Salt-water fishery resources and shoreline development in the southern Hood Canal area, Washington

The salt water mixes with fresh water and forms brackish water. The brackish water contains some quantity of salt, but not equal to sea water. Salinity determines the geographic distribution of the number of marshes found in estuary. Hence salinity is a very important environmental factor in estuary system. Sand is one major natural aggregate, required in construction industry mainly for the manufacture of concrete. The availability of good river sand is reduced due to salinity. The quality of sand available from estuarine regions is adversely affected due to this reason. It is the responsibility of engineers to check the quality of sand and its strength parameters before using it for any construction purpose. Presence of salt content in natural aggregates or manufactured aggregates is the cause for corrosion in steel. In this study the amount of salinity present in estuary sand was determined. Three different methods were used to determine the salinity in different seasonal variations. The sand sample collected nearer to the sea was found to be high in salinity in all methods. It can be concluded that care should be taken before we use estuary sand as a construction material due to the presence of salinity.

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Assessing flood risk and detecting changes of salt water inflow in a coastal micro-tidal brackish marsh using GIS

Oceanological and Hydrobiological Studies ◽

10.2478/v10009-008-0011-3 ◽

2008 ◽

Vol 37 (3) ◽

Author(s):

Jacek Urbański ◽

Agata Ślimak

Keyword(s):

Sea Level Rise ◽

Sea Level ◽

Flood Risk ◽

Salt Water ◽

Brackish Marsh ◽

Distance Functions ◽

Water Inflow ◽

Small Range ◽

Natural Environments ◽

Baltic Coast

Assessing flood risk and detecting changes of salt water inflow in a coastal micro-tidal brackish marsh using GISIn order to assess changes in salt water inflow and potential flood risks due to sea level rise in a micro-tidal Beka brackish marsh on the Polish Baltic Coast GIS was used. Such wetlands are important elements of coastal zone natural environments. Creating a geodatabase within a GIS system makes it possible to carry out broad analyses of complex systems, such as coastal wetlands. The results indicate that a 40 cm sea-level rise would considerably increase the frequency of flooding in the investigated area, in part because of the small range of the annual sea level oscillations there. A map of the index of changes in saltwater inflow, created with the help of cost-weighted distance (functions), shows that changes which have occurred along the shore, consisting of filling in the drainage channel outlets, have likely had a significant impact on the vegetation of the area.

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Pescadores migrantes: análisis de su dinámica e integración Social

Studies of Applied Economics ◽

10.25115/eea.v37i3.2770 ◽

2019 ◽

Vol 37 (3) ◽

pp. 18

Author(s):

Fernando González Laxe

Keyword(s):

Renewable Resources ◽

Sustainable Management ◽

Social Groups ◽

Technological Innovations ◽

Social Competition ◽

Factors Affecting ◽

Fish Stocks ◽

Fishery Resources ◽

Migration Dynamics ◽

The Many

The globalization of the economy encourages massive population displacements and inevitably generates a cosmopolitization of societies. This leads to concern, misunderstanding and rejection. The most vulnerable social groups in society can perceive the population as intruders and enemies in social competition. Undoubtedly, the extreme spatial instability of fishery resources is among the many factors affecting migration dynamics. Various reasons for the mobility of fishermen are relevant around this concept. These include aspect related to traditions, to the capitalisation of activity, to technological innovations, and to innovation exchanges concerning the location of fish stocks. This article reflects on spatial increase of fishermen’s. The analyse are part of the paradigm of the sustainable management of common renewable resources, in particular fishery resources. It presents three lines of analysis: the reason for mobility; the choice of destination; and are the integration into host units.

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