Storm surge

Geoscience Australia, in an open collaboration with the Mathematical Sciences Institute, The Australian National University, is developing a software ap- plication, ANUGA, to model the hydrodynamics of floods, storm surges and tsunamis. The free source software implements a finite volume central- upwind Godunov method to solve the non-linear depth-averagedshallowwater waveequations. Inlight of the renewed interest in tsunami forecasting and mitigation,

The scientific literature has documented the growing risks of flooding posed for Asia’s coastal cities by the combination of climate change, as reflected in sea level rise and intensified storms and storm surges, and ongoing urban growth in low-lying coastal zones. These issues were already elaborated in the 2007 IPCC (IPCC, 2007) reports but recent studies indicate that climate change, sea level rise and the sinking of the deltas on which most Asian mega urban regions have arisen, are all occurring at much faster rates than earlier projected and therefore pose even greater risks than previously indicated. Global warming appears to be accelerating and may increase to 4° C or more by the end of this century, twice the earlier IPCC projections. The sea level is now expected to rise by one meter or more by 2100; two or three times the earlier projections. The recent typhoons and rains striking Southeast Asia have been the most intense in decades as would be expected as a result of glob...

The mesoscale (time) control of annual storm-surge activity on quasi-annual saltmarsh (tidal marsh) deposition is studied from two estuarine saltmarshes on the high-energy NW coast of Ireland. Both saltmarshes exhibit a cliffed edge where maximum sedimentary variation is expressed in the form of lamination. Sections were logged and characterised by lithofacies based on grain-size determinations. Sections dated using Cs and

The risk that tropical storm occurrence may alter as a result of global warming presents coastal managers, particularly in vulnerable areas, with a serious challenge. Many countries are hard-pressed to protect their coastal resources against present-day hazards, let alone any increased threat in the future. Moreover, the threat posed by climate change is uncertain making the increased costs of protection difficult to justify. Here, we examine one management strategy, based on the rehabilitation of the mangrove ecosystem, which may provide a dual, “winwin” benefit in improving the livelihood of local resource users as well as enhancing sea defences. The strategy, therefore, represents a precautionary approach to climate impact mitigation. This paper quantifies the economic benefits of mangrove rehabilitation undertaken, inter alia, to enhance sea defence systems in three coastal Districts of northern Vietnam. The results of the analysis show that mangrove rehabilitation can be desirable from an economic perspective based solely on the direct use benefits by local communities. Such activities have even higher benefit cost ratios with the inclusion of the indirect benefits resulting from the avoided maintenance cost for the sea dike system which the mangrove stands protect from coastal storm surges.

Fast-growing, coastal mega cities along China's east coast and the rim of the Cross-Straits region, in particular, are becoming increasingly more vulnerable to potential natural disasters such as earthquakes, tsunamis, typhoons, storm surges and floods. The provinces of Shanghai, Guangdong, Fujian, and Zhejiang, as well as Taiwan, are threatened by common disasters. Advancing Cross- Straits ties in mitigating the impact

On February 17,1996, at 0559 UT, a major earthquake with moment magnitude (Mw) 7.9 killed 107 people and caused major damage at Biak Island, 30-40 km southwest of the earthquake's epicenter (Figures 1 and 2). A devastating tsunami washed away all of the houses at Korim, a small village located in a narrow bay facing directly towards the incoming wave, and it left behind clear evidence of sand erosion and deposition that indicated how far the tsunami advanced. An unexpectedly large tsunami run-up of 7.7 m was measured at Wardo in western Biak, which faces away from the primary tsunami source. This high run-up may have been caused by a local submarine landslide.

In this chapter, we will see the geographic and societal situation of the coast and its management on a sub-regional basis. The subregion introduced first is East Asia, for which we will see China, Korea, Taiwan, and Japan. Coastal zones of East Asia are characterized by diversity of coastal morphology and strong oceanic and climatic activities. They have long suffered

In this study critical thresholds are defined for storm impacts along the Spanish coast of the Gulf of C??diz. The thresholds correspond to the minimum wave and tide conditions necessary to produce significant morphological changes on beaches and dunes and/or ...

An assessment is made of contemporary effective sea-level rise (ESLR) for a sample of 40 deltas distributed worldwide. For any delta, ESLR is a net rate, defined by the combination of eustatic sea-level rise, the natural gross rate of fluvial sediment deposition and subsidence, and accelerated subsidence due to groundwater and hydrocarbon extraction. ESLR is estimated under present conditions using

Hurricane Katrina has had a devastating impact on the US Gulf Coast. Forecasts of such events, coupled with timely response, can greatly reduce casualties and save billions of dollars. In our effort, we use sophisticated surface, flow and volume visu- alization techniques show the storm surge and atmospheric simula- tions simulation results superimposed with actual observations, in- cluding satellite cloud

... doi:10.1016/j.geomorph.2006.06.007 | How to Cite or Link Using DOI Copyright © 2006 Elsevier ... luminescence (OSL) to both trace and contribute to the debate on coastal dune initiation. ... the Danish Wadden Sea barriers are likely to have formed mainly through onshore directed ...