Monitoring aeolian transport events at Sefton Dunes

Research output: Contribution to conferenceAbstract

Abstract

Despite recent advances in both coastal science and coastal management scale issues and modelling uncertainties often prove to be major constraints on communication between the two communities. Models of dune evolution provide some guidelines for best management practices but they do not analyze process dynamics, making them insufficient for predictive purposes. Ironically, despite numerous studies, researchers are still unable to provide a straightforward answer when managers asks how much sediment will be delivered to a particular coastal dune over a period of time of weeks, months, or years. The availability of new field and computer techniques has now made it possible to return to this issue, and to attempt to develop a quantitative understanding of the physical processes leading to sediment input to coastal dunes at a temporal scale that is meaningful to management (i.e., the meso-scale). Morphodynamic classifications predict general relationships between dune form and beach type and tidal range, but not detailed predictions of the rate of sediment delivery. Recent studies on a micro-tidal coast show that aeolian activity is significantly reduced during strong onshore wind events, leaving the largest percentage of sediment input to coastal dunes to medium magnitude/frequency wind events. This paper presents preliminary data from a long-term monitoring program designed to understand the nature of aeolian transport events on a macro-tidal beach-dune system. The monitoring station is located at Sefton Dunes, the largest coastal dune field in England, and includes an array of digital cameras and sensors that measure factors controlling sediment input to the dunes, such as wind and transport processes, surface moisture content, beach width and fetch distances. The working hypothesis is that the probability of strong onshore winds resulting in aeolian activity will still be reduced compared to the theoretical value and hence calculations of sediment input to coastal dunes based on wind speed and direction only will overpredict dune sediment budgets in macro-tidal coasts. The scope of the monitoring station will be expanded to include all aspects of interactions between the intertidal and beach zones and the dune system and the intention is to maintain the monitoring program over the next decade.
Original languageEnglish
Publication statusPublished - 2012
Event18th Windy Day - University of Leicester, United Kingdom
Duration: 17 Oct 2012 → …

Conference

Conference18th Windy Day
CountryUnited Kingdom
Period17/10/12 → …

Fingerprint

dune
monitoring
beach
sediment
eolian process
dune field
tidal range
fetch
sediment budget
coast
morphodynamics
best management practice
coastal zone management
transport process
wind direction
moisture content
wind velocity
communication
sensor
prediction

Cite this

Delgado-Fernandez, I. (2012). Monitoring aeolian transport events at Sefton Dunes. Abstract from 18th Windy Day, United Kingdom.
Delgado-Fernandez, Irene. / Monitoring aeolian transport events at Sefton Dunes. Abstract from 18th Windy Day, United Kingdom.
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abstract = "Despite recent advances in both coastal science and coastal management scale issues and modelling uncertainties often prove to be major constraints on communication between the two communities. Models of dune evolution provide some guidelines for best management practices but they do not analyze process dynamics, making them insufficient for predictive purposes. Ironically, despite numerous studies, researchers are still unable to provide a straightforward answer when managers asks how much sediment will be delivered to a particular coastal dune over a period of time of weeks, months, or years. The availability of new field and computer techniques has now made it possible to return to this issue, and to attempt to develop a quantitative understanding of the physical processes leading to sediment input to coastal dunes at a temporal scale that is meaningful to management (i.e., the meso-scale). Morphodynamic classifications predict general relationships between dune form and beach type and tidal range, but not detailed predictions of the rate of sediment delivery. Recent studies on a micro-tidal coast show that aeolian activity is significantly reduced during strong onshore wind events, leaving the largest percentage of sediment input to coastal dunes to medium magnitude/frequency wind events. This paper presents preliminary data from a long-term monitoring program designed to understand the nature of aeolian transport events on a macro-tidal beach-dune system. The monitoring station is located at Sefton Dunes, the largest coastal dune field in England, and includes an array of digital cameras and sensors that measure factors controlling sediment input to the dunes, such as wind and transport processes, surface moisture content, beach width and fetch distances. The working hypothesis is that the probability of strong onshore winds resulting in aeolian activity will still be reduced compared to the theoretical value and hence calculations of sediment input to coastal dunes based on wind speed and direction only will overpredict dune sediment budgets in macro-tidal coasts. The scope of the monitoring station will be expanded to include all aspects of interactions between the intertidal and beach zones and the dune system and the intention is to maintain the monitoring program over the next decade.",
author = "Irene Delgado-Fernandez",
year = "2012",
language = "English",
note = "18th Windy Day ; Conference date: 17-10-2012",

}

Delgado-Fernandez, I 2012, 'Monitoring aeolian transport events at Sefton Dunes' 18th Windy Day, United Kingdom, 17/10/12, .

Monitoring aeolian transport events at Sefton Dunes. / Delgado-Fernandez, Irene.

2012. Abstract from 18th Windy Day, United Kingdom.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Monitoring aeolian transport events at Sefton Dunes

AU - Delgado-Fernandez, Irene

PY - 2012

Y1 - 2012

N2 - Despite recent advances in both coastal science and coastal management scale issues and modelling uncertainties often prove to be major constraints on communication between the two communities. Models of dune evolution provide some guidelines for best management practices but they do not analyze process dynamics, making them insufficient for predictive purposes. Ironically, despite numerous studies, researchers are still unable to provide a straightforward answer when managers asks how much sediment will be delivered to a particular coastal dune over a period of time of weeks, months, or years. The availability of new field and computer techniques has now made it possible to return to this issue, and to attempt to develop a quantitative understanding of the physical processes leading to sediment input to coastal dunes at a temporal scale that is meaningful to management (i.e., the meso-scale). Morphodynamic classifications predict general relationships between dune form and beach type and tidal range, but not detailed predictions of the rate of sediment delivery. Recent studies on a micro-tidal coast show that aeolian activity is significantly reduced during strong onshore wind events, leaving the largest percentage of sediment input to coastal dunes to medium magnitude/frequency wind events. This paper presents preliminary data from a long-term monitoring program designed to understand the nature of aeolian transport events on a macro-tidal beach-dune system. The monitoring station is located at Sefton Dunes, the largest coastal dune field in England, and includes an array of digital cameras and sensors that measure factors controlling sediment input to the dunes, such as wind and transport processes, surface moisture content, beach width and fetch distances. The working hypothesis is that the probability of strong onshore winds resulting in aeolian activity will still be reduced compared to the theoretical value and hence calculations of sediment input to coastal dunes based on wind speed and direction only will overpredict dune sediment budgets in macro-tidal coasts. The scope of the monitoring station will be expanded to include all aspects of interactions between the intertidal and beach zones and the dune system and the intention is to maintain the monitoring program over the next decade.

AB - Despite recent advances in both coastal science and coastal management scale issues and modelling uncertainties often prove to be major constraints on communication between the two communities. Models of dune evolution provide some guidelines for best management practices but they do not analyze process dynamics, making them insufficient for predictive purposes. Ironically, despite numerous studies, researchers are still unable to provide a straightforward answer when managers asks how much sediment will be delivered to a particular coastal dune over a period of time of weeks, months, or years. The availability of new field and computer techniques has now made it possible to return to this issue, and to attempt to develop a quantitative understanding of the physical processes leading to sediment input to coastal dunes at a temporal scale that is meaningful to management (i.e., the meso-scale). Morphodynamic classifications predict general relationships between dune form and beach type and tidal range, but not detailed predictions of the rate of sediment delivery. Recent studies on a micro-tidal coast show that aeolian activity is significantly reduced during strong onshore wind events, leaving the largest percentage of sediment input to coastal dunes to medium magnitude/frequency wind events. This paper presents preliminary data from a long-term monitoring program designed to understand the nature of aeolian transport events on a macro-tidal beach-dune system. The monitoring station is located at Sefton Dunes, the largest coastal dune field in England, and includes an array of digital cameras and sensors that measure factors controlling sediment input to the dunes, such as wind and transport processes, surface moisture content, beach width and fetch distances. The working hypothesis is that the probability of strong onshore winds resulting in aeolian activity will still be reduced compared to the theoretical value and hence calculations of sediment input to coastal dunes based on wind speed and direction only will overpredict dune sediment budgets in macro-tidal coasts. The scope of the monitoring station will be expanded to include all aspects of interactions between the intertidal and beach zones and the dune system and the intention is to maintain the monitoring program over the next decade.

UR - http://www2.le.ac.uk/departments/geography/windydays2012

M3 - Abstract

ER -

Delgado-Fernandez I. Monitoring aeolian transport events at Sefton Dunes. 2012. Abstract from 18th Windy Day, United Kingdom.