GISWR: Témez Model
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S GISWR: Témez Model Application with GIS Antonio Cañamás Catalá
description
GISWR: Témez Model. Application with GIS. Antonio Cañamás Catalá. Objectives. Research the different GIS Databases for Spain Apply Témez Model in a Discuss whether the model is representative of the behavior of the Watersheds - PowerPoint PPT Presentation
Transcript of GISWR: Témez Model
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GISWR:Témez ModelApplication with GIS
Antonio Cañamás Catalá
Objectives
Research the different GIS Databases for Spain
Apply Témez Model in a
Discuss whether the model is representative of the behavior of the Watersheds
Possible applications of the model: streamflow prediction with different scenarios; pumping, climate change…
Spanish Watershed
U.S. Watershed
Témez Model• Rainfall-Runoff Model: uses Mass
Balance
• Data necessary:Monthly Time Series for the last 25-30
years P, Streamflow, PET
Variables of the model to
approximate the behavior:
c, Hmax, Imax, α
Linear Reservoir Model
Location of the WatershedsSurface = 1396
km2
Surface = 921.16 km2
Data Sources
Amount of evapotranspiration that would occur if enough water was available.
Thornthwaite Formula: 𝑃𝐸𝑇= 16 ൬𝐿12൰൬𝑁30൰൬10 𝑇𝑖𝐼 ൰∝
L mean daylight hours of the monthN no. of days in the monthTi mean monthly temperature
I parameter that depends on Tiα parameter that depends on I
Variable Spain U.S.
P LDAStools
Streamflow
PET No direct source
No direct source
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RESULTS• Spanish Watershed
• U.S. Watershed
Spanish Watershed
Bad approx. to peaks
Oct-1990
Apr-1991
Oct-1991
Apr-1992
Oct-1992
Apr-1993
Oct-1993
Apr-1994
Oct-1994
Apr-1995
Oct-1995
Apr-1996
Oct-1996
Apr-1997
Oct-1997
Apr-1998
Oct-1998
Apr-1999
Oct-1999
Apr-2000
Oct-2000
Apr-2001
Oct-2001
Apr-2002
Oct-2002
Apr-2003
Oct-2003
Apr-2004
Oct-2004
Apr-2005
Oct-2005
Apr-2006
Oct-2006
Apr-2007
Oct-2007
Apr-2008
Oct-2008
0
20
40
60
80
100
120Calibration
Calculated Streamflow Data Streamflow
Mm
3
Calibration minimize the difference between observed and calculated
Spanish Watershed
Jan-2005
Apr-2005
Jul-2005
Oct-2005
Jan-2006
Apr-2006
Jul-2006
Oct-2006
Jan-2007
Apr-2007
Jul-2007
Oct-2007
Jan-2008
Apr-2008
Jul-2008
Oct-2008
Jan-2009
Apr-2009
Jul-2009
Oct-2009
Jan-2010
Apr-2010
Jul-2010
0
10
20
30
40
50
60
70
ValidationCalculated Streamflow Data Streamflow
Mm
3
Starting to work accurately
More data needed!!!
Oct
ober
Nov
embe
r
Dece
mbe
r
Janu
ary
Febr
uary
Mar
ch
April
May
June July
Augu
st
Sept
embe
r0
5
10
15
20
25
Monthly mean values
Calculated Streamflow Streamflow data
Mm
3November is a month with often peak flows
Biggest difference!!!
U.S Watershed
Jan-1979
Sep-1979
May-1980
Jan-1981
Sep-1981
May-1982
Jan-1983
Sep-1983
May-1984
Jan-1985
Sep-1985
May-1986
Jan-1987
Sep-1987
May-1988
Jan-1989
Sep-1989
May-1990
Jan-1991
Sep-1991
May-1992
Jan-1993
Sep-1993
May-1994
Jan-1995
Sep-1995
May-1996
Jan-1997
Sep-1997
May-1998
Jan-1999
Sep-1999
May-2000
Jan-2001
Sep-2001
May-2002
Jan-2003
Sep-2003
May-2004
Jan-2005
Sep-2005
May-2006
Jan-2007
Sep-20070
50
100
150
200
250
Calibration
Calculated Streamflow Data Streamflow
Mm
3
Bad approx. to peaks
Flood July 2002
January
February
March
April
May
June
July
August
September
October
Novem
ber
December
0
5
10
15
20
25
30
Monthly mean values
Calculated Streamflow Data Streamflow
U.S Watershed
Good approx. to base flows
Jan-2008
Apr-2008
Jul-2008
Oct-2008
Jan-2009
Apr-2009
Jul-2009
Oct-2009
Jan-2010
Apr-2010
Jul-2010
Oct-2010
Jan-2011
Apr-2011
Jul-2011
Oct-2011
Jan-2012
Apr-2012
Jul-2012
Oct-2012
0
10
20
30
40
50
60
70
80Validation
Calculated Streamflow Data Streamflow
Trying to figure out why these big differences in some months
May….
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REMAINING TASKS
Discuss the results for the U.S Watershed Run a
Climate change or Pumping simulation or both
and analyze the results…
Reduce in P and
Increase in PETAquifer Recharge - Pumping
(a period of time)
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Acknowledgements• Gonzalo Espinoza
• Dr. David Maidment
Questions?
