El-Fishawi Nabil M.; El-Askary M. A.: Characteristic features of coastal sand dunes along Burullus-Gamasa stretch, Egypt. In: Acta mineralogica-petrographica, (25) 1. pp. 63-76. (1981)
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Absztrakt (kivonat)
Coastal sand dunes play an important protective role due to recent severe erosion along Nile Delta coast, especially in areas where the backshore is low-lying. The study performed in this research illustrates the results of the work carried out on the coastal sand dunes to put a body of basic data to be used in coast protection. Between Burullus outlet and Gamasa drain, the main geomorphological features of coastal sand dunes are discussed on the basis of dune type, origin, modification, wind velocities, wind ripples, internal structure and dune vegetation. Along Burullus outlet-Kitchener drain stretch, grain size relationship between coastal sand dunes and beach sands have been studied on light of sand transport by onshore wind action. It is found that there is a fining grain size cycle from the beach, throughout the bottom and up to the top of dune sands. There is a sympathetic relationship between grain size peaks of beach and dune sands. The field can be described as being under dominantly unidirectional wind control from WNW and NW. An attempt was made to differentiate between the two populations of sorting occurred in coastal dune sands. The differentiation depends upon grain size distribution curves, statistical parameters and scatter diagrams. Top of dune sands are finer, more sorted, slightly positive skewed and has lower kurtosis values than the bottom sands. Internal structure of barchan dune studied by making three .cuts in the windward side, 1 eeward side and in the barchan horn. The three types of stratification can be differentiated depending upon angle of dip and thickness of lamina.
| Mű típusa: | Cikk, tanulmány, mű |
|---|---|
| Befoglaló folyóirat/kiadvány címe: | Acta mineralogica-petrographica |
| Dátum: | 1981 |
| Kötet: | 25 |
| Szám: | 1 |
| ISSN: | 0365-8066 |
| Oldalak: | pp. 63-76 |
| Nyelv: | angol |
| Kiadó: | University of Szeged, Department of Mineralogy, Geochemistry and Petrology |
| Kiadás helye: | Szeged |
| Befoglaló mű URL: | http://acta.bibl.u-szeged.hu/39401/ |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Megjegyzések: | Bibliogr.: p. 75-76. ; ill. ; összefoglalás angol nyelven |
| Szakterület: | 01. Természettudományok 01. Természettudományok > 01.05. Föld- és kapcsolódó környezettudományok |
| Feltöltés dátuma: | 2016. okt. 17. 09:25 |
| Utolsó módosítás: | 2022. júl. 25. 15:13 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/24687 |
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