Assessment of Shoreline and Associated Landuse/Land cover Changes along Part of Lagos Coastline, Nigeria

• Autorzy: Akinluyi F. O. , Adebola A. O. , Adeseko A. A.

Identyfikatory

DOI

10.2478/ctg-2018-0004

• Języki publikacji: EN

Abstrakty

EN

The city of Lagos, Nigeria has undergone rapid increase in population due to economic and commercial activities. As a result of this, there has been a persistent change in Land use/Land cover (LULC) of the city and shoreline through the years. This observation necessitated the use of multi-temporal satellite data to characterize shoreline changes between 1984 and 2016. Therefore, the study attempts to determine the shoreline change during the study period and the coastal land use and land cover (LULC) of the study area. Satellite data was acquired and subjected to some image processing techniques such as image enhancement, supervised classification, and shoreline extraction. The digital shoreline analysis system (DSAS) in ArcGIS environment was utilized to cast transects and calculate statistical parameters for the shoreline and spatial data used was Landsat TM, ETM and OLI for the years 1984, 1990, 2000, 2004 and 2016 respectively. The results indicate that LULC changes in built-up areas increases rapidly during the years (1984-2015) from 12.2 -36.2%, water bodies increased from (1984-1990-2000) from 52%, 54%, 52% and reduces to 47.4% in the year 2015 while vegetation cover reduces drastically through the year range from 36%, 33%, 29%, 24% and 16%. A total of 1034 transects were generated with 100m spacing and the average rate of change was calculated for the 32 year period (1984-2016). The linear regression rate (LRR) shoreline result shows a mean of -0.59m/year where 73.1% of transect fall under erosion and 61.8% accretion respectively. The end point rate (EPR) and net shoreline movement (NSM) analysis revealed mean shoreline change of -0.57m/year and -18.1m/period respectively from 1984-2016. The EPR and NSM results both revealed that 231 transect or 22.3% experienced erosion, and 805 transect or 77.9% with accretion. It was observed that significant accretion rate recorded along most sections of the shorelines is attributed to beach nourishment activities.

Słowa kluczowe

EN

shoreline changes; Land use; Land cover; LULC; accretion; erosion; Lagos

PL

linia brzegowa; zmiany; pokrycie terenu; użytkowanie terenu; erozja; Lagos; Nigeria

• Wydawca: De Gruyter
• Czasopismo: Contemporary Trends in Geoscience
• Rocznik: 2018
• Tom: Vol. 7, iss. 1
• Strony: 59--71
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Akinluyi F. O.

• Department of Remote Sensing and GIS, Federal University of Technology Akure, Ondo State, Nigeria

autor

Adebola A. O.

• Department of Remote Sensing and GIS, Federal University of Technology Akure, Ondo State, Nigeria

autor

Adeseko A. A.

• Department of Remote Sensing and GIS, Federal University of Technology Akure, Ondo State, Nigeria

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).