scholarly journals OPTIMISATION OF MODELS FOR THE DETERMINATION OF THE CREST OF BARS ON SANDY BEACHES

2019 ◽  
Author(s):  
ISABEL LÓPEZ ◽  
YOLANDA VILLACAMPA ◽  
JOSE IGNACIO PAGÁN ◽  
FRANCISCO JOSÉ NAVARRO-GONZÁLEZ ◽  
LUIS ARAGONÉS
Keyword(s):  
Sandy Beaches

Detection and Delineation of Potential Areas for Tourism Activities in Coastal Zone of Ratnagiri District, Maharashtra (India)

2021 ◽  
Vol 5 (2) ◽  
pp. 79-113
Author(s):  
Sanjay Navale ◽  
Vijay Bhagat
Keyword(s):  
Sandy Beaches ◽  
Underdeveloped Countries ◽  
Precise Analysis ◽  
Distance Weighted ◽  
Lowland Area ◽  
Overlay Technique ◽  
Tourism Potential ◽  
Gis Software ◽  
Very High

Tourism is a device of economic development in developed, developing, and even in underdeveloped countries. The AHP based MCDA techniques used for detection and delineation of the tourism potential zones in the coastal area of Ratnagiri district in Maharashtra (India). The conventional and satellite data viz. ASTER data has been used for spatial analysis in GIS software. Seacoast, elevation, slope, river, LULC, available amenities, accessibility and connectivity, cultural and historical places, and density of settlements used as the criterions for detection of potential zones for tourism activities. The experts’ opinions, literature survey and fieldwork used as the source of information for the selection of criterions and determination of ranks. The weighted overlay technique used to find the comparative levels of tourism potentials: very high, high, moderate and less potentials for tourism. About 13% of TGA shows comparatively very high tourism potential, 25.80% shows high, 54.62 % shows moderate, and 6.57 % shows less tourism potential. The overall accuracy of the categorized map estimated about 89.60%. The thematic maps viz. amenities and settlement were processed using inverse distance weighted (IWD) interpolation technique. Therefore, some areas from the category, ‘high potential’ merged in the category, ‘moderate potential’ and reduced the producer’s accuracy of the classified map. The sandy beaches, lowland area with a gentle slope, river landscape features, road network, cultural and historical places, ideal size of settlements and number of amenities are attractions of tourists in the region. The technique used in this study can be an effective apparatus for precise analysis of site suitability for tourism activities.

BEACH RESTORATION PROCEDURES

1995 ◽  
Vol 1995 (1) ◽  
pp. 862-863
Author(s):  
Robert W. Castle ◽  
Frederick Wehrenberg ◽  
Harris W. Martin
Keyword(s):  
Environmental Conditions ◽  
Oil Spills ◽  
Sandy Beaches ◽  
Emergency Responses ◽  
Universal Procedure ◽  
Selection Of

ABSTRACT A variety of procedures have been applied to the restoration of sandy beaches impacted by oil spills. These procedures have met with varying degrees of success, depending on factors including the nature of the oil, beach characteristics, and environmental conditions. Based on the assumption that no universal procedure exists for beach restoration, determination of appropriate procedures requires evaluation of incident-specific conditions. A series of decision guides has been developed to assist in this process. These decision guides, suitable for development of spill contingency response plans and during actual emergency responses, have been developed to aid in the selection of the most appropriate techniques.

Meiofauna of the industrialised estuary and Firth of Forth, Scotland

1987 ◽  
Vol 93 (3-4) ◽  
pp. 415-430 ◽  
Author(s):  
C. G. Moore
Keyword(s):  
Treatment Process ◽  
Sewage Treatment ◽  
Oxygen Depletion ◽  
Sandy Beaches ◽  
Sediment Type ◽  
Sewage Pollution ◽  
Salinity Regime ◽  
Mesohaline Zone ◽  
Firth Of Forth

SynopsisKnowledge concerning the meiofauna of the Forth is reviewed and extended by presentation of the results of new surveys of the intertidal and subtidal provinces of the estuary. Most of the published information concerns the influence of sewage pollution on shores of the firth. Before 1979, the meiofaunal communities of sandy beaches along the Edinburgh coastline exhibited reduced species richness, although certain taxa displayed enhanced densities. Improvements in the sewage treatment process have initiated a phase of meiofaunal recovery.In the estuary the salinity regime plays a key role in the determination of species composition, although the influence of local changes in sediment type and stability is recognised. Meiofaunal communities of lower shore mudflats in different salinity zones of the estuary are described. Pollution plays a major modifying role. In the upper reaches of the estuary, which suffer oxygen depletion in summer, only nematodes and oligochaetes were recorded in the oligohaline zone and impoverished nematode and copepod faunas in the mesohaline zone. In the polyhaline zone discharges from the industrialised region around Grangemouth modify meiofaunal community structure over an extensive area of mudflat. The subtidal meiofauna of the lower estuary is briefly described, particularly with respect to the copepods. Impoverishment again occurs in the vicinity of Grangemouth.

Copper accumulation and toxicity in the yellow clam Mesodesma mactroides DESAHYES 1854 (BIVALVIA, MESODESMATIDAE)

2014 ◽  
Vol 3 (2) ◽  
pp. 15
Author(s):  
Samantha Eslava Gonçalves Martins ◽  
Adalto Bianchini
Keyword(s):  
Urban Development ◽  
Digestive Gland ◽  
Intertidal Zone ◽  
Sandy Beaches ◽  
Copper Accumulation ◽  
Suitable Model ◽  
Copper Contamination ◽  
Settlement Studies ◽  
Determination Of Copper

The yellow clam Mesodesma mactroides depends on the intertidal zone of the southernmost Brazilian sandy beaches for recruitment or settlement. Studies aiming to evaluate any kind of alteration of this ecosystem are very important because of the growing industrial and urban development observed around this region over the last decades. Therefore, the main goal of the present study was to evaluate copper accumulation and toxicity in M. mactroides to verify its response to increased environmental levels of this metal. Yellow clams were acutely (96 h) exposed to copper for determination of copper accumulation and toxicity (LC50). Results showed that M. mactroides accumulated copper in its tissues (gills and digestive gland) and was quite tolerant to copper, suggesting this species as a suitable model for future biomonitoring programs of copper contamination in sandy beaches.

Erosion or Coastal Variability: An Evaluation of the DSAS and the Change Polygon Methods for the Determination of Erosive Processes on Sandy Beaches

2013 ◽  
Vol 165 ◽  
pp. 1710-1714 ◽  
Author(s):  
Miguel Albuquerque ◽  
Jean Espinoza ◽  
Priscila Teixeira ◽  
Alan de Oliveira ◽  
Iran Corrêa ◽  
...  
Keyword(s):  
Sandy Beaches

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

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