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Tag: River

Fragmentation pf the Volga river over the last 60 years
The construction of several dams along spawning rivers (mainly the Volga River) significantly altered water flows and destroyed about 90 per cent of the sturgeon’s spawning grounds (UNEP/GRID-Arendal 2006).
17 Oct 2013 - by GRID-Arendal
Freshwater availability per capita in Zambezi River Basin countries
The water flow in the Zambezi river is estimated at 3 600 cu m per second. This represents about 87 mm/year of equivalent rainfall and less than 10 per cent of the average rainfall in the basin (Shela 2000). The average...
14 Oct 2013 - by GRID-Arendal
Urban Population in Zambezi River Basin States
Zambezi River Basin countries share similar settlement patterns characterized by both low and high densities. While the basin is largely rural, urbanization rates are high. In Botswana and Angola, urban population consti...
14 Oct 2013 - by GRID-Arendal
Zambezi River runoff
A major impact of the construction of the Kariba and Cahora Bassa dams from 1950–1970 was the reduction in the Zambezi River runoff. Before the dam construction, the Zambezi River was torrential with high flows during t...
14 Oct 2013 - by GRID-Arendal
Population distribution in the Zambezi River Basin
Population distribution is uneven in the basin, with large areas uninhabited and reserved for wildlife. In 1998, the average population density in the basin was 24 people per sq km, and this increased to 28.75 people per...
14 Oct 2013 - by GRID-Arendal
Popoulation density increasing, per capita land area shrinking in Zambezi River Basin
The population of the Zambezi River Basin grew from 31.7 million in 1998 to 38.4 million in 2005, before reaching 40 million in 2008. It is projected that by 2025 the population will reach 51 million (Chenje 2000; SADC a...
14 Oct 2013 - by GRID-Arendal
Forest cover in Zambezi basin countries
Zambezi River Basin countries have been losing forests over the decades, and this loss continues unabated. Rates of forest loss per year in the last 20 years have been significant with Tanzania, Zimbabwe and Mozambique r...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin flood areas
Over the last two decades, the Zambezi River Basin has experienced extreme floods and droughts (SARDC and HBS 2010). Most of the flooding in the basin is associated with active cyclones that develop in the Indian Ocean. ...
14 Oct 2013 - by GRID-Arendal
Threatened Species in the Zambezi River Basin countries
Despite the abundance of wildlife resources in the basin, there are pressures that threaten the existence of this resource. Species that have become extinct in the basin in recent times include the blue wildebeest in Mal...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin wetlands
Wetlands cover a large area of the Zambezi River Basin. For example, in Zambia the Kafue Flats, Lukanga swamps, Barotse flood plains, Nyambomba swamps, Cuando, Busanga,Luangwa and Luena flats cover an area greater than 2...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin vegetation
Land cover and land use have great impacts on water resources, as they affect how precipitation translates into runoff, infiltration, evaporation, and the quality of the water (Hirji et al. 2002). Almost 75 per cent of ...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin average temperature
The temperature across the river basin varies according to elevation and, to a much lesser extent, latitude. Mean monthly temperatures for the coldest month, July, vary from below 13°C for higher elevation areas in the s...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin
The Zambezi River Basin is located between 8–20° S latitude and 16.5–36° E longitude in southern Africa (Chenje 2000). It drains an area of almost 1.4 million square kilometres, stretching across 8 of the 15 member state...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin average rainfall
Average annual rainfall across the river basin varies from 500mm in the extreme south and southwest part of the basin to more than 1 400 mm in the Upper Zambezi and Kabompo sub-basins, in the north-eastern shores of Lake...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin hydropower facilities
The hydropower potential of the Zambezi River Basin is estimated at 20 000 megawatts (MW)of which about 5 000 MW has been developed (Tumbare 2004). More than half of this potential is in Mozambique, about one-quarter in...
14 Oct 2013 - by GRID-Arendal
Zambezi River Basin share by country
The Zambezi River Basin has 13 sub-basins, most of which are transboundary. The largest portion of the basin lies in Zambia, with smaller segments in Angola, Zimbabwe, Mozambique and Malawi in that order. Tanzania, Botsw...
14 Oct 2013 - by GRID-Arendal
Renewable water resources in Europe
Water resources are a major political issure with most European countries a large portion of their fresh water supply orginating from other countries. Hungary has over 90 percent of its fresh water coming from river flow...
14 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Renewable water resources in Europe
Water resources are a major political issure with most European countries a large portion of their fresh water supply orginating from other countries. Hungary has over 90 percent of its fresh water coming from river flow...
14 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Freshwater resources
Access to water is perhaps one of the greatest challenges for sustainable development in Africa. This resource includes three graphics. The first shows the average annual freshwater withdrawal, in cubic metres per capita...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Freshwater resources
Access to water is perhaps one of the greatest challenges for sustainable development in Africa. This resource includes three graphics. The first shows the average annual freshwater withdrawal, in cubic metres per capita...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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