dc.contributor.author | Alemayehu, Fikir | |
dc.contributor.author | Onwonga, Richard | |
dc.contributor.author | Mwangi, James K | |
dc.contributor.author | Wasonga, Oliver. V | |
dc.date.accessioned | 2015-06-25T07:43:00Z | |
dc.date.available | 2015-06-25T07:43:00Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Alemayehu, O. R., & Kinyanjui, M. J. (2015). Assessment of Shoreline Changes in the Period 1969-2010 in Watamuarea, Kenya. Global Journal of Science Frontier Research, 14(6). | en_US |
dc.identifier.uri | http://journalofscience.org/index.php/GJSFR/article/view/1448 | |
dc.identifier.uri | http://hdl.handle.net/11295/85641 | |
dc.description.abstract | Watamu coastlineis a major attraction site for tourist
and also a source of income for the local people. However, the
shoreline has been changing due to erosion. This study
sought to find the trend of shoreline changes, and the factors
attributed to the changes. Aerial photographs of 1969 and
1989 and a recent satellite image of 2010 were used to digitize
the shoreline.The Digital Shoreline Analysis System (DSAS) in
ArcGIS environment was used to create transects and
statistical analyses for the shoreline.Several GPS points were
taken in October 2013 and 2014 during ground truthing
following the High Water Mark (HWM). The 9.8 km long
Watamu shoreline was divided in-to 245 transects with 40
meter spacing in order to calculate the change rates. The rates
of shoreline change were calculated using the End Point Rate
(EPR), Net Shoreline Movement (NSM), and Weighted Linear
Regression (WLR) statistic in DSAS. In addition, Focused
Group Discussion (FGD)and key informants interview were
conducted with curio sellers, boat operators, fishermen, safari
sellers, and longtime residents and hoteliers in order to get
information about the drivers of shoreline change.The analysis
from WLR indicated a mean of -0.89 m/year where 69.7% of
transects fall under erosion and 30.2% accretion. The result
from EPR and NSM revealed mean shoreline change of -
0.7m/year and -30.3m/period respectively from1969 to
2010 with negative signs indicating erosion. Both EPR and
NSM results showed out of 245 transects 158 or 64.4%
experienced erosion and 87 transects or 35.5% accretion in
the 41 year study period.Shoreline erosion was mainly
attributed to anthropogenic factors. These include construction
near the High Water Mark, defensive structures and sea walls,
and destruction of vegetation along the beach. Therefore, it
will be advantageous if all institutions and stakeholders with
responsibilities for such coastal areas to work in collaboration
so as to keep the coastline and its marine life and resources
from further damage and erosion. | en_US |
dc.language.iso | en | en_US |
dc.publisher | University of Nairobi | en_US |
dc.subject | analysis system, satellite image, shoreline erosion, watamu, kenya. | en_US |
dc.title | Assessment of Shoreline Changes in the Period 1969-2010 in Watamuarea, Kenya | en_US |
dc.type | Article | en_US |
dc.type.material | en_US | en_US |