The influence of groundwater depth on coastal dune development at sand flats close to inlets

Silva, Filipe Galiforni; Wijnberg, Kathelijne Mariken; Groot, A.V. de; Hulscher, Suzanne J.M.H.

doi:10.1007/s10236-018-1162-8

Cited by 22 publications

(35 citation statements)

References 35 publications

(54 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yes 84 422 No 93 524 Table 6 shows that even though during onshore wind conditions with wind speeds above 7 m/s, still 55% of the time transport was not observed. This can be related to water level variation which influences the groundwater level and therefore, the moisture content of the surface [52][53][54][55]. Figure 16 presents the cumulative distribution of water levels and wind speeds for the cases presented in Table 6.…”

Section: Transport Imagesmentioning

confidence: 99%

Estimating Annual Onshore Aeolian Sand Supply from the Intertidal Beach Using an Aggregated-Scale Transport Formula

Duarte-Campos

Wijnberg

Hulscher

2018

JMSE

View full text Add to dashboard Cite

In this paper, we explore an approach for annual-scale transport prediction from the intertidal beach, in which we aggregate the surface conditions of the intertidal beach, in particular moisture content and roughness, and use hourly monitoring data of wind speed and wind direction. For our case study area (Egmond Beach, The Netherlands), we include Argus video imagery in our analysis to assess the occurrence of aeolian sand transport. With the approach described to determine a characteristic moisture content value for aeolian transport, we obtained surface moisture values of 1.2% to 3.2% for wind average and wind gust respectively, implying that we need a quite dry beach. This indicates that the main area for aeolian transport corresponds to the upper part of the intertidal source, most likely the region between mean high tide line and spring high tide line.

show abstract

Section: Transport Imagesmentioning

confidence: 99%

Estimating Annual Onshore Aeolian Sand Supply from the Intertidal Beach Using an Aggregated-Scale Transport Formula

Duarte-Campos

Wijnberg

Hulscher

2018

JMSE

View full text Add to dashboard Cite

show abstract

“…Key requirements for the development of coastal dunes are the availability of sediment, space for dune growth, suitable climate conditions (e.g. wind, waves, vegetation, and rain) and time for its development (Hesp, 1983(Hesp, , 2002Bochev-van der Burgh et al, 2009;Bauer et al, 2009;Bochev-van der Burgh et al, 2011;Keijsers et al, 2015;van Puijenbroek et al, 2017;Galiforni-Silva et al, 2018, 2019.…”

Section: Introductionmentioning

confidence: 99%

Storm-induced sediment supply to coastal dunes on sand flats

2020

Self Cite

View full text Add to dashboard Cite

Abstract. Growth of coastal dunes requires a marine supply of sediment. Processes that control the sediment transfer between the subtidal and the supratidal zone are not fully understood, especially in sand flats close to inlets. It is hypothesised that storm surge events induce sediment deposition on sand flats, providing fresh material for aeolian transport and dune growth. The objective of this study is to identify which processes cause deposition on the sand flat during storm surge conditions and discuss the relationship between the supratidal deposition and sediment supply to the dunes. We use the island of Texel (NL) as a case study, of which multiannual topographic and hydrographic datasets are available. Additionally, we use the numerical model XBeach to simulate the most frequent storm surge events for the area. Results show that supratidal shore-parallel deposition of sand occurs in both the numerical model and the topographic data. The amount of sand deposited is directly proportional to surge level and can account for more than a quarter of the volume deposited at the dunes yearly. Furthermore, storm surges are also capable of remobilising the top layer of sediment of the sand flat, making fresh sediment available for aeolian transport. Therefore, in a sand flat setting, storm surges have the potential of reworking significant amounts of sand for aeolian transport in periods after the storm and as such can also play a constructive role in coastal dune development.

show abstract

“…Although the elevation stability of most of the supra-tidal zone of the sand flat, together with no growth trend related to the depositional ridge, hints at such possibility, the main process that might lead to such limitation of the zone to act as a sediment source remains unclear. Silva et al (2018) shows that spatial variation in groundwater depth along the sand flat induces variations in sediment supply to the dunes, which may lead to an overall limitation of the sand flat to act as a source in the long-term. Hoonhout and de Vries (2017) suggested that in a mega-nourishment setting, wind transport would lead to a sorting process of the sediments at the beach surface that, within a certain period of time, would induce an armouring effect that could reduce the potential of the sediment surface to act as a sediment source.…”

mentioning

confidence: 99%

Storm-induced sediment supply to coastal dunes on sand flats

Silva¹,

Wijnberg²,

Hulscher³

2020

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Growth of coastal dunes requires a marine supply of sediment. Processes that control the sediment transfer between the sub-tidal and the supra-tidal zone are not fully understood, especially in sand flats close to inlets. It is hypothesised that storm surge events induce sediment deposition on sand flats, providing fresh material for aeolian transport and dune growth. The objective of this study is to identify which processes cause deposition on the sand flat during storm surge conditions and discuss the relationship between the supra-tidal deposition and sediment supply to the dunes. We use the island of Texel as a case study, of which multi-annual topographic and hydrographic data sets are available. Additionally, we use the numerical model XBeach to simulate the most frequent storm surge events for the area. Results show that supra-tidal shore-parallel deposition of sand occurs in both the numerical model and the topographic data. The amount of sand deposition is directly proportional to surge level and can account for more than a quarter of the volume deposited at the dunes yearly. Furthermore, storm surges are also capable of remobilising the top layer of sediment of the sand flat, making fresh sediment available for aeolian transport. Therefore, in a sand flat setting, storm surges have the potential of reworking significant amounts of sand for aeolian transport in periods after the storm, and as such can also play a constructive role in coastal dune development.

show abstract

The influence of groundwater depth on coastal dune development at sand flats close to inlets

Cited by 22 publications

References 35 publications

Estimating Annual Onshore Aeolian Sand Supply from the Intertidal Beach Using an Aggregated-Scale Transport Formula

Estimating Annual Onshore Aeolian Sand Supply from the Intertidal Beach Using an Aggregated-Scale Transport Formula

Storm-induced sediment supply to coastal dunes on sand flats

Storm-induced sediment supply to coastal dunes on sand flats

Contact Info

Product

Resources

About