Abstract
Topographic field data and environmental forcing agents were used to assess morphological changes (1995-2010) at Ginst Spit, Pendine Sands, West Wales and flood potential at Laugharne, a town in the lee of the spit. Areal change between annual surveys showed variable distal end migration eastward extending into the channel of the Towy, Taf and Gwendreath estuaries. Dominant waves emanate from south toward southwest and suggest that the longshore sediment drift is from west toward east. However, sub-dominant waves from southeast are limited by fetch but engender a counter drift back toward the west at the distal end forming the customary northward hook.Wave model results showed significant modifications occurred between the inshore model boundary and the nearshore zone and overall results suggest that spit evolution is dependent on sediment movement that occurs during high spring tidal conditions within this macrotidal environment. Precipitation and flood events were correlated to spit evolution, which suggested that a combination of fluvial and coastal processes in combination contribute to the flooding of Laugharne town.
| Original language | English |
|---|---|
| Pages (from-to) | 72-77 |
| Number of pages | 6 |
| Journal | Journal of Coastal Research |
| Volume | 70 |
| DOIs | |
| Publication status | Published - Apr 2014 |
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Keywords
- inland flooding
- precipitation
- Sand spit evolution
- wave models
Cite this
}
Relationships between sand spit evolution, environmental forcing and inland inundation. / Thomas, Tony; Lynch, Shaun K.; Phillips, Michael R.; Williams, Allan T.; Duck, Robert W. (Lead / Corresponding author).
In: Journal of Coastal Research, Vol. 70, 04.2014, p. 72-77.Research output: Contribution to journal › Article
TY - JOUR
T1 - Relationships between sand spit evolution, environmental forcing and inland inundation
AU - Thomas, Tony
AU - Lynch, Shaun K.
AU - Phillips, Michael R.
AU - Williams, Allan T.
AU - Duck, Robert W.
PY - 2014/4
Y1 - 2014/4
N2 - Topographic field data and environmental forcing agents were used to assess morphological changes (1995-2010) at Ginst Spit, Pendine Sands, West Wales and flood potential at Laugharne, a town in the lee of the spit. Areal change between annual surveys showed variable distal end migration eastward extending into the channel of the Towy, Taf and Gwendreath estuaries. Dominant waves emanate from south toward southwest and suggest that the longshore sediment drift is from west toward east. However, sub-dominant waves from southeast are limited by fetch but engender a counter drift back toward the west at the distal end forming the customary northward hook.Wave model results showed significant modifications occurred between the inshore model boundary and the nearshore zone and overall results suggest that spit evolution is dependent on sediment movement that occurs during high spring tidal conditions within this macrotidal environment. Precipitation and flood events were correlated to spit evolution, which suggested that a combination of fluvial and coastal processes in combination contribute to the flooding of Laugharne town.
AB - Topographic field data and environmental forcing agents were used to assess morphological changes (1995-2010) at Ginst Spit, Pendine Sands, West Wales and flood potential at Laugharne, a town in the lee of the spit. Areal change between annual surveys showed variable distal end migration eastward extending into the channel of the Towy, Taf and Gwendreath estuaries. Dominant waves emanate from south toward southwest and suggest that the longshore sediment drift is from west toward east. However, sub-dominant waves from southeast are limited by fetch but engender a counter drift back toward the west at the distal end forming the customary northward hook.Wave model results showed significant modifications occurred between the inshore model boundary and the nearshore zone and overall results suggest that spit evolution is dependent on sediment movement that occurs during high spring tidal conditions within this macrotidal environment. Precipitation and flood events were correlated to spit evolution, which suggested that a combination of fluvial and coastal processes in combination contribute to the flooding of Laugharne town.
KW - inland flooding
KW - precipitation
KW - Sand spit evolution
KW - wave models
UR - http://www.scopus.com/inward/record.url?scp=84952326489&partnerID=8YFLogxK
U2 - 10.2112/SI70-013.1
DO - 10.2112/SI70-013.1
M3 - Article
VL - 70
SP - 72
EP - 77
JO - Journal of Coastal Research
JF - Journal of Coastal Research
SN - 0749-0208
ER -