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Flygsanddyners inre uppbyggnad : georadarundersökning

El Ali, Mohammad LU (2016) In Examensarbeten i Geologi vid Lunds universitet GEOL01 20161
Department of Geology
Abstract (Swedish)
Sanddyner är landformer som bildas av vinden. Deras inre uppbyggnad utgörs av korslagringar och begränsningsytor som kan ge väsentlig information om det lokala klimatet och miljön vid dynernas bildning. Georadarundersökning som är en snabb, enkel och ickedestruktiv reflektionsmetod, ger en god bild av sanddynernas inre struktur eftersom korslagringar och begränsningsytor ger upphov till reflektorer som kan studeras i erhållna radargram. Med georadar får man en bra djupnedträngning i sanddyner på grund av att sanden har låg konduktivitet och magnetisk permeabilitet. Bonäsheden, som är ett flygsandsfält, ligger i Mora kommun i Dalarnas län och har bedömts vara en lämplig lokal för georadarundersökningar. Resultatet av min undersökning visar... (More)
Sanddyner är landformer som bildas av vinden. Deras inre uppbyggnad utgörs av korslagringar och begränsningsytor som kan ge väsentlig information om det lokala klimatet och miljön vid dynernas bildning. Georadarundersökning som är en snabb, enkel och ickedestruktiv reflektionsmetod, ger en god bild av sanddynernas inre struktur eftersom korslagringar och begränsningsytor ger upphov till reflektorer som kan studeras i erhållna radargram. Med georadar får man en bra djupnedträngning i sanddyner på grund av att sanden har låg konduktivitet och magnetisk permeabilitet. Bonäsheden, som är ett flygsandsfält, ligger i Mora kommun i Dalarnas län och har bedömts vara en lämplig lokal för georadarundersökningar. Resultatet av min undersökning visar att dynerna i området har korslagringar som lutar mot sydöst. Detta indikerar dynmigration mot sydöst och att dynerna blev transverst skillnader i lutningen. Det rekommenderas att georadarprofilering bör kompletteras med grävningar för mer exakta tolkningar av dynernas uppbyggnad. (Less)
Abstract
Dunes are landforms formed by the wind. Their internal architecture consists of cross beds and bounding surfaces that provide important information about the local climate and environment during dune formation. GPR is a quick, easy and non-destructive reflection method that provides an illustration of the dunes’ inner structure because crossbeds and bounding surfaces gives rise to re-flections that can be studied in a GPR profile. GPR gives good penetration in dunes because the sand has low conductivity and magnetic permeability. Bonäsheden is a dune field situated in the Mora reg-ion in the county of Dalarna and has been deemed a suitable site for the ground penetrating radar sur-veys. The results show that the dunes in the area exhibit... (More)
Dunes are landforms formed by the wind. Their internal architecture consists of cross beds and bounding surfaces that provide important information about the local climate and environment during dune formation. GPR is a quick, easy and non-destructive reflection method that provides an illustration of the dunes’ inner structure because crossbeds and bounding surfaces gives rise to re-flections that can be studied in a GPR profile. GPR gives good penetration in dunes because the sand has low conductivity and magnetic permeability. Bonäsheden is a dune field situated in the Mora reg-ion in the county of Dalarna and has been deemed a suitable site for the ground penetrating radar sur-veys. The results show that the dunes in the area exhibit crossbeds dipping southeast, indicating mi-gration towards that direction and driven by wind predominantly from the northwest. The dunes are interpreted as transverse to the wind direction, because there are differences in the slope of the wind- and the leeward side. Excavations and borehole investigations is recommended in specific selected areas in the dunes as a supplement for more exact interpretation of the dunes. (Less)
Popular Abstract
Dunes are landforms formed by the wind. Their internal architecture consists of cross beds and bounding surfaces that provide important information about the local climate and environment during dune formation. GPR is a quick, easy and non-destructive reflection method that provides an illustration of the dunes’ inner structure because crossbeds and bounding surfaces gives rise to reflections that can be studied in a GPR profile. GPR gives good penetration in dunes because the sand has low conductivity and magnetic permeability. Bonäsheden is a dune field situated in the Mora region in the county of Dalarna and has been deemed a suitable site for the ground penetrating radar surveys. The results show that the dunes in the area exhibit... (More)
Dunes are landforms formed by the wind. Their internal architecture consists of cross beds and bounding surfaces that provide important information about the local climate and environment during dune formation. GPR is a quick, easy and non-destructive reflection method that provides an illustration of the dunes’ inner structure because crossbeds and bounding surfaces gives rise to reflections that can be studied in a GPR profile. GPR gives good penetration in dunes because the sand has low conductivity and magnetic permeability. Bonäsheden is a dune field situated in the Mora region in the county of Dalarna and has been deemed a suitable site for the ground penetrating radar surveys. The results show that the dunes in the area exhibit crossbeds dipping southeast, indicating migration towards that direction and driven by wind predominantly from the northwest. The dunes are interpreted as transverse to the wind direction, because there are differences in the slope of the wind- and the leeward side. Excavations and borehole investigations is recommended in specific selected areas in the dunes as a supplement for more exact interpretation of the dunes. (Less)
Please use this url to cite or link to this publication:
author
El Ali, Mohammad LU
supervisor
organization
course
GEOL01 20161
year
type
M2 - Bachelor Degree
subject
keywords
ground penetrating radar, sand dunes, Bonäsheden, flygsanddyner, georadar
publication/series
Examensarbeten i Geologi vid Lunds universitet
report number
491
language
Swedish
id
8891844
date added to LUP
2016-09-15 15:04:11
date last changed
2016-09-15 15:32:23
@misc{8891844,
  abstract     = {Dunes are landforms formed by the wind. Their internal architecture consists of cross beds and bounding surfaces that provide important information about the local climate and environment during dune formation. GPR is a quick, easy and non-destructive reflection method that provides an illustration of the dunes’ inner structure because crossbeds and bounding surfaces gives rise to re-flections that can be studied in a GPR profile. GPR gives good penetration in dunes because the sand has low conductivity and magnetic permeability. Bonäsheden is a dune field situated in the Mora reg-ion in the county of Dalarna and has been deemed a suitable site for the ground penetrating radar sur-veys. The results show that the dunes in the area exhibit crossbeds dipping southeast, indicating mi-gration towards that direction and driven by wind predominantly from the northwest. The dunes are interpreted as transverse to the wind direction, because there are differences in the slope of the wind- and the leeward side. Excavations and borehole investigations is recommended in specific selected areas in the dunes as a supplement for more exact interpretation of the dunes.},
  author       = {El Ali, Mohammad},
  keyword      = {ground penetrating radar,sand dunes,Bonäsheden,flygsanddyner,georadar},
  language     = {swe},
  note         = {Student Paper},
  series       = {Examensarbeten i Geologi vid Lunds universitet},
  title        = {Flygsanddyners inre uppbyggnad : georadarundersökning},
  year         = {2016},
}