Artikkelit jotka sisältää sanan 'water pollution'

Hala Rifaat. Tiivistelmä.
English title: Bacterial Quality of River Nile Water at Cairo Region in Egypt.
Avainsanat: water pollution; Bacteria; taxonomy; coliform
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The aim of is study was to elucidate the bacterial quality of the River Nile water at Cairo region in Egypt. The microorganisms such as heterotrophic bacteria and faecal coliforms were examined. The bacterial isolates were identified using different keys of identification and Biolog metabolic fingerprint system. The results showed the presence of different genera of microorganisms, which were. Alcaligenes, Escherichia, Aeromonas, Pseudomonas, Klebsiella, Enterobacter, Rahnella, Xanthobacter, Streptomyces, Rhodococcus and Arthrobacter. The significance of the results was shortly discussed.
  • Rifaat, Microbial Chemistry Department, National Research Centre, Cairo, Egypt Sähköposti: ei.tietoa@nn.oo (sähköposti)
Tapani Sallantaus, Harri Vasander, Jukka Laine. Metsätalouden vesistöhaittojen torjuminen ojitetuista soista muodostettujen puskurivyöhykkeiden avulla.
English title: Prevention of detrimental impacts of forestry operations on water bodies using buffer zones created from drained peatlands.
Avainsanat: peatland drainage; load; restoration; water pollution
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Before large-scale drainage, the outflowing water from forests was naturally filtered through peatlands. The even topography, dense moss cover and the favourable physical, chemical and biological properties of surface peat facilitate versatile buffering functions in these systems. In addition to retaining suspended solids, peatlands may act as traps for nutrients or harmful metals. Major part of these buffering systems have been lost as a result of forestry drainage. Restoring drained peatlands, being potentially well suited to act as a buffer zone between forestry land and a watercourse, is the major reason for rewetting outside nature reserves. Potentially each drainage area should include a restored part through which waters both from the drainage area itself and from the surrounding upland forest catchment would be filtered. Preliminary results from three experimental catchments show that buffer zones restored from drained peatlands may be succesfully used in decreasing the detrimental impacts forestry operations may have on adjacent water courses. Long-term monitoring is, however, required for the quantitative assessment of the buffer efficiency.
  • Sallantaus, Pirkanmaa Regional Environment Centre, P.O.Box 297, FIN-33101 Tampere, Finland Sähköposti: ei.tietoa@nn.oo (sähköposti)
  • Vasander, Sähköposti: ei.tietoa@nn.oo
  • Laine, Sähköposti: ei.tietoa@nn.oo
Mohamed M. El Bouraie, Eman A. Motawea, Gehad G. Mohamed, Mohamed M. Yehia. Jokiveden laatu Rosettan haarassa Niilin suistossa Egyptissä.
English title: Water quality of Rosetta branch in Nile delta, Egypt.
Original keywords: jokivesi; virtaama; kuormitus; El-Rahawy
English keywords: water pollution; river water; stream flow; El-Rahawy drain
Tiivistelmä | Näytä lisätiedot | Artikkeli PDF-muodossa | Tekijät
Rosetta branch is one of the two main branches in Nile delta and El-Rahawy drain is one of this main sources, which outlet on the branch. It is subjected to many sources of pollutions from municipalities, agriculture and industry, but only little information is available on the quality of river water. The aim of this study was to analyze the river water quality in Rosetta branch at the outlet of El-Rahawy drain, Nile delta. Water samples were collected seasonally from El-Rahawy and Rosetta branch and the following physicochemical parameters were analyzed: hydrogen ion concentration (pH), total dissolved solids (TDS), electrical conductivity (EC), dissolved oxygen (DO), ammonia (NH3), total alkalinity (CO3+HCO3); biochemical oxygen demand (BOD) and chemical oxygen demand (COD). The results were compared with the water quality standards of Egypt (Law 48/1982), FAO and Canadian Water Quality standards (CWQGs). Statistical studies were carried out by calculating correlation coefficients between different parameters. The large transports of NH3, and TDS with low COD, BOD and DO values along El-Rahawy drain were seriously deteriorating the water quality in the downstream of Rosetta branch, especially during the low flow condition in winter.
  • El Bouraie, Mohamed M. El Bouraie, Central Laboratory for Environmental Quality Monitoring (CLEQM), National Water Research Center (NWRC), Cairo, Egypt, email: Sähköposti: ei.tietoa@nn.oo (sähköposti)
  • Motawea, Sähköposti: ei.tietoa@nn.oo
  • Mohamed, Sähköposti: ei.tietoa@nn.oo
  • Yehia, Sähköposti: ei.tietoa@nn.oo

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