In recent studies, the effects of complex costal topography on tsunami run-up has sparked heated discussion. This study mainly aims at investigating the effects of complex costal topography on the tsunami inundation d...In recent studies, the effects of complex costal topography on tsunami run-up has sparked heated discussion. This study mainly aims at investigating the effects of complex costal topography on the tsunami inundation distance and the effectiveness of sand dunes in dissipating tsunami wave energy. The experiments were carried out in a wave flume to investigate the potential reduction effects of wave run-up by non erodible sand dune like features. The results show that increasing dunes spacing could not significantly affect inundation distance. However, if the height of sand dunes is of the same order of magnitude as the incoming tsunami wave and the gaps between the dunes are large enough, successful tsunami mitigation could also be possible.展开更多
The Poso Depression provides a record of Plio-Pleistocene environments and palaeogeography of Central Sulawesi.Outcrop-based sedimentological and provenance studies suggest that during the Pliocene the Poso Depression...The Poso Depression provides a record of Plio-Pleistocene environments and palaeogeography of Central Sulawesi.Outcrop-based sedimentological and provenance studies suggest that during the Pliocene the Poso Depression was a sea channel connecting Gorontalo and Bone bays formed in an asymmetric half-graben.The Pliocene history began with deposition of the Puna Formation with fan deltas at the eastern basin margin and channel complexes in the deep-water basin further east.Analyses of light and heavy minerals indicate the main sediment source was ultrabasic rocks in East Sulawesi with minor and intermittent magmatic and metamorphic input from West Sulawesi.Later,in the Middle to Late Pliocene,carbonates of the Poso Formation accumulated on the eastern basin margin.They are unconformably overlain by shallow marine glaucophane-rich siliciclastics of the Pleistocene Lage Formation that are associated with the rapid exhu-mation and uplift of the Pompangeo metamorphic complex.This uplift led to the development of a land bridge connecting western and eastern Sulawesi.The terrane evolution favoured increasing the area of exposed land due to rapid tectonic uplift,which when combined with the tropical climate,contributed to faunal speciation and dispersal in Sulawesi.展开更多
基金新加坡国家研究基金会(the National Research FoundationSingapore)颁发给Adam D.Switzer博士的NRF研究项目(编号:NRF-RF2010-04)厦门大学近海海洋环境科学国家重点实验室授予余凤玲博士的青年访问学者野外经费(批准号:2010-2012)共同资助
文摘In recent studies, the effects of complex costal topography on tsunami run-up has sparked heated discussion. This study mainly aims at investigating the effects of complex costal topography on the tsunami inundation distance and the effectiveness of sand dunes in dissipating tsunami wave energy. The experiments were carried out in a wave flume to investigate the potential reduction effects of wave run-up by non erodible sand dune like features. The results show that increasing dunes spacing could not significantly affect inundation distance. However, if the height of sand dunes is of the same order of magnitude as the incoming tsunami wave and the gaps between the dunes are large enough, successful tsunami mitigation could also be possible.
基金supported by the SE Asia Research Group of Royal Holloway University of London,United Kingdom,which is backed by a consortium of oil companiessupported by the Earth Observatory of Singapore(EOS),Singapore and comprises EOS contribution number 508
文摘The Poso Depression provides a record of Plio-Pleistocene environments and palaeogeography of Central Sulawesi.Outcrop-based sedimentological and provenance studies suggest that during the Pliocene the Poso Depression was a sea channel connecting Gorontalo and Bone bays formed in an asymmetric half-graben.The Pliocene history began with deposition of the Puna Formation with fan deltas at the eastern basin margin and channel complexes in the deep-water basin further east.Analyses of light and heavy minerals indicate the main sediment source was ultrabasic rocks in East Sulawesi with minor and intermittent magmatic and metamorphic input from West Sulawesi.Later,in the Middle to Late Pliocene,carbonates of the Poso Formation accumulated on the eastern basin margin.They are unconformably overlain by shallow marine glaucophane-rich siliciclastics of the Pleistocene Lage Formation that are associated with the rapid exhu-mation and uplift of the Pompangeo metamorphic complex.This uplift led to the development of a land bridge connecting western and eastern Sulawesi.The terrane evolution favoured increasing the area of exposed land due to rapid tectonic uplift,which when combined with the tropical climate,contributed to faunal speciation and dispersal in Sulawesi.
