نتایج جستجو برای: shoreline changes

تعداد نتایج: 874088  

Journal: :Remote Sensing 2016
Ratna Sari Dewi Wietske Bijker Alfred Stein Muh Aris Marfai

This study presents an unsupervised fuzzy c-means classification (FCM) to observe the shoreline positions. We combined crisp and fuzzy methods for change detection. We addressed two perspectives of uncertainty: (1) uncertainty that is inherent to shoreline positions as observed from remote sensing images due to its continuous variation over time; and (2) the uncertainty of the change results pr...

2011
J. Yu Y. Fu Y. Li G. Han Y. Wang D. Zhou W. Sun Y. Gao F. X. Meixner

The Yellow River, which is the second largest river in China, is regarded as the world’s largest contributor of fluvial sediment load to the ocean. In recent decades, the dramatic reduction in water discharge and sediment load due to climate change and human activities in the drainage basin has greatly constrained the evolution process of Yellow River delta. We highlight how runoff and sediment...

2013
Sten Berglund Emma Bosson Mona Sassner

This paper presents an analysis of present and future hydrological conditions at the Forsmark site in Sweden, which has been proposed as the site for a geological repository for spent nuclear fuel. Forsmark is a coastal site that changes in response to shoreline displacement. In the considered time frame (until year 10 000 AD), the hydrological system will be affected by landscape succession as...

2017
Helene Burningham Jon French

Article history: Received 7 October 2016 Received in revised form 2 December 2016 Accepted 28 December 2016 Available online 12 January 2017 Shoreline change analysis is a well defined andwidely adopted approach for the examination of trends in coastal position over different timescales. Conventional shoreline changemetrics are best suited to resolving progressive quasi-linear trends. However, ...

Journal: :Coastal Engineering Proceedings 1988

2012
Del Río Laura F. Javier

The evaluation of error or uncertainty in shoreline change studies is an issue of prime importance for providing an adequate framework for calculated rates of change, and to allow the establishment of threshold values above which the rates would be significant. In this note a practical, easy-to-use method is presented to estimate error involved in the calculation of shoreline changes on aerial ...

2011
E. D. Lazarus D. E. McNamara M. D. Smith S. Gopalakrishnan A. B. Murray

Developed coastal areas often exhibit a strong systemic coupling between shoreline dynamics and economic dynamics. “Beach nourishment”, a common erosion-control practice, involves mechanically depositing sediment from outside the local littoral system onto an actively eroding shoreline to alter shoreline morphology. Natural sedimenttransport processes quickly rework the newly engineered beach, ...

2016
Diego Garcia Sarah Hamylton

We welcome Sheppard's comments on our recent assessment of both ecological and geomorphic change at Diego Garcia Atoll in the central Indian Ocean [1]. Whilst our assessment incorporated numerous aspects of change, including movements of the lagoon rim shorelines, changes in the terrestrial vegetation on the lagoon rim and amendments to the bathymetry of the lagoon basin through dredging activi...

2018
Arthur Robinet Bruno Castelle Déborah Idier Vincent Marieu Kristen Splinter Mitchell Harley Kristen D. Splinter Mitchell D. Harley

We present a new empirical shoreline evolution model integrating longshore and cross-shore processes. It is designed for wave-dominated sandy coasts and includes feedback between shoreline and wave dynamics. It can also take into account non-erodible (e.g. rocks, artificial structures) contours and complex wave propagation patterns through the coupling with the spectral wave model SWAN. While t...

Journal: :ISPRS Int. J. Geo-Information 2013
Diana Mitsova-Boneva Frank Wissinger Ann-Margaret Esnard Ravi Shankar Peter Gies

We are developing a geospatial inventory tool that will guide habitat conservation, restoration and coastal development and benefit several stakeholders who seek mitigation and adaptation strategies to shoreline changes resulting from erosion and sea level rise. The ESRI Geoportal Server, which is a type of web portal used to find and access geospatial information in a central repository, is cu...

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