THE ROLE OF LANDCOVER CHANGE IN MONTANE MAINLAND SE ASIA IN ALTERING REGIONAL HYDROLOGICAL PROCESSES

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THE ROLE OF LAND-COVER CHANGE IN MONTANE MAINLAND
SE ASIA IN ALTERING REGIONAL HYDROLOGICAL
PROCESSES UNDER A CHANGING CLIMATEHonolulu
Meeting8-9 October 2007FIELD HYDROLOGYTom
GiambellucaAlan ZieglerMike NulletMaite
Guardiola-Claramonte
Honolulu, 2007, Field Hydrology, slide 1
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OUTLINE

• Status of observation networks
• Data inventory
• Addressing project goals
• Spin-off analyses
• Beyond the current project

Honolulu, 2007, Field Hydrology, slide 2
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Field Hydrology Team
Progress Report

• Study Watersheds
• Selected Xishuangbanna (Yunnan, China) and Chiang
  Mai (northern Thailand) as study regions. Luang
  Namtha postponed.

• Designed networks, acquired equipment, shipped
  equipment to study regions.

• Selected study watersheds and surveyed sites for
  individual recording stations.

• Installed stations Completed in June 2004.

• Set up data retrieval, screening, archival
  procedures.

• Established climate/hydrology data web site.

Honolulu, 2007, Field Hydrology, slide 3
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Honolulu, 2007, Field Hydrology, slide 4
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Honolulu, 2007, Field Hydrology, slide 5
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Nam Ken Watershed
2004 Missing TC data May-Aug 2005 All
Good 2006 Good Jan-Oct
2004 Good May-Dec 2005 Good Jan, Apr 2006 Good
Jan-Oct
No Data After October 2006
2004 Some missing RF 2005 Good 2006 Some
missing RF
2004 Missing TC Tir data May-Aug 2005 Missing
some TC Tir 2006 Missing SM1 Jun-Aug
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430
July-Nov 2005 possible wind data error
July-Nov 2005 missing wind data
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434
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433
2005 numerous gaps
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2007 Major Land Cover Change
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May 2004 Aug 2007 minor gaps
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Data Inventory
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Honolulu, 2007, Field Hydrology, slide 9
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Outlets for Field Data

• Guardiola-Claramonte et al. (in review)
• Watershed modeling providing forcing and
  calibration
• Watershed modeling using climate model results
  data can be used in downscaling and for
  validating climate model control simulations
• Other

Honolulu, 2007, Field Hydrology, slide 10
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Other Possible Analysis

• Characterize and compare the two watersheds in
  terms of
• RF mean, interannual variability, spatial
  variability, rainfall intensity, etc.
• ET based on TVEB, P-M/soil water balance, dry
  season root-water extraction
• Q response of total, baseflow, and stormflow to
  RF under changing basin storage conditions
• Determine peakflow travel times, determined from
  instances of storms isolated in one part of
  basin relate this to sediment/chemical source
  area analysis
• Characterize and compare different land covers in
  terms of radiation balance
• Albedo
• Longwave outgoing
• Net radiation

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Changing Streamflow Response
DHSVM Simulation Pang Khum Experimental
Watershed Chiang Mai, Thailand (Cuo et al. 2007)
Q underestimated
Q overestimated
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Changing Streamflow Response at Nam Ken
Late
Middle
Early
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Examining Response on an Event Basis
QstormRF 24.3
QstormRF 17.8
QstormRF 28.9
QstormRF 18.3
QstormRF 15.2
QstormRF 8.4
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Nong Hoi (1300 ha)
Mae Hae (300 ha)
Mae Ja (700 ha)
Honolulu, 2007, Field Hydrology, slide 15
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Nong Hoi (1300 ha)
Agriculture Urban
Mae Hae (300 ha)
Mae Ja (700 ha)
Disturbed Forest, Shrub, Urban
Agriculture Elephant Area
Honolulu, 2007, Field Hydrology, slide 16
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Radiation Balance
Pang Khum Experimental Watershed Chiang Mai,
Thailand (Larkin et al. in prep.)
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Radiation Balance
Pang Khum Experimental Watershed Chiang Mai,
Thailand (Larkin et al. in prep.)
Honolulu, 2007, Field Hydrology, slide 18
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Radiation Balance
Pang Khum Experimental Watershed Chiang Mai,
Thailand (Larkin et al. in prep.)
Honolulu, 2007, Field Hydrology, slide 19
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Whats Next?

• Address Project Goals
• Watershed analysis
• Write up
• Conduct other analyses?
• Follow-up proposals
• Alan NSF nutrient/carbon flux
• Jeff NASA water/C effects of rubber expansion
• Others?

Honolulu, 2007, Field Hydrology, slide 20
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Thats all for now
Honolulu, 2007, Field Hydrology, slide 21