define harbor, 6 depend physical and chemical variables, other are biological criteria. Chlorophyll concentrations phytoplankton cell numbers were also as indicators for assessing trophic...

The European Water Framework Directive has a high impact on current water management in Belgium. Several restoration scenarios have been worked out by the government. To compare the effect of these scenarios, a combination of a water quality (PEGASE) and ecological assessment models (data driven models based on regression trees) has been developed and applied for the major part of the large riv...

Many regulatory authorities set water quality objectives or thresholds based on nutrient concentrations to safeguard aquatic ecosystem health. But do these criteria adequately assess the biological and ecological status? Our research has been focussing on the performance of constructed wetlands for water quality improvement and ecosystem health. In this paper we present data on macroinvertebrat...

Two of the key objectives of the European Water Framework Directive (WFD) are: 1) to protect and enhance the status of aquatic ecosystems (and terrestrial ecosystems and wetlands directly dependent on aquatic ecosystems) and 2) to provide for sufficient supply of good quality surface water and groundwater as needed for sustainable, balanced and equitable water use. These requirements, together ...

drinking water quality can be deteriorated by microbial and toxic chemicals during transport, storage and handling before using by the consumer. this study was conducted to evaluate the microbial and physicochemical quality of drinking water from bottled water coolers.a total of 64 water samples, over a 5-month period in 2012-2013, were collected from free standing bottled water coolers and wat...