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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 401 - 450 of 509 record(s) tagged with this keywordClick/tap on any title to see full details of the record
2005. The drainage of Africa since the Cretaceous. Geomorphology
67 437 - 456
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| The drainage of Africa since the Cretaceous_2005.pdf | 1.37 MB |
2004. Numbers of animals of different species in the Okavango Delta during the dry and wet seasons of 1992, 1994, 1996 (only dry season), 1999 and 2001.
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| Delta wildlife populations.xls | 20.5 KB |
2004. Monthly water volume in millions of cubic metres recorded at Mohembo 1933-2002.
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| Water monthly flow at Mohembo1933-2002.xls | 33.5 KB |
2004. Water levels and estimates of discharge on the Thamalakane River at Maun.
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| Water discharge at Maun1968-2001.xls | 621 KB |
2004. Volume of water carried by the Okavango and the Cuito every year 1933-2002.
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| Water annual volume for all stations.xls | 61 KB |
2004. Perennial rivers of the Okavango river system.
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| Okavango perennial rivers_2004.zip | 244.15 KB |
2004. Wetland habitats between Mohembo and Katwitwi, Kavango.
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| Okavango habitats-Namibia_2004.zip | 1.62 MB |
2004. Rivers and major tributaries of the Okavango river system.
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| Okavango drainag_2004.zip | 563.46 KB |
2004. Okavango river catchment and sub-catchment areas.
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| Okavango catchments_2004.zip | 31.02 KB |
2004. Approximate positions of existing and proposed schemes to extract water from the Okavango river.
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| Water extraction_2004.zip | 2.33 KB |
2004. Approximate limits of Makgadikgadi pans, Mababe Depression and Ngami Lake.
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| Makgadikgadi pans.zip | 28.23 KB |
2004. Summary report and maps on the geohydrology of Kavango.
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| Hydrogeology from Bittner_Kavango.doc | 166.5 KB |
2004. Interpolated levels of groundwater below ground in the Kavango.
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| Groundwater level-Kavango_2004.zip | 46.21 KB |
2004. Average yields from boreholes, Kavango.
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| Groundwater yield-Kavango.zip | 67.58 KB |
2004. Total dissolved solids in milligrams per litre, in Kavango.
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| Groundwater tds-Kavango_2004.zip | 62.82 KB |
2004. Approximate boundaries of zones characterized by different underground water flow directions, Okavango.
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| Flow system-Kavango.zip | 2.02 KB |
2004. Sulphate concentration in groundwater in Kavango.
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| Borehole so4-Kavango_2004.zip | 27.03 KB |
2004. Pieziometric levels of groundwater in Kavango.
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| Borehole pl-Kavango_2004.zip | 42.73 KB |
2004. Nitrate concentration in groundwater in Kavango.
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| Borehole no3-Kavango_2004.zip | 20.58 KB |
2004. Chemistry data for water samples for about 600 boreholes in Kavango.
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| Borehole chemistry-Kavango_2004.zip | 43.47 KB |
2004. Data from a survey of 651 water points in Kavango conducted in 2001, Kavango.
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| Boreholes from Luxdev-Kavango_2004.zip | 42.02 KB |
2004. Extent of flooding in July/August 1995 and 2001, Okavango.
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| Delta Annual floods1995_2001_2004.zip | 1.17 MB |
2004. Remote sensing for detection of landscape form and function of the Okavango Delta.
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| Delta average monthly floods_2004.zip | 897.59 KB |
2004. Permanent and seasonal swamps of the Okavango delta.
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| Delta wetlands_2004.zip | 34.58 KB |
2004. Major distributary channels in the Okavango Delta.
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| Delta rivers_2004.zip | 133.98 KB |
2004. Smoothed interpolation of elevation points in the 1:50,000 Map series for Kavango 1972.
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| Kavango relief_2004.zip | 35.43 KB |
2004. Interpolation of the GOTOPO 1-km interval grid data set of spot elevations, Okavango. Basin elevation.
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| Basin elevation_2004.zip | 16.14 KB |
2004. Interpolation of the GOTOPO 1-km interval grid data set of spot elevations, Okavango. African elevations.
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| African elevations_2004.zip | 216.24 KB |
2004. Kalahari age sediments, Okavango.
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| Kalahari basin deposits_2004.zip | 679.77 KB |
2004. Simplification of geological features in the Okavango Basin.
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| Basin geology-new_2004.zip | 418.74 KB |
2004. Approximate positions of faults around the Okavango Delta.
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| Geological faults.zip | 1.72 KB |
2004. Approximate boundaries of old fluvial sediments, Okavango.
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| Old fluvial sediments.zip | 4.34 KB |
2004. Boundaries of the commercial farms in Ngamiland.
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| Commercial ranch-Ngamiland_2004.zip | 5.92 KB |
2004. Household size and average number of cattle and goats in Kavango.
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| Livestock ownership_Kavango.xls | 1.79 MB |
2004. Number of livestock in Kavango Region, 1980-2001.
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| Livestock numbers1980-2001_Kavango.xls | 29 KB |
2004. Number of livestock in Ngamiland, Botswana 1955-2002.
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| Livestock numbers1955-2002_Ngamiland.xls | 15.5 KB |
2004. Notes and figures on livestock diseases in Kavango Region.
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| Livestock diseases from schneider_Kavango.xls | 25 KB |
2004. Households having different numbers of cattle and goats in Ngamiland.
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| HH having different no of cattle_goats.xls | 19 KB |
2004. Number of cattle in relation to the number of people 1951 to 2001 in Kavango.
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| Cattle-people ratio_Kavango.xls | 13.5 KB |
2004. The number of cattle bought by MEATCO in the Kavango Region in1992-2002.
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| Cattle bought by Meatco 92-02_Kavango.xls | 15.5 KB |
2004. The relation between the number of cattle owned by a household and the number of hectare cultivated in Ngamiland.
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| Cattle and field sizes_Ngamiland.xls | 18 KB |
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 |