We investigated the relative roles of natural factors and shoreline harvest leading to recent declines of the black leather chiton (Katharina tunicata) on the outer Kenai Peninsula, Alaska (U.S.A.). This intertidal mollusk is a strongly interacting grazer and a culturally important subsistence fishery for Sugpiaq (Chugach Alutiiq) natives. We took multiple approaches to determine causes of decl...

The world’s largest deltas are densely populated, of significant economic importance and among the most valuable coastal ecosystems. Projected twenty-first century sea-level rise (SLR) poses a threat to these low-lying coastal environments with inhabitants, resources and ecology becoming increasingly vulnerable to flooding. Large spatial differences exist in the parameters shaping the world’s d...

In coastal regions, water, wind, gravitation, vegetation, and human activity continuously alter landscape surfaces. Visualizations are important for understanding coastal landscape evolution and its driving processes. Visualizing change in highly dynamic coastal terrain poses a formidable challenge; the combination of natural and anthropogenic forces leads to cycles of retreat and recovery and ...

11 The growth of megacusps as shoreline instabilities is investigated by ex-12 amining the coupling between wave transformation in the shoaling zone, long-13 shore transport in the surf zone, cross-shore transport, and morphological 14 evolution. This coupling is known to drive a potential positive feedback in 15 case of very oblique wave incidence, leading to an unstable shoreline and the 16 c...

Information on the pattern, rhythm and long-term trend of shoreline dynamics is vital to managing the coast, especially in mapping risk areas and in establishing the width of construction setback lines. Unfortunately, such data are often missing or where present of doubtful quality. In this paper, we share our experience in mapping coastline change in Singapore, using geographic information sys...

River deltaic estuaries are dynamic ecosystems characterised by linkages between tidal currents, river water discharge, and sediment from the basin. The present study is based on application of remote data: multispectral satellite images, DEM, LULC (Land use land cover), lithology, hydroclimatic factors. standardised methodology was adoption a coupled modelling approach for this work, involving...

19. ABSTRACT (Continue on reverse if necessary and identify by block number) This report stems from a NORDA evaluation of DMA's prototype World Vector Shoreline (WVS). NORDA personnel evaluated the ease of reading the WVS documentation, understanding the file structure, inputting the data from a tape file into program data structures, and plotting the shoreline vectors. Those who participated i...

a B B o f J h w w Deposits of a transgressive-phase Lake Bonneville stillstand or scillation are found just below the elevation of the regressivehase Provo shoreline at numerous exposures throughout the onneville basin. Existence of these subProvo shoreline deposits rovides a new explanation for the massive size of Provo deposiional and erosional landforms, which can no longer be explained y a ...

The latest generation of high-resolution commercial imaging satellites, such as IKONOS and QuickBird, has opened a new era of earth observation and digital mapping. This paper presents the geometric modeling principles and photogrammetric processing methods involved in high-precision mapping using stereo IKONOS and QuickBird images. First, the imaging geometry and systematic errors in the Ratio...

4 Humans are increasingly altering the Earth’s surface, and affecting processes that shape and 5 reshape landscapes. In many cases, humans are reacting to landscape-change processes that 6 represent natural hazards. Thus, the landscape is reacting to humans who are reacting to the 7 landscape. When the timescales for landscape change are comparable to those of human 8 dynamics, human and ‘natur...