RFC: Rubber Flux Chachoengsao

General site detail (Updated 7 March 2009)
 Site name
 Rubber Flux Chachoengsao
 AsiaFlux site code
 Location Chachoengsao Rubber Research Center (CRRC,  Department Of Agriculture), 
 Sanam Chaiket., Thailand
 Position 13°39' 56"N , 101°26' 29"E
 Elevation 69 m 
 Slope Negligeable
 Terrain type
 Area 6 ha plot in a 200 ha plantation
 Fetch -
 Climate Tropical monsoon climate
 Mean annual air temperature
 Mean annual precipitation
 1276 mm 
 Vegetation type
 Mono-specific rubber tree (Hevea brasiliensis)  plantation
 Domestic species (Overstory)
 Hevea brasiliensis
 Dominant species (Understory)
 Scarce shrubs and remains of previous intercrop  (rattan, bamboo...)
 Canopy height
 20 m
 Age 13 years old in 2009
 LAI 3.2
 Soil type
 Sandy-clay-loam (Kabin Buri series) characterized  by a compact lateritic layer with ferralitic  concretions at ca 1 m deep

Eddy Covariance method (CO2)
 System Open-path system (LI-7500, LI-COR)
 Wind speed
  Three-dimensional sonic anemometer-thermometer 
  (Young 8100V)
 Air temperature
 Three-dimensional sonic anemometer-thermometer 
  (Young 8100V)
 Water vapor
 Open-path CO2/H2O analyzer (LI-7500, LI-COR)
 CO2 Open-path CO2/H2O analyzer (LI-7500, LI-COR)
 Measurement height
 27 m
 Sampling frequency
 10 Hz
 Averaging time
 30 min
 Data logger
 Data storage
 Original data
 Raw data

 Observation items
  Levels/ Depth
 Global solar radiation(incoming)
 26.5 m  Huksflux pyranometer LP02
 Global solar 
radiation (outgoing)
 Long-wave radiation(outgoing) 
 Long-wave radiation(outgoing) 
 Net radiation
 26 m  Non-ventilated NR-Lite radiometer
 PPFD (incoming)
 -  Delta T BF3 (total, direct, diffuse)
 PPFD (outgoing)
 26 m Quantum sensor Campbell SKP 215
 Direct / diffuse radiation
 Direct / diffuse PPFD
 - Delta T BF3 (total, direct, diffuse)
 Air temperature
 - Campbell 10CRT, non-ventilated  thermocouples  (hand made)
 Humidity - Vaisala HMP35
 Soil temperature
 -0.2 to -1.0 m Thermocouple 
 Soil heat flux
 Soil water 
  0 to -1.2 m TDR probes
 Wind speed
 27 m R.M. Young 05103
 Wind direction
 27 m R.M. Young 05103
 Precipitation 26.5 m Campbell ARG 100
 -  Li 7500, Li-Cor Inc., Lincoln, NE, USA
 H2O concentration
 -  Li 7500, Li-Cor Inc., Lincoln, NE, USA
 Soil respiration
 Continuous (not operating yet)
 Photosynthesis Jarvis-Farquhar modeling under  development, canopy modeling
 Ecological investigation
 Tree height, diameter, root growth and  turnover, phenology, LAI and canopy  structure, litter dynamics, sap flow  velocity, water potential in tree and soil,  soil water content
Observation Period and data Availability
 Measurement Period
 from October 2006 to present
 Measurement Frequency
 Data Availability
 Frederic Gay (frederic.gay [at] cirad.fr)
 Cirad Office, Hevea research Platform, Kasetsart University, 
 10900 Bangkok, Thailand
 Poonpipope Kasemsap (agrppk [at] ku.ac.th)
 Department of Horticulture, Faculty of Agriculture, Kasetsart University,  10900 Bangkok, Thailand
 [General] Olivier Roupsard, Cirad, France (olivier.roupsard [at] cirad.fr)  [Flux and micrometeorology] Jean-Marc Bonnefond, INRA, Bordeaux,  France (bonnefon [at] bordeaux.inra.fr)
 [Water and soil] Kumut  Sangkhasila, Kasetsart University, Bangkok,  Thailand (agrkms [at]  ku.ac.th)
 [Ecophysiology] Philippe Thaler, Cirad, France
 (philippe.thaler  [at] cirad.fr)
 [Ecophysiology] Arak Chantuma RRIT, Thailand  
 (arakchantuma [at] yahoo.com)
Research Fund
 Kasetsart University
Franco-Thai Cooperation Program in Higher Education and Research  Year 2005, ‘Improving Rubber Tree Productivity’ project.

 Tower, 25 m, climbable.
 Electrical power : AC
 Facilities for communication : telephone at an adjoining laboratory  Accommodation : possible at CRRC