Storm surges and coastal impacts at Mar del Plata, Argentina
Positive storm surges (PSS) lasting for several days can raise the water level producing significant differences between the observed level and the astronomical tide. These storm events can be more severe if they coincide with a high tide or if they bracket several tidal cycles, particularly in the...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02784343_v29_n14_p1643_Fiore http://hdl.handle.net/20.500.12110/paper_02784343_v29_n14_p1643_Fiore |
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paper:paper_02784343_v29_n14_p1643_Fiore2023-06-08T15:26:48Z Storm surges and coastal impacts at Mar del Plata, Argentina Argentina Beach profiles Erosion Mar del Plata Sea level Storm index Storm surges beach profile erosion rate sea level change statistical analysis storm surge tidal cycle tide gauge water level Argentina Buenos Aires [Argentina] Mar del Plata South America Positive storm surges (PSS) lasting for several days can raise the water level producing significant differences between the observed level and the astronomical tide. These storm events can be more severe if they coincide with a high tide or if they bracket several tidal cycles, particularly in the case of the highest astronomical tide. Besides, the abnormal sea-level elevation near the coast can cause the highest waves generated to attack the upper beach. This combination of factors can produce severe erosion, threatening sectors located along the coastline. These effects would be more serious if the storm surge height and duration increase as a result of a climatic change. The Mar del Plata (Argentina) coastline and adjacent areas are exposed to such effects. A statistical characterization of PSS based on their intensity, duration and frequency, including a surge event classification, was performed utilizing tide-gauge records over the period 1956-2005. A storm erosion potential index (SEPI) was calculated from observed levels based on hourly water level measurements. The index was related to beach profile responses to storm events. Also, a return period for extreme SEPI values was calculated. Results show an increase in the average number of positive storm surge events per decade. Considering all the events, the last decade (1996-2005) exhibits an average 7% increase compared to each one of the previous decades. A similar behavior was found for the decadal average of the heights of maximum annual positive storm surges. In this case the average height of the last two decades exceeds that of the previous decades by approximately 8 cm. The decadal average of maximum annual duration of these meteorological events shows an increase of 2 h in the last three decades. A possible explanation of the changes in frequency, height and duration of positive storm surges at Mar del Plata would seem to lie in the relative mean sea-level rise. © 2009 Elsevier Ltd. All rights reserved. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02784343_v29_n14_p1643_Fiore http://hdl.handle.net/20.500.12110/paper_02784343_v29_n14_p1643_Fiore |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Beach profiles Erosion Mar del Plata Sea level Storm index Storm surges beach profile erosion rate sea level change statistical analysis storm surge tidal cycle tide gauge water level Argentina Buenos Aires [Argentina] Mar del Plata South America |
| spellingShingle |
Argentina Beach profiles Erosion Mar del Plata Sea level Storm index Storm surges beach profile erosion rate sea level change statistical analysis storm surge tidal cycle tide gauge water level Argentina Buenos Aires [Argentina] Mar del Plata South America Storm surges and coastal impacts at Mar del Plata, Argentina |
| topic_facet |
Argentina Beach profiles Erosion Mar del Plata Sea level Storm index Storm surges beach profile erosion rate sea level change statistical analysis storm surge tidal cycle tide gauge water level Argentina Buenos Aires [Argentina] Mar del Plata South America |
| description |
Positive storm surges (PSS) lasting for several days can raise the water level producing significant differences between the observed level and the astronomical tide. These storm events can be more severe if they coincide with a high tide or if they bracket several tidal cycles, particularly in the case of the highest astronomical tide. Besides, the abnormal sea-level elevation near the coast can cause the highest waves generated to attack the upper beach. This combination of factors can produce severe erosion, threatening sectors located along the coastline. These effects would be more serious if the storm surge height and duration increase as a result of a climatic change. The Mar del Plata (Argentina) coastline and adjacent areas are exposed to such effects. A statistical characterization of PSS based on their intensity, duration and frequency, including a surge event classification, was performed utilizing tide-gauge records over the period 1956-2005. A storm erosion potential index (SEPI) was calculated from observed levels based on hourly water level measurements. The index was related to beach profile responses to storm events. Also, a return period for extreme SEPI values was calculated. Results show an increase in the average number of positive storm surge events per decade. Considering all the events, the last decade (1996-2005) exhibits an average 7% increase compared to each one of the previous decades. A similar behavior was found for the decadal average of the heights of maximum annual positive storm surges. In this case the average height of the last two decades exceeds that of the previous decades by approximately 8 cm. The decadal average of maximum annual duration of these meteorological events shows an increase of 2 h in the last three decades. A possible explanation of the changes in frequency, height and duration of positive storm surges at Mar del Plata would seem to lie in the relative mean sea-level rise. © 2009 Elsevier Ltd. All rights reserved. |
| title |
Storm surges and coastal impacts at Mar del Plata, Argentina |
| title_short |
Storm surges and coastal impacts at Mar del Plata, Argentina |
| title_full |
Storm surges and coastal impacts at Mar del Plata, Argentina |
| title_fullStr |
Storm surges and coastal impacts at Mar del Plata, Argentina |
| title_full_unstemmed |
Storm surges and coastal impacts at Mar del Plata, Argentina |
| title_sort |
storm surges and coastal impacts at mar del plata, argentina |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02784343_v29_n14_p1643_Fiore http://hdl.handle.net/20.500.12110/paper_02784343_v29_n14_p1643_Fiore |
| _version_ |
1768546114015854592 |