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Efectos de las estructuras construid...

Gomez Velasquez, Juan Felipe.

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Efectos de las estructuras construidas por el hombre sobre tramos de linea de costa al norte, oeste y sur de Puerto Rico (Spanish text).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Efectos de las estructuras construidas por el hombre sobre tramos de linea de costa al norte, oeste y sur de Puerto Rico (Spanish text)./
作者:	Gomez Velasquez, Juan Felipe.
面頁冊數:	150 p.
附註:	Source: Masters Abstracts International, Volume: 43-01, page: 0179.
Contained By:	Masters Abstracts International43-01.
標題:	Environmental Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1421994
ISBN:	0496267310

Efectos de las estructuras construidas por el hombre sobre tramos de linea de costa al norte, oeste y sur de Puerto Rico (Spanish text).
Gomez Velasquez, Juan Felipe.

Efectos de las estructuras construidas por el hombre sobre tramos de linea de costa al norte, oeste y sur de Puerto Rico (Spanish text). - 150 p.

Source: Masters Abstracts International, Volume: 43-01, page: 0179.

Thesis (M.M.S.)--University of Puerto Rico, Mayaguez (Puerto Rico), 2004.

The building of man-made structures may cause unexpected effects in the coastal system. This thesis quantified shoreline changes associated with different kinds of shoreline structures located in sectors of the north, west and south coasts of Puerto Rico. Aerial photographs taken between 1936 and 1998 and Geographical Positions System (GPS) transects were used to measure changes. Each of the photographs was converted to digital format and with the support of a Geographical Information Systems (GIS) program was set to a common coordinate system. The coastline was traced using the wet/dry sand line. When the position of the coastline was obtained for different years, a comparison and quantification of the rate of change was made with positions before and after the structure was built. This procedure showed whether changes in the beach were caused by the structures. (Abstract shortened by UMI.)

ISBN: 0496267310Subjects--Topical Terms:

676987
Environmental Sciences.

Efectos de las estructuras construidas por el hombre sobre tramos de linea de costa al norte, oeste y sur de Puerto Rico (Spanish text).
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500 $a Adviser: Jack Morelock.
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520 $a The building of man-made structures may cause unexpected effects in the coastal system. This thesis quantified shoreline changes associated with different kinds of shoreline structures located in sectors of the north, west and south coasts of Puerto Rico. Aerial photographs taken between 1936 and 1998 and Geographical Positions System (GPS) transects were used to measure changes. Each of the photographs was converted to digital format and with the support of a Geographical Information Systems (GIS) program was set to a common coordinate system. The coastline was traced using the wet/dry sand line. When the position of the coastline was obtained for different years, a comparison and quantification of the rate of change was made with positions before and after the structure was built. This procedure showed whether changes in the beach were caused by the structures. (Abstract shortened by UMI.)
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