Clayton Ernst 10/03/13 Term Project Proposal Title: A Geospatial ...

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11 Δεκ 2013 (πριν από 3 χρόνια και 8 μήνες)

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Clayton  Ernst
 
10/03/13
 
 
Term  Project  Proposal
 
 
Title:
 
A  Geospatial  Analysis  of  Surface  Temperature  and  Elevation  on  the  Imja  Glacier  in  Nepal
 
 
Name:  
Clayton  Ernst
 
 
Course:  
CE394K
.3  
-­‐
 
GIS  in  Water  Resources,  Fall  2013
 
 
Goals  of  the  Project:
 
 
 
The  overall  go
al  of  this  project  is  to  
characterize
 
the  
geospatial  
relationship  between  
debris  
thickness,
 
thermal  conductivity,
 
and  surface  slope  on  the  Imja  
G
lacier
 
in  Nepal
.  
 
Such  knowledge  
will  greatly  aid  in  the  development  of  a
 
more  accurate  melt  model  for  the
 
glac
ier,  which  in  turn  
will  improve  the  ability  to  predict  glaci
er  lake
 
outburst  flood
 
(GLOF)
 
events  and  quantify  the  
associated  risks  to  downstream  communities.
 
 
Lhotse  Shar
,  also  known  as  the  
Imja  Glacier
,
 
began  melting  in  the  1960’s  to  form  the  glacial  
lake
 
Imja  Tsho.  This  lake  has  been  growing  
in  size  
ever  since,  with  the  rate  of  growth  accelerating  
in  recent  decades.  The  lake  has  been  identified  as  a  major  threat  to  downstream  communities  due  
to  the  possibility  of  a  catastrophic  
GLOF  event
.  For  this  reason
,  current  efforts  are  focused  on  
gaining  better  understanding  of
 
the  dynamics  of  the  lake  and  
the  receding
 
glaciers.
 
 
Specifi
c  goals  of  this  project  include  
the  creation  of  a  debris  cover  thickness  map  upglacier  
of  Imja  Lake  based  on  relationships  between  
thermal  resistance,  elevation,  slope,  and  aspect.    
Currently,  the  
resolution  of  
available  
debris  thickness  
data  is
 
60m.
 
It  is  the  goal  of  this  work  to  
develop  a  
fine
-­‐
scale  
debris  cover  thickness  map  
with
 
5m  resolution
.  This  will  be  accomplished  by  
incorporating
 
a  5m  digital  elevation  m
odel  (DEM)  of  the  glacier  
with
 
recently  collected
 
field  data  
using
 
interpolative  techniques  such  as  Kriging
.
 
T
hen
,  a  model  
optimized  using  the  
field  data
 
will  
be  employed  to  make  
interpretations  
across  the  
entire  
glacier.
 
 
Data  to  be  used:  
 
 
This  project  was  inspired  by  my  colleague  Dave  Rounce  who  does  research  on  
Imja  
Lake
 
and  recently  returned  from  an  extensive  field  campaign  in  Nepal.  He  will  provide  me  with  the  
following  data  sets:
 
-­‐

R
emotely
 
sensed
 
surface  temperature  
d
ata  
(available  with  60m  cell  resolution)  
 
-­‐

Recently  collected  field  
measurements
 
including  debris  cover  thickness  and  soil  
temperature  profiles  
on  
the  glacier
 
(GPS  located)
 
-­‐

A  
DEM
 
of  the  glacier  with  5m  resolutio
n  obtained  by  an  independent  researcher  using  
remote  stereoimaging