نتایج جستجو برای: coastal sand barriers

تعداد نتایج: 161667  

خسروی , محمود , فتوحی, صمد , پیروزاده, سلیمان ,

Iran is among 10 top potential countries of occurrence of natural hazards in the world and from among 35 natural hazards, so far about 30 hazards have occurred in Iran(Negaresh and Latifi,2009). One of the different types of natural hazards which every year causes a lot of damage particularly in arid and arid regions of the world is the existence of sandy hills(Omidwar,2006); sandy hills are mo...

2006
T G JAGTAP S NAIK V L NAGLE

The part of central west coast (Maharashtra and Goa) of India has been classified and quantified for coastal wetlands using LANDSAT data of 1985-86. The classification accuracy of the maps and area estimates achieved was 84% at 90% confidence level and the planimetric accuracy at 1:2.50.000 scale was 0.3 mm. The total coastal wetland areas in Maharashtra and Goa. have been estimated to be 1567 ...

Journal: :Remote Sensing 2016
Estelle Chaussard Sara Kerosky

Magnetite is a type of iron ore and a valuable commodity that occurs naturally in black sand beaches in the Philippines. However, black sand mining often takes place illegally and increases the likelihood and magnitude of geohazards, such as land subsidence, which augments the exposure of local communities to sea level rise and to typhoon-related threats. Detection of black sand mining activiti...

2016
S. D. Sharma L. Nayak S. Samantaray M. P. Pati

Article history: Received 31 August 2016 Accepted 16 September 2016 Available online 03 October 2016 Coastal sandy beaches are considered to be an integral part of the coastal ecosystems in marine environment. Sandy beach is an extremely dynamic environment where sand and water are always in motion. There are several fauna and flora occurring in this zone. The mole crab, Emerita asiatica is one...

2014
G. Anfuso A. T. Williams J. A. Cabrera Hernández E. Pranzini

Coastal scenic assessments via checklist tables (18 natural, 8 human related parameters), can provide benchmark measures regarding desirable/non-desirable beach conditions and also classify sites. The scenic value for 43 sites in western Cuba was investigated, with the aim of helping managers improve bathing areas, especially for tourism purposes. Sites were categorised from Class 1, (top grade...

2007
Alfio RASPI Roberto CANOVAI Augusto LONI Luciano SANTINI

Multi-year observations on the life-cycle of Leptoconops (Holoconops) kerteszi Kieffer (Diptera Ceratopogonidae) were carried out in the coastal areas of Grosseto (Italy). In the studied environment, most of the populations complete two generations within a year. Overwintering is assured by the larvae. Using a simple and functional sampling technique of preimaginal stages, we obtained a general...

Journal: :Journal of colloid and interface science 1998
Truesdail Lukasik Farrah Shah Dickinson

The aim of this study was to investigate the importance of surface potential in microbial deposition onto modified granular surfaces. Recent experimental and theoretical work has indicated that surfaces coated with metal oxides and hydroxide rich oxide/hydroxide mixtures ((hydr)oxides) have the potential to increase the capture efficiencies of commercial filtration systems. This study quantitat...

2014
Elizabeth Halliday Sandra L. McLellan Linda A. Amaral-Zettler Mitchell L. Sogin Rebecca J. Gast

Recreational water quality, as measured by culturable fecal indicator bacteria (FIB), may be influenced by persistent populations of these bacteria in local sands or wrack, in addition to varied fecal inputs from human and/or animal sources. In this study, pyrosequencing was used to generate short sequence tags of the 16S hypervariable region ribosomal DNA from shallow water samples and from sa...

Journal: :Anais da Academia Brasileira de Ciencias 2008
Abílio C S P Bittencourt Zelinda M A N Leão Ruy K P Kikuchi José M L Dominguez

This paper shows that the location of the shoreface bank reefs along the northeastern and eastern coasts of Brazil, in a first order approximation, seem to be controlled by the deficit of sediment in the coastal system. The sediment transport pattern defined by a numerical modeling of wave refraction diagrams, representing circa 2000 km of the northeastern and eastern coasts of Brazil, permitte...

2003
Sérgio H. C. D. Larangeiro Filipa S. B. F. Oliveira

This study applies some of the most practical longshore sand transport formulations and evaluates their adequacy to estimate the total (suspended and bed load) longshore sediment transport rate (LSTR) at Buarcos Beach, in the West coast of Portugal. The straightforward methodology here present is simple to apply and therefore useful to quickly obtain a first estimate of the littoral transport i...

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