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

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


1
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
2
OUTLINE
  • Status of observation networks
  • Data inventory
  • Addressing project goals
  • Spin-off analyses
  • Beyond the current project

Honolulu, 2007, Field Hydrology, slide 2
3
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
4
Honolulu, 2007, Field Hydrology, slide 4
5
Honolulu, 2007, Field Hydrology, slide 5
6
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
Honolulu, 2007, Field Hydrology, slide 6
7
430
July-Nov 2005 possible wind data error
July-Nov 2005 missing wind data
429
434
428
432
433
2005 numerous gaps
426
423
2007 Major Land Cover Change
425
424
May 2004 Aug 2007 minor gaps
422
421
427
8
Data Inventory
Honolulu, 2007, Field Hydrology, slide 8
9
Honolulu, 2007, Field Hydrology, slide 9
10
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
11
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

Honolulu, 2007, Field Hydrology, slide 11
12
Changing Streamflow Response
DHSVM Simulation Pang Khum Experimental
Watershed Chiang Mai, Thailand (Cuo et al. 2007)
Q underestimated
Q overestimated
Honolulu, 2007, Field Hydrology, slide 12
13
Changing Streamflow Response at Nam Ken
Late
Middle
Early
Honolulu, 2007, Field Hydrology, slide 13
14
Examining Response on an Event Basis
QstormRF 24.3
QstormRF 17.8
QstormRF 28.9
QstormRF 18.3
QstormRF 15.2
QstormRF 8.4
Honolulu, 2007, Field Hydrology, slide 14
15
Nong Hoi (1300 ha)
Mae Hae (300 ha)
Mae Ja (700 ha)
Honolulu, 2007, Field Hydrology, slide 15
16
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
17
Radiation Balance
Pang Khum Experimental Watershed Chiang Mai,
Thailand (Larkin et al. in prep.)
Honolulu, 2007, Field Hydrology, slide 17
18
Radiation Balance
Pang Khum Experimental Watershed Chiang Mai,
Thailand (Larkin et al. in prep.)
Honolulu, 2007, Field Hydrology, slide 18
19
Radiation Balance
Pang Khum Experimental Watershed Chiang Mai,
Thailand (Larkin et al. in prep.)
Honolulu, 2007, Field Hydrology, slide 19
20
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
21
Thats all for now
Honolulu, 2007, Field Hydrology, slide 21
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