<br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Halldóra Bergţórsdóttir</b> <span dir="ltr"><<a href="mailto:halldorabjork87@gmail.com">halldorabjork87@gmail.com</a>></span><br>
Date: 2012/10/29<br>Subject: Folda Thursday seminar series<br>To: <a href="mailto:folda@listar.hi.is">folda@listar.hi.is</a>, <a href="mailto:jhi@hi.is">jhi@hi.is</a><br><br><br>Dear Folda members,<br><br>Ágúst Gunnlaugsson is going to present to us his Bachelor's project, next Thursday (1st of November)<br>
<br>The aim of this research is to map the changes of the glacier rivers on<br>
Skeiđarársandur, Iceland over the period from 1991 to 2009. Skeiđarársandur<br>
is the biggest active sandur on earth (Gomez et al. 2000). Great changes<br>
occured during the period of research. Following a volcanic eruption in<br>
northwestern Vatnajökull in autumn of 1996, a great jökulhlaup came down on<br>
Skeiđarársandur (Smith <a href="http://et.al" target="_blank">et.al</a> 2006). Data used came from the SPOT 5<br>
satellite, TerraSAR-X radar satellite and aerial photographs from The<br>
national land survey of Iceland. Satellite photographs were rectified to<br>
digital elevation model and aerial photographs were georeferenced to a map<br>
from the National land survey of Iceland. Cartographic work was done in<br>
ArcMap from Esri. Glacial rivers and lagoons were drawn up as polygons and<br>
shown on maps. The glacier margin of Skeiđarárjökull was also mapped to find<br>
out the retreat of the glacier margin during the period of research.<br>
<br>
The Gígjukvísl river showed significant change following the 1996 jökulhlaup<br>
and lagoons started to form by the glacier margin during the period. The<br>
largest lagoons formed in the Gígjukvísl area. Skeiđará river changed its<br>
course quite a lot over the research period and in July 2009 all the water<br>
that was flowing into the channel of Skeiđará started flowing into<br>
Gígjukvísl river. Great changes occured in the channel of Gígjukvísl river<br>
following that event. The retreat of the glacier margin was great during the<br>
period. The western part shrinked about 5 km2, the middle part about 9,5 km2<br>
and the eastern part 2 km2.<br><br>Best regards,<br>Board of Folda<br>
</div><br>