Assessment of highly active dune mobility in the medium, short and very short term

Navarro, Marina; Muñoz-Pérez, Juan J.; Román-Sierra, Jorge; Tsoar, Haim; Rodríguez, Inmaculada; Gómez-Pina, Gregorio

doi:10.1016/j.geomorph.2011.01.009

Cited by 16 publications

(9 citation statements)

References 35 publications

(49 reference statements)

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“…Authors interpret, that the relative differences of this dune sediments must result from (1) diminishing of garnet, (2) removal of heavy minerals with a lower resistance to chemical weathering, and (3) depletion into an ultrastable assemblages. Assuming that not only active phases but also stabilization events interplay in aeolian environment (Navarro et al 2011;Tsoar 2005), the Łysobyki site may represent cessation of aeolian activity. Similar HM record, displaying relatively high content of amphiboles (up to 36%) and comparable ZTR index, was observed in dune sediments east of Warsaw and assigned with soil processes (Konecka-Betley, Janowska 2005).…”

Section: Dunesmentioning

confidence: 99%

Heavy-mineral derived provenance study of Quaternary sediments of the Mazovian Lowland, Central Poland

Kalińska¹,

Nartišs²

2017

Baltica

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This study makes an attempt to characterise Quaternary sediments in terms of their heavy minerals (HM) composition. Authors focus on the Mazovian Lowland, Central Poland, where a number of clastic sediments of different age and origin overlap. Five sedimentary settings, covering the Saalian-Holocene (MIS 1-6) time frame, have been studied to reveal whether these sediments have single or multiple source areas and to decipher sediment transformations. In the glacial setting either garnet-or amphibole-dominated sediments occur. This unequivocal mineral combination likely reflects a multi-sourcing resulting from multi-directional ice advance. The HM taken from fan-like forms and aeolian sediments are closely related; these sediments are largely multicyclic and likely derived from pre-existing recycling sediments. Similar mineral suite is also typical for long-lasting aeolian processes and is observed in dune sediments. Ultrastable components are less frequent in the coversand, which points at a shorter-lived aeolian process. Finally, the fluvial setting reveals multi-sourcing largely depending on local geological conditions.

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Section: Dunesmentioning

confidence: 99%

Heavy-mineral derived provenance study of Quaternary sediments of the Mazovian Lowland, Central Poland

Kalińska¹,

Nartišs²

2017

Baltica

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“…Easterly and westerly winds include more than 90% of the wind speeds greater than 10 m s -1 (Plomaritis et al 2013). More specific wind information is available at Navarro et al (2011Navarro et al ( , 2015.…”

Section: Features Of the Dune Environmentmentioning

confidence: 99%

Evidence of coastal dune mobility increases over the last half century in response to historical human intervention

et al. 2016

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Summary:Given the risk of two roads being buried by the sand of two highly mobile coastal dunes (Valdevaqueros and Bolonia, SW Spain), several measures have been taken over the last half century in order to stabilize them or at least slow their progress: installation of several rows of 1-m-high concrete structures, planting of species such as Pinus pinea, Retama monosperma and Ammophila arenaria, wicker and wooden fencing, and sand mining (only performed on the Valdevaqueros dunefield). The evolution of the two dunes was investigated through the interpretation of intensive topographical monitoring and aerial photography. Average migration rates of approximately 10 m yr -1 were detected and the burial of anthropic structures has eventually occurred. This process has caused a serious regional problem, making dune management of these areas a difficult challenge. The comparison of the evolution of these two dunes has been of great importance in assessing the effect of historical human intervention and has provided a new perspective for future dune management strategies. The results obtained show that management measures based on sand removal have been proven to be unsustainable. Moreover, the monitoring methodology presented herein has proven very useful in predicting dune advance rates. For instance, the Bolonia dune could reach the nearest road in approximately 12 years.Keywords: coastal dunes, dune mobility; aeolian transport rate; topographic monitoring; aerial photography; dune management; dune evolution.Evidencias del incremento en la movilidad de dunas costeras en el último medio siglo como respuesta a la intervención humana Resumen: Se han tomado diferentes medidas a lo largo del último medio siglo tratando de estabilizar o al menos ralentizar el progreso de dos dunas costeras de alta movilidad (Valdevaqueros y Bolonia, SW España) dado el riesgo de enterramiento de sendas carreteras: Entre las medidas tomadas cabe destacar la instalación de filas de estructuras de hormigón de 1 m de altura, la plantación de diferentes especies (como el Pinus pinea, la Retama monosperma o la Ammophila arenaria), vallas de madera y brezo, y la extracción de arena (sólo en la duna de Valdevaqueros). La evolución de ambas dunas se ha investigado a través de la comparación de levantamientos topográficos y fotografías aéreas. Se han detectado tasas medias de avance de aproximadamente 10 m/año hasta que, finalmente, se han enterrado estructuras antrópicas. Este proceso ha causado graves problemas convirtiendo en un difícil reto la gestión de dunas de estas áreas. La comparación de la evolución de estas dos dunas ha resultado de gran importancia a la hora de evaluar el efecto de la intervención humana, y ha proporcionado una nueva perspectiva para las futuras estrategias de gestión. Entre los resultados obtenidos, debería destacarse el que la gestión basada en la retirada de arena ha resultado insostenible. Además, la metodología de seguimiento aquí presentada ha probado ser de gran utilidad al predecir las tasas de avance de las du...

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“…1). The beach samples were col-lected at Victoria beach (Cadiz) and Valdevaqueros beach (Tarifa), the dune samples on the highly mobile transverse dune system at Valdevaqueros, which has one of the highest aeolian sand transport capacities in Europe (Muñ oz-Perez et al, 2009;Navarro et al, 2011).…”

Section: Study Areamentioning

confidence: 99%

Influence of sieving time on the efficiency and accuracy of grain‐size analysis of beach and dune sands

2013

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Grain size is a fundamental property of sediments and is commonly used to describe sedimentary facies and classify sedimentary environments. Among the various conventional techniques utilized to determine grain-size frequency distributions, sieving is the most widely applied procedure. The accuracy of such analyses is, among other factors, strongly dependent on the sieving time. However, despite a substantial amount of research in this field, optimal sieving times for different types of sediments have, to date, not been established. In this article, the influence of sieving time on grain-size analyses of medium-grained microtidal and mesotidal beach and dune sands has been determined. To assess the precision of important textural parameters, such as median grain size, sorting, skewness and kurtosis, an error analysis was carried out for different sieving times (2, 5, 10, 15 and 20 minutes). After calibrating the analytical and sampling methodologies, significant deviations were registered when sieving time was less than 10 minutes. However, such deviations were very small and grain-size distributions remained almost identical for sieving times of 10 minutes and longer, relative errors being as low as 0% in some cases.

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Assessment of highly active dune mobility in the medium, short and very short term

Cited by 16 publications

References 35 publications

Heavy-mineral derived provenance study of Quaternary sediments of the Mazovian Lowland, Central Poland

Heavy-mineral derived provenance study of Quaternary sediments of the Mazovian Lowland, Central Poland

Evidence of coastal dune mobility increases over the last half century in response to historical human intervention

Influence of sieving time on the efficiency and accuracy of grain‐size analysis of beach and dune sands

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