Beach-dune morphological relationships and erosion/accretion: An investigation at five sites in England and Wales using LIDAR data

被引：161

作者：

Saye, SE

van der Wal, D

Pye, K

Blott, SJ

机构：

[1] Kenneth Pye Associates Ltd, Crowthorne Enterprise Ctr, Crowthorne RG45 6AW, Berks, England

[2] CEMO, NIOO, Ctr Estuarine & Coastal Ecol, NL-4400 AC Yerseke, Netherlands

来源：

GEOMORPHOLOGY | 2005年 / 72卷 / 1-4期

关键词：

LIDAR; coastal dunes; beach-dune interaction; erosion; morphology;

D O I：

10.1016/j.geomorph.2005.05.007

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

The critical relationships between beach and nearshore parameters and the erosion/accretion status of frontal dunes have been investigated using LIDAR data, complemented by data obtained from conventional topographic and bathymetric surveys, at five dune systems in England and Wales. Morphometric parameters calculated from the LIDAR data demonstrate the presence of a general relationship between beach morphology, dune morphology and erosion/accretion. Eroding dunes were found to be associated with narrower, steeper beaches whilst accreting dunes were associated with wider, low-angle beaches. However, the critical beach width/mean slope angle separating eroding dunes from stable or accreting dunes was found to vary between sites. At any given site, changes in beach width/slope over time can be used to provide an 'early warning' of changes in frontal dune erosion/accretion behaviour. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：128 / 155

页数：28