Tidal inundation mapping under enhanced land subsidence in Semarang, Central Java Indonesia

Muh Marfai () and Lorenz King

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2008, vol. 44, issue 1, 93-109

Abstract: Tidal inundation by high tide under enhanced land subsidence is a damaging phenomenon and a major threat to the Semarang urban area in Indonesia. It impacts on economic activities, as well as the cost of an emergency program and causes interruption of pubic services, danger of infectious diseases and injury to human lives. This study examines a spatial analysis tool on the GIS-raster system for the tidal inundation mapping based on the subsidence-benchmark data and modified detail digital elevation model. Neighborhood operation and iteration model as a spatial analysis tool have been applied in order to calculate the encroachment of the tidal inundation on the coastal area. The resulting map shows that the tidal flood spreads to the lowland area and causes the inundation of coastal settlement, infrastructure, as well as productive agricultural land, i.e., the fish-pond area. The monitoring of the vulnerable area due to the tidal inundation under the scenario of extended land subsidence plays an important role in long-term coastal zone management in Semarang. Copyright Springer Science+Business Media B.V. 2008

Keywords: Land subsidence; Tidal inundation; Neighborhood operation and iteration; Semarang; Indonesia (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1007/s11069-007-9144-z

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