Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Beach cusps and beach dynamics: A quantitative field appraisal
Abstract The physical expression of beach cusps during the process of beach dynamics defines the objective of this report. A total of 93, largely fortnightly, volumetric beach change observations under cusp existence and extinction phases have been employed for this purpose. The above data were assessed alongside existing information on linear beach changes during both cusp phases from the study area. The study area is a 3 km long, moderate-high energy sandy beach fringing the southeast Atlantic coast of Nigeria. In the main, cusps are prone to develop during milder coastal conditions. In relation to the three principal beach states (dissipative, intermediate and reflective) cusp formation and persistence were most significant on beach sectors exhibiting reflective process signatures. However, in contrast to previous postulates, cusp development and disappearance phases did not reveal any unique relationship with the direction of volumetric beach change. The cusp phases correspond better with linear beach changes. Between 90–95% of the volumetric accretionary events during both cusp phases progressed through beach response routes characterized by beach scarp stability. Erosional events indicated a wider spread of response routes. It is asserted that on dissipative beaches, cusps play a passive role in the overall process of volumetric profile adjustment. The converse may be the case on highly reflective beaches.
Beach cusps and beach dynamics: A quantitative field appraisal
Abstract The physical expression of beach cusps during the process of beach dynamics defines the objective of this report. A total of 93, largely fortnightly, volumetric beach change observations under cusp existence and extinction phases have been employed for this purpose. The above data were assessed alongside existing information on linear beach changes during both cusp phases from the study area. The study area is a 3 km long, moderate-high energy sandy beach fringing the southeast Atlantic coast of Nigeria. In the main, cusps are prone to develop during milder coastal conditions. In relation to the three principal beach states (dissipative, intermediate and reflective) cusp formation and persistence were most significant on beach sectors exhibiting reflective process signatures. However, in contrast to previous postulates, cusp development and disappearance phases did not reveal any unique relationship with the direction of volumetric beach change. The cusp phases correspond better with linear beach changes. Between 90–95% of the volumetric accretionary events during both cusp phases progressed through beach response routes characterized by beach scarp stability. Erosional events indicated a wider spread of response routes. It is asserted that on dissipative beaches, cusps play a passive role in the overall process of volumetric profile adjustment. The converse may be the case on highly reflective beaches.
Beach cusps and beach dynamics: A quantitative field appraisal
Antia, Effiom Edem (Autor:in)
Coastal Engineering ; 13 ; 263-272
25.01.1989
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| ASCE | 2006
| British Library Conference Proceedings | 2005
A predictive relationship for the spacing of beach cusps in nature
Online Contents | 2004
A predictive relationship for the spacing of beach cusps in nature
| Elsevier | 2004