Coastal hazards of Fajã do Calhau (São Miguel – Azores): a first approach: Rangel, B.,

Anthony Gallagher, Helena Colado, G Lameiras, J Fontiela, P Borges, O Vieira, B Rangel

Research output: Contribution to journalArticle

Abstract

Fajã do Calhau is a supratidal talus-platform located on the South-East coast of São Miguel Island (Azores). Locally called “fajãs”, these flat platforms with hummocky surfaces result from landslides and are relatively common coastal features in the archipelago, occurring on the toe of the cliffed coasts of most Azorean islands. Fajã do Calhau is at the foot of a 380 m high cliff and has an area of approximately 220,000 m2, circa 1300 m length and maximum width of 260 m. The seaward margin of the fajã consists of a scarped active bluff with modal and maximum elevations of 5 and 10 m above sea level, respectively. A gravel beach leans against this bluff. Fajã do Calhau attracted, in recent past, human settling due to its agriculture potential, in spite of the hazards arising from storms and landslides. Nowadays, this area is again increasing in value and attractiveness but as a result of the demand for second housing and seasonal leisure activities. This lead to the on-going construction of a new accessibility, which will further increase the human occupation rates both in space and time.The main coastal hazards of the Fajã do Calhau are coastal erosion (with present-day rates of 0.20 m/yr), coastal storms, mainly from SW, and coastal flooding (on average once every 7 years). Besides these, others with larger recurrence intervals, such as the ones inherent to the genesis of both this feature – landslides and earthquakes – and island volcanism.
Original languageEnglish
Pages (from-to)827-831
Number of pages5
JournalJournal of Coastal Research
Volume56
Issue number1
Publication statusPublished - 2009

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landslide
hazard
talus
coastal erosion
recurrence interval
coast
cliff
accessibility
archipelago
occupation
volcanism
gravel
beach
flooding
sea level
agriculture
earthquake
rate
leisure activity
demand

Cite this

Gallagher, A., Colado, H., Lameiras, G., Fontiela, J., Borges, P., Vieira, O., & Rangel, B. (2009). Coastal hazards of Fajã do Calhau (São Miguel – Azores): a first approach: Rangel, B., Journal of Coastal Research, 56(1), 827-831.
Gallagher, Anthony ; Colado, Helena ; Lameiras, G ; Fontiela, J ; Borges, P ; Vieira, O ; Rangel, B. / Coastal hazards of Fajã do Calhau (São Miguel – Azores): a first approach : Rangel, B.,. In: Journal of Coastal Research. 2009 ; Vol. 56, No. 1. pp. 827-831.
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abstract = "Faj{\~a} do Calhau is a supratidal talus-platform located on the South-East coast of S{\~a}o Miguel Island (Azores). Locally called “faj{\~a}s”, these flat platforms with hummocky surfaces result from landslides and are relatively common coastal features in the archipelago, occurring on the toe of the cliffed coasts of most Azorean islands. Faj{\~a} do Calhau is at the foot of a 380 m high cliff and has an area of approximately 220,000 m2, circa 1300 m length and maximum width of 260 m. The seaward margin of the faj{\~a} consists of a scarped active bluff with modal and maximum elevations of 5 and 10 m above sea level, respectively. A gravel beach leans against this bluff. Faj{\~a} do Calhau attracted, in recent past, human settling due to its agriculture potential, in spite of the hazards arising from storms and landslides. Nowadays, this area is again increasing in value and attractiveness but as a result of the demand for second housing and seasonal leisure activities. This lead to the on-going construction of a new accessibility, which will further increase the human occupation rates both in space and time.The main coastal hazards of the Faj{\~a} do Calhau are coastal erosion (with present-day rates of 0.20 m/yr), coastal storms, mainly from SW, and coastal flooding (on average once every 7 years). Besides these, others with larger recurrence intervals, such as the ones inherent to the genesis of both this feature – landslides and earthquakes – and island volcanism.",
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Gallagher, A, Colado, H, Lameiras, G, Fontiela, J, Borges, P, Vieira, O & Rangel, B 2009, 'Coastal hazards of Fajã do Calhau (São Miguel – Azores): a first approach: Rangel, B.,' Journal of Coastal Research, vol. 56, no. 1, pp. 827-831.

Coastal hazards of Fajã do Calhau (São Miguel – Azores): a first approach : Rangel, B., / Gallagher, Anthony; Colado, Helena; Lameiras, G; Fontiela, J; Borges, P; Vieira, O; Rangel, B.

In: Journal of Coastal Research, Vol. 56, No. 1, 2009, p. 827-831.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Coastal hazards of Fajã do Calhau (São Miguel – Azores): a first approach

T2 - Rangel, B.,

AU - Gallagher, Anthony

AU - Colado, Helena

AU - Lameiras, G

AU - Fontiela, J

AU - Borges, P

AU - Vieira, O

AU - Rangel, B

PY - 2009

Y1 - 2009

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AB - Fajã do Calhau is a supratidal talus-platform located on the South-East coast of São Miguel Island (Azores). Locally called “fajãs”, these flat platforms with hummocky surfaces result from landslides and are relatively common coastal features in the archipelago, occurring on the toe of the cliffed coasts of most Azorean islands. Fajã do Calhau is at the foot of a 380 m high cliff and has an area of approximately 220,000 m2, circa 1300 m length and maximum width of 260 m. The seaward margin of the fajã consists of a scarped active bluff with modal and maximum elevations of 5 and 10 m above sea level, respectively. A gravel beach leans against this bluff. Fajã do Calhau attracted, in recent past, human settling due to its agriculture potential, in spite of the hazards arising from storms and landslides. Nowadays, this area is again increasing in value and attractiveness but as a result of the demand for second housing and seasonal leisure activities. This lead to the on-going construction of a new accessibility, which will further increase the human occupation rates both in space and time.The main coastal hazards of the Fajã do Calhau are coastal erosion (with present-day rates of 0.20 m/yr), coastal storms, mainly from SW, and coastal flooding (on average once every 7 years). Besides these, others with larger recurrence intervals, such as the ones inherent to the genesis of both this feature – landslides and earthquakes – and island volcanism.

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M3 - Article

VL - 56

SP - 827

EP - 831

JO - Journal of Coastal Research

JF - Journal of Coastal Research

SN - 0749-0208

IS - 1

ER -

Gallagher A, Colado H, Lameiras G, Fontiela J, Borges P, Vieira O et al. Coastal hazards of Fajã do Calhau (São Miguel – Azores): a first approach: Rangel, B., Journal of Coastal Research. 2009;56(1):827-831.