Sand Transport in a Cliff Top Dune System at Fonte-De-Telha, Portugal

DWT Jackson, GH NEVIN

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This study describes the present day processes which are building and modifying a system of cliff-top dunes on the mid-western Portuguese coastline (Costa Azul). The site is made up of approximately 4 km of coast consisting of intermediate/reflective beaches with a sandstone cliff 50-6Om high, which as a result of the 1755 earthquake, has been set back 4O-5Om from the back shore. On top of this rests both old and recent cliff-top dunes, those nearest the cliff edge being presently active. Initial results from field work, ground observation, aerial photography and sand grain analysis, show a complex sediment cycle within the active part of the system. This results in the nett aeolian inland movement of sediment from the beach, up over the cliff head and into the cliff-top dune field. A certain degree of negative feedback in the system arises from the downslope gravitational movement of debris eroded from the sandstone cliff-face. Future management of the area requires a more thorough investigation into the dynamics of the system. The current picture of events leads to a note of caution, as factors such as increased vegetation density obstructing inland sediment movement and a detrimental human influence may lead to damage of an important and rare site.
LanguageEnglish
Title of host publicationUnknown Host Publication
Pages81-92
Number of pages110
Publication statusPublished - 17 Jun 1992
EventCOASTAL DUNES : GEOMORPHOLOGY, ECOLOGY AND MANAGEMENT FOR CONSERVATION -
Duration: 17 Jun 1992 → …

Conference

ConferenceCOASTAL DUNES : GEOMORPHOLOGY, ECOLOGY AND MANAGEMENT FOR CONSERVATION
Period17/06/92 → …

Fingerprint

cliff
dune
sand
beach
sandstone
sediment
dune field
coast
aerial photography
fieldwork
earthquake
damage
vegetation

Cite this

Jackson, DWT., & NEVIN, GH. (1992). Sand Transport in a Cliff Top Dune System at Fonte-De-Telha, Portugal. In Unknown Host Publication (pp. 81-92)
Jackson, DWT ; NEVIN, GH. / Sand Transport in a Cliff Top Dune System at Fonte-De-Telha, Portugal. Unknown Host Publication. 1992. pp. 81-92
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abstract = "This study describes the present day processes which are building and modifying a system of cliff-top dunes on the mid-western Portuguese coastline (Costa Azul). The site is made up of approximately 4 km of coast consisting of intermediate/reflective beaches with a sandstone cliff 50-6Om high, which as a result of the 1755 earthquake, has been set back 4O-5Om from the back shore. On top of this rests both old and recent cliff-top dunes, those nearest the cliff edge being presently active. Initial results from field work, ground observation, aerial photography and sand grain analysis, show a complex sediment cycle within the active part of the system. This results in the nett aeolian inland movement of sediment from the beach, up over the cliff head and into the cliff-top dune field. A certain degree of negative feedback in the system arises from the downslope gravitational movement of debris eroded from the sandstone cliff-face. Future management of the area requires a more thorough investigation into the dynamics of the system. The current picture of events leads to a note of caution, as factors such as increased vegetation density obstructing inland sediment movement and a detrimental human influence may lead to damage of an important and rare site.",
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Jackson, DWT & NEVIN, GH 1992, Sand Transport in a Cliff Top Dune System at Fonte-De-Telha, Portugal. in Unknown Host Publication. pp. 81-92, COASTAL DUNES : GEOMORPHOLOGY, ECOLOGY AND MANAGEMENT FOR CONSERVATION, 17/06/92.

Sand Transport in a Cliff Top Dune System at Fonte-De-Telha, Portugal. / Jackson, DWT; NEVIN, GH.

Unknown Host Publication. 1992. p. 81-92.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Sand Transport in a Cliff Top Dune System at Fonte-De-Telha, Portugal

AU - Jackson, DWT

AU - NEVIN, GH

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PY - 1992/6/17

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N2 - This study describes the present day processes which are building and modifying a system of cliff-top dunes on the mid-western Portuguese coastline (Costa Azul). The site is made up of approximately 4 km of coast consisting of intermediate/reflective beaches with a sandstone cliff 50-6Om high, which as a result of the 1755 earthquake, has been set back 4O-5Om from the back shore. On top of this rests both old and recent cliff-top dunes, those nearest the cliff edge being presently active. Initial results from field work, ground observation, aerial photography and sand grain analysis, show a complex sediment cycle within the active part of the system. This results in the nett aeolian inland movement of sediment from the beach, up over the cliff head and into the cliff-top dune field. A certain degree of negative feedback in the system arises from the downslope gravitational movement of debris eroded from the sandstone cliff-face. Future management of the area requires a more thorough investigation into the dynamics of the system. The current picture of events leads to a note of caution, as factors such as increased vegetation density obstructing inland sediment movement and a detrimental human influence may lead to damage of an important and rare site.

AB - This study describes the present day processes which are building and modifying a system of cliff-top dunes on the mid-western Portuguese coastline (Costa Azul). The site is made up of approximately 4 km of coast consisting of intermediate/reflective beaches with a sandstone cliff 50-6Om high, which as a result of the 1755 earthquake, has been set back 4O-5Om from the back shore. On top of this rests both old and recent cliff-top dunes, those nearest the cliff edge being presently active. Initial results from field work, ground observation, aerial photography and sand grain analysis, show a complex sediment cycle within the active part of the system. This results in the nett aeolian inland movement of sediment from the beach, up over the cliff head and into the cliff-top dune field. A certain degree of negative feedback in the system arises from the downslope gravitational movement of debris eroded from the sandstone cliff-face. Future management of the area requires a more thorough investigation into the dynamics of the system. The current picture of events leads to a note of caution, as factors such as increased vegetation density obstructing inland sediment movement and a detrimental human influence may lead to damage of an important and rare site.

M3 - Conference contribution

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Jackson DWT, NEVIN GH. Sand Transport in a Cliff Top Dune System at Fonte-De-Telha, Portugal. In Unknown Host Publication. 1992. p. 81-92