期刊名称：International Journal of Environment and Geoinformatics
电子版ISSN：2148-9173
出版年度：2015
卷号：2
期号：1
页码：1-15
DOI：10.30897/ijegeo.303171
语种：English
出版社：IJEGEO
摘要：We studied the composition, vegetation cover, wind regime characteristics and subsurface nature of a coastaldune field on the west coast of Bozcaada Island, NW Turkey. Performing Electrical Resistivity Tomography (ERT) technique,we determined that dune sands with a thickness of ~11-13 m cover the underlying Miocenebasement, as confirmed by an abrupt increasein resistivity as from lithological boundary. The resultsdemonstrate that foredune terraces and ridges differfrom swales from various points of view. The foredune sands are characterized by average contents of over 82% medium to fine-sizedangular sands, especially quartz(85%), based on X-ray fluorescence spectroscopy (XRF) data, CaCO3 (1.15%) and organic matter (0.19%). On the other hand, swales are composed on average of59% mediumto fine sands, a mixture ofsilt and clay (13%), very coarsesands and small-size gravels (28%). In addition to the differentgrain size distribution, swale sediments have conspicuously lesser amountsof SiO2 (78%), higher amountsof CaCO3 (5.6%) and organicmatter (0.8%). Wind climatology analysis showed the predominance of a northerly(mainly NNE) near surface wind circulation over Bozcaada throughout the year with high wind speeds of maximum7.4 m/s. Nevertheless, the existing sand transportandassociated developmentof foredune forms and blowouts in the dunefield relates considerably to the bimodal distribution of northerly winds (NNW and NNE). Although the coastal dune area is cappedby a variety of dune plants, blowoutdevelopment is highly active, in particular, on the northeast section of the dunefield.
