Effects Of Shoreline Change On Sandy Beach Environments Of Malindi -Mambrui area, northern Kenyan Coast.
The Malindi-Mambrui shoreline in northern Kenya coast is of delicate coastal type. In Kenya, coastal zone development in the last 30 years has not appreciated the problem of coastal accretion at Malindi-Mambrui. At Malindi-Mambrui area sediment accretion, is a major cause of management concern. Beach hotels and dwellings constructed in the coastal zone are now distant from the shore by some 500 meters since 1990. A study carried out from August to November 2001 attempted to calculate rates of shoreline change within the study area using desk study and aerial photographs. The overall objective of the study was to gather information and propose management options to control coastal accretion in the Malindi-Mambrui area. Using desk study, ground truthing and aerial photographs, the study areas was assessed for the potential for accretion between the various facies of the coast and its degree or severity. Extent of accretion was interpreted from aerial photographs. The Sabaki river discharge has considerably increased from 1.3 x 109 m3y(1 in 1983 to 2.3 x 109 m3y(1 in 2002 and the terrigenous sediment load have dominated the development of the coast by spreading southwards providing active accumulation of sand which is now being used for development. At Mambrui the coastal settlement is threatened by mobile sands which have already caused seven water bore holes, a dozen houses, a mosque, a health centre and customs offices to be abandoned. This paper attempts to bring out the options available to Kenya to respond to these threats of accretion.
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| Format: | Report biblioteca |
| Language: | English |
| Published: |
Kenya Marine and Fisheries Research Institute
2003
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| Subjects: | Coastal landforms, Integrated coastal zone management, Sedimentation, Shore protection, Beach accretion, |
| Online Access: | http://hdl.handle.net/1834/7308 |
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| Summary: | The Malindi-Mambrui shoreline in northern Kenya coast is of delicate coastal type. In Kenya, coastal zone development in the last 30 years has not appreciated the problem of coastal accretion at Malindi-Mambrui. At Malindi-Mambrui area sediment accretion, is a major cause of management concern. Beach hotels and dwellings constructed in the coastal zone are now distant from the shore by some 500 meters since 1990. A study carried out from August to November 2001 attempted to calculate rates of shoreline change within the study area using desk study and aerial photographs. The overall objective of the study was to gather information and propose management options to control coastal accretion in the Malindi-Mambrui area. Using desk study, ground truthing and aerial photographs, the study areas was assessed for the potential for accretion between the various facies of the coast and its degree or severity. Extent of accretion was interpreted from aerial photographs. The Sabaki river discharge has considerably increased from 1.3 x 109 m3y(1 in 1983 to 2.3 x 109 m3y(1 in 2002 and the terrigenous sediment load have dominated the development of the coast by spreading southwards providing active accumulation of sand which is now being used for development. At Mambrui the coastal settlement is threatened by mobile sands which have already caused seven water bore holes, a dozen houses, a mosque, a health centre and customs offices to be abandoned. This paper attempts to bring out the options available to Kenya to respond to these threats of accretion. |
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