نتایج جستجو برای: shoreline
تعداد نتایج: 2852 فیلتر نتایج به سال:
Acknowledgments T he Nearshore Science Team (NST) of the Puget Sound Nearshore Project recognized in early discussions the need for a geomorphic framework to guide shoreline restoration planning. These individuals clarified the rationale and the purpose for this document and provided valuable comments on early drafts of the report. This project also benefitted greatly from the input of Washingt...
Successful protection and restoration of Great Lakes nearshore ecosystems will likely rely on management of terrestrial resources along Great Lakes shorelines. However, relationships between biological communities and changing shoreline environmental properties are poorly understood. We sought to begin understanding the potential roles of shoreline geomorphological and land cover properties in ...
The British Petroleum Deepwater Horizon Oil Spill in the Gulf of Mexico was the biggest oil spill in US history. To assess the impact of the oil spill on the saltmarsh plant community, we examined Advanced Visible Infrared Imaging Spectrometer (AVIRIS) data flown over Barataria Bay, Louisiana in September 2010 and August 2011. Oil contamination was mapped using oil absorption features in pixel ...
This paper evaluates the accuracy of shoreline positions obtained from the infrared (IR) bands of Landsat 7, Landsat 8, and Sentinel-2 imagery on natural beaches. A workflow for sub-pixel shoreline extraction, already tested on seawalls, is used. The present work analyzes the behavior of that workflow and resultant shorelines on a micro-tidal (<20 cm) sandy beach and makes a comparison with oth...
Background Burnett County, located in northwest Wisconsin within a few hours of the Twin-Cities metropolitan region, is home to over 500 lakes (see Figure 1). Heavy development pressures and a strong local identity with the lakes have fueled interest in protecting their health and aesthetic appeal. The county enjoys a long history of partnerships for lake management that includes county agencie...
The shoreline is one of the most important features on earth’s surface. It is valuable to a diverse user community. But the dynamic nature of the shorelinemakes it dif cult to be represented in a naturally dynamic style and to be utilized in applications.The of cially usedshoreline,for examplein nauticalcharts,is the so-calledtide-coordinatedshoreline. It is also the shoreline that makes the ...
In metropolitan regions made up of multiple independent jurisdictions, adaptation to increased coastal flooding due to sea level rise requires coordinated strategic planning of the physical and organizational approaches to be adopted. Here, we explore a flexible method for estimating physical adaptation costs along the San Francisco Bay shoreline. Our goal is to identify uncertainties that can ...
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 ...
During any marine oil spill, floating oil slicks that reach shorelines threaten a wide array of coastal habitats. To assess the presence of oil near shorelines during the Deepwater Horizon (DWH) oil spill, we scanned the library of Synthetic Aperture Radar (SAR) imagery collected during the event to determine which images intersected shorelines and appeared to contain oil. In total, 715 SAR ima...
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