The effect of building geometry on the size of aeolian deposition patterns: Scale model experiments at the beach

Poppema, Daan Willem; Wijnberg, Kathelijne Mariken; Mulder, Jan; Vos, Sander; Hulscher, Suzanne J.M.H.

doi:10.1016/j.coastaleng.2021.103866

Cited by 13 publications

(45 citation statements)

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“…(Nordstrom and McCluskey, 1984). This creates deposition a small distance upwind of the building (Jackson and Nordstrom, 2011;Poppema et al, 2021b), similar to echo dunes upwind of natural cliffs (Tsoar, 1983;Tsoar and Blumberg, 1991). Downwind deposition occurs in two tails, following the shape of the horseshoe vortex (Poppema et al, 2019;Poppema et al, 2021b).…”

Section: Introductionmentioning

confidence: 99%

“…Buildings act as obstacles to the wind, thereby changing the wind field and creating complicated airflow patterns (Hunt, 1971;Peterka et al, 1985). In sandy environments, such as deserts, beaches and dunes, these airflow patterns affect aeolian sediment transport, creating patterns of deposition and erosion (Nordstrom and McCluskey, 1984;Poppema et al, 2021b). This can pose problems, if for instance walkways or buildings entrances get blocked by building-induced deposition (Nordstrom and Jackson, 1998;Jackson and Nordstrom, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Although these morphological effects have long been recognized, systematic research into the deposition around buildings and how this depends on building characteristics is still in its infancy. In a recent study, we placed cuboid scale models at the beach to study how building geometry affects the size of aeolian deposition areas (Poppema et al, 2021b). The depositional areas that developed were up to an order of magnitude larger than the horizontal building dimensions, and deposition size was found to depend on a building's width perpendicular to the wind and its height.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, this study aims to determine how the initial morphological patterns around buildings at a sandy beach are affected by building spacing and by a building's orientation relative to the wind. Hereto, as follow-up to the study of Poppema et al (2021b), a new series of three experiments was performed, in which scale models of buildings were placed at the beach surface for a day and resulting deposition patterns were measured. The focus of this study is on deposition rather than erosion, because previous experiments showed deposition as the dominant building effect (Poppema et al, 2021b).…”

Section: Introductionmentioning

confidence: 99%

“…Hereto, as follow-up to the study of Poppema et al (2021b), a new series of three experiments was performed, in which scale models of buildings were placed at the beach surface for a day and resulting deposition patterns were measured. The focus of this study is on deposition rather than erosion, because previous experiments showed deposition as the dominant building effect (Poppema et al, 2021b). The area and volume of deposition are usually larger than that of erosion, with deposition occurring over a larger area, both upwind and downwind of a building, while erosion is mostly limited to the area directly along the building front and sides, where local wind acceleration scours the bed.…”

Section: Introductionmentioning

confidence: 99%

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Deposition patterns around buildings at the beach: Effects of building spacing and orientation

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deposition patterns around buildings at the beach: Effects of building spacing and orientation

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Foredune responses to the impact of aggregate extraction in an arid aeolian sedimentary system

Sanromualdo-Collado

Marrero-Rodríguez

García‐Romero

et al. 2022

Earth Surf Processes Landf

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Coastal dunes have long suffered the effects of human interventions that have altered the landscape and operation of these ecosystems. Aggregate extractions have been shown to modify the biogeomorphological processes in aeolian sedimentary systems. The impacts associated to aggregate extraction include the reduction of available sediment and changes to the topography and vegetation patterns, thereby altering the sedimentary dynamics and limiting the recovery capacity of the dunefield. The aim of this article is to analyse the environmental effects produced by historical aggregate extraction in the foredune area of an arid aeolian sedimentary system (El Médano, Tenerife, Spain) through a study of the airflow dynamics and spatial distribution of vegetation, sediment and topographic changes. The methodology was designed with two temporal scales: (i) a long‐term approach which compares historical sources and current ones; (ii) a short‐term approach through experimental data collection to characterize the present functioning. For the latter, a field study was carried out in June 2021, collecting wind speed and direction data at a height of 0.50 m, sediment data (sand sheet thickness, grain size and sorting), and vegetation data (cover and species richness) at 40 sample points. The main results show that when the anthropic stress ceased the foredune did not follow a natural environmental pattern, and that the way it functions at the present time is determined by the changes induced by the aggregate extraction. Changes include alterations to the topography, the creation of a lagoon, and the generation of an aeolian deflation area and flow acceleration zones with the associated sand transport. This research contributes to an understanding of the environmental consequences of aggregate extractions on the foredunes of arid aeolian sedimentary systems and can enable the relevant authorities to make better‐informed decisions that help the management of these ecosystems.

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Dune toe dynamics along the urbanised macro‐tidal coast of Belgium

Strypsteen

Dan

Verwaest

et al. 2023

Earth Surf Processes Landf

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The dynamics of the dune toe along the urbanised 65 km macro‐tidal coast of Belgium has been examined based on (bi‐)annual cross‐shore profiles derived from airborne LiDAR surveys conducted between 2000 and 2019. Results indicate that the average dune toe level is located at +5.9 m Tweede Algemene Waterpassing (TAW, Belgian Ordnance Datum), which is 1 m lower than the conventional dune toe level. However, this level is not static but rather increasing over time with an average rate of 2.3 cm/year, making it comparable with coastal areas along western Europe. Both landward retreat and seaward progradation of the dune toes are observed, with rates up to 2 m/year. The analysis revealed that dune growth is primarily facilitated by the development of incipient or embryonic dunes, new foredunes and modifications to the stoss slope of the original dune profile. Half of the sea‐fronting dunes were observed to be developed by brushwood fences, which had a positive effect on dune growth. At some locations, incipient dune development and shoreline progradation were observed seaward of old foredunes. Other dune regions were characterised by natural dune blowouts and management activities for recreational purposes. Dune toe reinforcements were implemented in the west to stabilise the dune toe and prevent erosion by waves. However, it was noted that if the adjacent beach accreted because of natural growth or periodic nourishment, incipient dunes could form in front of the reinforcement.

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The effect of building geometry on the size of aeolian deposition patterns: Scale model experiments at the beach

Cited by 13 publications

References 44 publications

Deposition patterns around buildings at the beach: Effects of building spacing and orientation

Deposition patterns around buildings at the beach: Effects of building spacing and orientation

Foredune responses to the impact of aggregate extraction in an arid aeolian sedimentary system

Dune toe dynamics along the urbanised macro‐tidal coast of Belgium

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