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A delta is a vast, fan-shaped creation of land, or low-lying plain, formed from successive layers of sediment washed from uplands to the mouth of some rivers, such as the Nile, the Mississippi and the Ganges. The nutrient-rich sediment is deposited by rivers at the point where, or before which, the river flows into the sea. Deltas are formed when rivers supply and deposit sediments more quickly that they can be removed by waves of ocean currents. The importance of deltas was first discovered by prehistoric man, who was attracted to them because of their abundant animal and plant life. Connecting waterways through the deltas later provided natural routes for navigation and trade, and opened up access to the interior. Deltas are highly fertile and often highly populated areas. They would be under serious threat of flooding from any sea-level rise. (Source: WRIGHT)
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Displaying results 451 - 500 of 518 record(s) tagged with this keywordClick/tap on any title to see full details of the record
2004. The distribution of the Tsetse fly in Africa and in Ngamiland and Namibia.
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| Tsetse fly range_2004.zip | 40.08 KB |
2004. A note on how the cattle density for the Okavango basin area is calculated.
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| Note on cattle density in Basin area.xls | 14.5 KB |
2004. Goats per square km in Kavango.
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| Kavango goat density_2004.zip | 80.37 KB |
2004. Cattle density per square km in 2001 in Kavango.
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| Kavango cattle density_2004.zip | 167.5 KB |
2004. Crushpens in Ngamiland.
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| Cattle crushpens-Ngamiland_2004.zip | 14.86 KB |
2004. Percentage of households in Kavango planting different types of Mahangu seeds and reporting different kinds of crop pests between 1996 and 1999.
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| Mahangu seed types_Kavango.xls | 34.5 KB |
2004. Percentage of households in Kavango planting different crops in four zones in 1999.
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| HH planting different crops per zone_Kavango.xls | 19 KB |
2004. Values of different sources of cereal, meat and fish per sample household in Kavango in 1994.
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| Food consumption_Kavango.xls | 198.5 KB |
2004. Assorted figures on crop and livestock farming in Ngamiland.
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| Agricultural Statistics 1968-98_Ngamiland.xls | 299 KB |
2004. Cleared land in Ngamiland.
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| Cleared land-Ngamiland_2004.zip | 545.29 KB |
2004. Cleared land in Kavango in 1996.
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| Cleared land in 1996-Kavango_2004.zip | 2.92 MB |
2004. Cleared land in Kavango in 1972.
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| Cleared land in 1972-Kavango_2004.zip | 1.54 MB |
2004. Cleared land in Kavango in 1943.
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| Cleared land in 1943-Kavango_2004.zip | 110.05 KB |
2004. Number of people per constituency and number of people per household in 2001 in the Kavango region.
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| People per constituency 2001_Kavango.xls | 17 KB |
2004. Number of people per census locality in Ngamiland district in 2001 population census.
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| Population per locality_Ngamiland.xls | 198 KB |
2004. Estimates of the number of people living in the Angolan part of the Okavango basin.
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| Estimates of the number of people living in the Angolan part of the Okavango basin.xls | 19.5 KB |
2004. Number of people in Kavango region in Namibia and Ngamiland district in Botswana 1904-2001, and note on number of people in Cuangar, Mucusso and Dirico.
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| Population data_Kavango _ Ngamiland.xls | 20.5 KB |
2004. Number of people per different localities in Ngamiland district in 1981, 1991 and 2001.
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| Population census 1981_1991_2001-Ngamiland.xls | 114 KB |
2004. Child and infant mortality, fertility rate and life expectancy in the Kavango Region.
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| Demographic rates_ Kavango_2004.xls | 21.5 KB |
2004. Population sizes in Kavango Region 1911-2001, dependancy ratios, number of people per household and gender of the head of household.
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| Demographic indicators_ Kavango.xls | 75 KB |
2004. Population density per square kilometre in the Okavango Basin, approximately in 2001.
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| People density-focal area_2004.zip | 942.02 KB |
2004. Population densities in 1991, Botswana.
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| People density-Botswana_2004.zip | 154.37 KB |
2004. Map of the languages distribution in the Okavango Basin.
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| Languages_2004.zip | 102.06 KB |
2004. Number of people per household, level of education and main occupation of household members, Okavango.
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| Demography from SIAPAC_Ngamiland.xls | 26 KB |
2004. Age and sex structure of the population, and employment and sources of income urban and rural areas in Kavango region in 2001.
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| Population census 2001_Kavango.xls | 40 KB |
2004. Age and sex structure of the population in Ngamiland district, Botswana in 1991.
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| Age pyramids 1991_Ngamiland.xls | 34 KB |
2004. Age and sex structure of the population in Kavango region in 1960, 1970, 1991 and 1999, and numbers of Kavango language speakers inside and outside Kavango.
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| Age pyramids 1960-1999_Kavango.xls | 72 KB |
2004. Monthly wind speed and directions at Rundu.
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| Windspeed_Rundu.xls | 35.5 KB |
2004. Daily minimum and maximum temperatures at Rundu, and for Rundu and Maun average and highest maximums and average and lowest minimums.
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| Daily minimum and maximum temperatures at Rundu.xls | 111.5 KB |
2004. Long-term seasonal rainfall totals for Maun, Shakawe, Andara and Rundu.
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| Rainfall seasonal totals.xls | 54 KB |
2004. Monthly rainfall averages and monthly totals per year for selected stations in Kavango.
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| Rainfall monthly totals.xls | 863.5 KB |
2004. Daily rainfall records for selected stations in Kavango.
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| Daily rainfall records for selected stations in Kavango.xls | 631.5 KB |
2004. Average annual seasonal rainfall at 413 rainfall stations in Angola, Botswana, Namibia and South Africa.
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| Average rainfall per station_2004.zip | 21.22 KB |
2004. Monthly rainfall records at 23 stations across the Okavango Basin.
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| Rainfall histograms_2004.zip | 3.31 KB |
2004. Average annual seasonal rainfall across the Okavango Basin.
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| Average rainfall zones_2004.zip | 12.59 KB |
2004. Co-efficient of variation of rainfall across the Okavango Basin.
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| Rainfall variance_2004.zip | 3.32 KB |
2004. Boundaries of the 13 regions of Namibia.
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| Namibia regions 2004.zip | 404.98 KB |
2004. Boundaries of the Kavango Region, Namibia.
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| Kavango region_2004.zip | 13.66 KB |
2004. 18 Administrative provinces of Angola.
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| Angola provinces_2004.zip | 88.05 KB |
2004. International boundaries in Africa and southern Africa.
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| Africa_Southern Africa_2004.zip | 138.4 KB |
2004. A one-degree grid around the Okavango.
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| Okavango basin grid_2004.zip | 4.63 KB |
2004. Okavango basin catchment.
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| Okavango basin focal area_2004.zip | 12.43 KB |
2004. Boundaries of Ngamiland District, Botswana.
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| Ngamiland district 2004.zip | 30.41 KB |
2004. Administrative districts of Botswana.
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| Botswana districts_2004.zip | 310.64 KB |
2004. Angolan municipalities, equivalent to districts or sub-provinces.
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| Angola districts_2004.zip | 192.9 KB |
2004. Boundaries of the 9 constituencies of Kavango.
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| Kavango constituencies_2004.zip | 20.14 KB |
1998. The contribution of aerosol- and water-borne nutrients to the functioning of the Okavango Delta ecosystem, Botswana. South African Journal of Geology
101 (2) 101 - 117
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| The_contribution_of_aerosol-and_water_-borne_Nutrients_to_the_functioning_of_the_Okavango_Delta_Ecosystem,_Botswana_by_M._Garstag.......pdf | 545.43 KB |
1973. Some natural and man-made changes in the channel of the Okavango Delta. Botswana Notes and Records
5 132 - 153
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| Some_Natural_and_Man-Made_Changes_in_the_Channels_of_the_Okavangos_Delta.pdf | 2.48 MB |