Monitoring Spit Development In Pomene,
Southern Mozambique, Using Landsat Data
Author(s)
E. A. Massuanganhe & W. Arnberg
Abstract
Coastal dunes, estuary, mangrove, and sand beach outlining a spit characterize
Pomene on the southern coast of Mozambique. The spit is of interest for tourists
and susceptible to coastal processes. Thus, four Landsat TM/ETM+ images dated
1984, 1989, 2001 and 2007 were used to monitor the geomorphologic change as
well as to find the pattern of spit development spatially and temporally. From
each Landsat image we extracted land and water (outlining the spit) by grouping
30 spectral classes from unsupervised ISO DATA classification using red, nearinfrared
(NIR) and short-wavelength infrared (SWIR) spectral bands.
Geographic Information System (GIS) software was used to process and present
the final maps. Cross-classification was carried out to show the spatial difference
between the dates. The results show a growth of the spit towards NNW and
erosion at the Indian Ocean side, suggesting a longshore drift process in this
area. The spit is becoming narrow and threatening its shape in the short term.
The longshore currents caused by prevailing SSE winds, and offshore winds, are
the main causes of the spit development.
Keywords: monitoring spit, coastal erosion, shoreline, southern Mozambique,
coastal processes, estuary, Pomene.
1 Introduction
Located in Southern Mozambique, Pomene is known for its long beaches
attracting tourists to the area bringing income to the country and to the people
living nearby. Like many places in the Mozambican coastal zone, Pomene faces
Keywords
monitoring spit, coastal erosion, shoreline, southern Mozambique,
coastal processes, estuary, Pomene.
Related Book
Other papers in this volume
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