نتایج جستجو برای: water levels âand rivers

تعداد نتایج: 1435696  

2012
J. O. Odiyo

A study has been conducted to illustrate examples of water quality problems to vulnerable communities in Limpopo Province of South Africa (SA) and management practices and strategies. Pollution of water sources is a major threat to the scarce water resources in the province. This severely affects water quality and impacts negatively on public health particularly in remote rural communities that...

2014
Neerav Kharche Seongmin Kim Timothy B. Boykin Gerhard Klimeck

Journal: :Environmental management 2008
Allison H Roy Seth J Wenger Tim D Fletcher Christopher J Walsh Anthony R Ladson William D Shuster Hale W Thurston Rebekah R Brown

In urban and suburban areas, stormwater runoff is a primary stressor on surface waters. Conventional urban stormwater drainage systems often route runoff directly to streams and rivers, thus exacerbating pollutant inputs and hydrologic disturbance, and resulting in the degradation of ecosystem structure and function. Decentralized stormwater management tools, such as low impact development (LID...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2015
A M G Godoy M L L Sousa

Scarcity of water in the world, virtually, has two sources: the quality and the quantity made available for populations. In the area covered by this study, the selected municipalities from the river basins 3 e 4 of the Paranapanema River and from the basin of the Pirapó River, availability is always greater than the demand and the environmental problems are more often linked to the quality than...

2011
A. Kääb T. Prowse

[1] Knowledge of water‐surface velocities in rivers is useful for understanding a wide range of lotic processes and systems, such as water and ice fluxes and forces, mixing, solute and sediment transport, bed and bank stability, aquatic and riparian ecology, and extreme hydrologic events. In cold regions, river‐ice break up and the associated downstream transport of ice debris is often the most...

2002
Maria Snoussi

The sediment fluxes of the Moulouya and the Sebou Rivers – the two largest rivers in Morocco – were estimated on the basis of suspended sediment loads carried by these rivers towards the coastal zone. The high rate of the specific sediment yield of the Sebou (995 t km year), which is one of the highest in Africa, is probably due to the fact that the drainage basin is characterized by young moun...

2014
Dominika Saniewska Magdalena Bełdowska Jacek Bełdowski Michał Saniewski Marta Szubska Andrzej Romanowski Lucyna Falkowska

In Mediterranean seas and coastal zones, rivers can be the main source of mercury (Hg). Catchment management therefore affects the load of Hg reaching the sea with surface runoff. The major freshwater inflows to the Baltic Sea consist of large rivers. However, their systems are complex and identification of factors affecting the outflow of Hg from its catchments is difficult. For this reason, a...

Journal: :journal of agricultural science and technology 2010
p. c. prabu l. wondimu m. tesso

the physico-chemical parameters, nutrient status and heavy metal ions of huluka and alaltu rivers of ambo, ethiopia were studied. temperature, ph, electrical conductivity, co2 content, total dissolved solids, hardness, dissolved oxygen, ca2+, mg2+, cl-, nitrate, phosphate and sulphate have been determined along with selected heavy metals to assess the various water quality profiles along the ri...

2017
A.K.T. Kirschner G.H. Reischer S. Jakwerth D. Savio S. Ixenmaier E. Toth R. Sommer R.L. Mach R. Linke A. Eiler S. Kolarevic A.H. Farnleitner

The microbial faecal pollution of rivers has wide-ranging impacts on a variety of human activities that rely on appropriate river water quality. Thus, detailed knowledge of the extent and origin of microbial faecal pollution is crucial for watershed management activities to maintain safe water use. In this study, the microbial faecal pollution levels were monitored by standard faecal indicator ...

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