volución morfológica de la espiga de Galerazamba,  Caribe colombiano

Orejarena, Andrés Fernando; Franco, Fernando Afanador; Hoz, Isabel Ramos de La; Frías, Mario Conde; Restrepo, Juan D.

doi:10.26640/01200542.33.123_144

Cited by 2 publications

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“…Lastly, along the swamp flood plains, an abundant vegetation of Typha dominguensis was observed [38]. The swamp is partially protected by a 5 km long spit, namely, Galerazamba spit, made up of a wide beach with a gentle slope from 2 • to 5 • , which has undergone major morphological changes since its initial description by Francisco J. Fidalgo in 1805 [39][40][41]. The spit encloses inland lagoons (e.g., La Redonda) that are fed by rainfalls, as well as directly by the sea during the stormy season.…”

Section: Study Areamentioning

confidence: 99%

“…Galerazamba spit has undergone relevant morphological changes since its original description by Francisco J. Fidalgo in 1805 [39][40][41]. Anfuso et al [69] reported spit evolution from 1947 to 2013, recording an accretion of around 0.7 km 2 and a down drift (i.e., southward) migration of about 80 m. Hence, the increase in the mangrove area was directly related to the growth of the spit that enclosed numerous small lagoons, among which the larger one was La Redonda Swamp, fed by rainfalls and by the sea during stormy season [39,40]. In the period from 2013 to 2018, an increase in mangrove coverage of around 34 ha was located on the west part of the sand bar and in the southern part of the swamp (Figure 3c,d).…”

Section: Mallorquín Mangrove Swampmentioning

confidence: 99%

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Mangrove Forests Evolution and Threats in the Caribbean Sea of Colombia

Daza¹,

Moreno

Portz

et al. 2020

Water

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Colombia has approximately 379,954 hectares of mangrove forests distributed along the Pacific Ocean and the Caribbean Sea coasts. Such forests are experiencing the highest annual rate of loss recorded in South America and, in the last three decades, approximately 40,000 hectares have been greatly affected by natural and, especially, human impacts. This study determined, by the use of Landsat multispectral satellite images, the evolution of three mangrove forests located in the Colombian Caribbean Sea: Malloquín, Totumo, and La Virgen swamps. Mangrove forest at Mallorquín Swamp recorded a loss of 15 ha in the period of 1985–2018, associated with alterations in forest hydrology, illegal logging, urban growth, and coastal erosion. Totumo Swamp lost 301 ha in the period 1985–2018 associated with changes in hydrological conditions, illegal logging, and increased agricultural and livestock uses. La Virgen Swamp presented a loss of 31 ha in the period of 2013–2018 that was linked to the construction of a roadway, alterations of hydrological conditions, illegal logging, and soil urbanization, mainly for tourist purposes. Although Colombian legislation has made efforts to protect mangrove ecosystems, human activities are the main cause of mangrove degradation, and thus it is mandatory for the local population to understand the value of the ecosystem services provided by mangroves.

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Section: Study Areamentioning

confidence: 99%

Section: Mallorquín Mangrove Swampmentioning

confidence: 99%

Mangrove Forests Evolution and Threats in the Caribbean Sea of Colombia

Daza¹,

Moreno

Portz

et al. 2020

Water

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Two new conceptual models for the formation and degradation of baymouth spits by longshore drift and fluvial discharge (Iguape, SE Brazil)

Alcántara‐Carrió

Dinkel

Portz

et al. 2017

Earth Surf Processes Landf

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This study describes the formation of two successive baymouth spits systems on the south‐eastern Brazilian coast and the degradation of the first system. The study area includes the Jureia Beach spit, the deflected Ribeira de Iguape River mouth, the central Iguape sandy headland, the Icapara Inlet of the Mar Pequeno Lagoon and the northern end of the Comprida Island barrier spit. The wave and river flow patterns were combined with the coastline evolution and the alongshore migration rates deduced from satellite images. Initially, both spits showed convergent alongshore migration rates equal to or less than 83 m/yr. However, the extreme river flow due to high rainfall during a very strong El Niño event in 1983 eroded the inland side of the Jureia Beach spit, which finally retreated due to wave erosion. In 1989, a sand bank emerged in the river mouth, which attached to the central headland forming a recurved northeastward spit. In 1994, the high fluvial discharge associated with another very strong El Niño event caused the landward migration of the new spit and emersion of a second sand bank. This second sand bank merged with the Jureia Beach spit in 1997 at an alongshore migration rate of 1795.6 m/yr. Wave erosion of the central headland continued and the attached spit disappeared in 2000. In 2009, the headland erosion merged the river mouth and the Icapara Inlet, which resulted in flanking baymouth spits in a configuration that remains today. Therefore, two models for the formation of baymouth spits have been documented for wave‐dominated microtidal coasts in humid tropical regions with intense fluvial discharge. The convergent longshore migration of the spits is controlled by both the bidirectional longshore drift and the fluvial discharge, the latter eroding the fronting spit, supplying sediments and acting as a hydraulic blockage for longshore drift. Copyright © 2017 John Wiley & Sons, Ltd.

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volución morfológica de la espiga de Galerazamba, Caribe colombiano

Cited by 2 publications

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Mangrove Forests Evolution and Threats in the Caribbean Sea of Colombia

Mangrove Forests Evolution and Threats in the Caribbean Sea of Colombia

Two new conceptual models for the formation and degradation of baymouth spits by longshore drift and fluvial discharge (Iguape, SE Brazil)

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