OZCAR-RI M-TROPICS, Houay Pano - Lao People's Democratic Republic

Basic Information
Site Name
OZCAR-RI M-TROPICS, Houay Pano
Short name
M-TROPICS/MSEC-Houay Pano
Country
Lao People's Democratic Republic
Web Address
M-TROPICS website
M-TROPICS Twitter
Site Manager
Dr. Olivier RIBOLZI
Dr. Laurie BOITHIAS
Site Description
Houay Pano is a small agricultural catchment (60 ha) of northern Lao PDR, 10 km from the UNESCO world heritage city of Luang Phrabang, in a sloping land environment monitored since 1998. The objective is to monitor the impact of land use changes from annual crops (upland rice, Job’s tear and maize, cultivated with slash and burn system) to perennial (teak trees), and of climate changes upon hydrological and sedimentary fluxes and budgets, along with water quality (including microbial contamination). The mean slope is 48%. Alfisol, Ultisol, Entisol developed on shale and shist. Monitoring devices include an automatic meteorological station, weirs to monitor discharge from nested catchments, suspended sediment, and bedload, ...
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Last modified
2025-01-07 11:01:56

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General Characteristics and Status
Site Status
Operational
Year Established
1998
Observed properties
soil parameterwater parameteratmospheric parameterchemical parameterecosystem parameterbiological parameterlandscape parameteragricultural parameterenvironmental parametercarbon-to-nitrogenratiocationexchangecapacityperchedwatertabledepthperchedwatertablethicknesspotentialevaporationpressureheadsoilaciditysoilbulkdensitysoilgravimetricwatercontentsoilimmobilewatercontentsoilmatrixwaterpotentialsoilmatrixwaterpressureheadsoilmobilewatercontentsoilmoisturecontentsoilmoisturefieldcapacitysoilnutrientsoilprofilewatercontentsoilsaturationindexsoilsuctionsoiltexturesoilvolumetricwatercontentsoilwatercontentsoilwatercontentintherootzonesoilwaterholdingcapacitysoilwaterpotentialsoilwaterretentionsoilwaterretentioncurvesoilwiltingpointthicknessofsoilhorizontotalorganiccarbonchlorophyllcontentofwaterconductivitydissolvedorganiccarboninwatergroundwaterlevelhydraulicconductivitymacroporessaturatedwatercontentperchedwatertablerivertemperaturerunoffamountsaturatedhydraulicconductivitystreamordersurfacerunoffsuspendedsolidswateraciditywateralkalinitywatercontentwaterdepthwaterlevelwaterqualitywatertablewatertemperaturewatertransparencywatervelocitywatervolumeairhumidityairtemperaturedaylightlengthdiffuseradiationintensitydirectradiationintensityglobalradiationirradianceheatfluxincomingradiationintensityinterceptionirradiancemaximumtemperaturemeanannualairtemperaturemeanannualprecipitationmeanannualtemperatureminimumtemperaturenetradiationirradianceprecipitationintensityrelativehumiditysolarradiationsunshinedurationwinddirectionwindspeedacidneutralisingcapacityavailablephosphorusbasesaturationcationexchangecapacitydissolvedorganiccarboninwaterinorganiccarboncontentinorganicnitrogencontentmethaneconcentrationpercentcarbonpercentorganiccarbonpHvalueofwaterredoxpotentialofwatersoilorganicresidualsoilpHsuspendedsolidstotalcarbontotalorganiccarbonwateralkalinitywaterturbidityabovegroundnetprimaryproductiondeadwooddecayingrateecosystemstructurefireseverityindexforeststructuregerminationdategroundwaterlevelgroundwaterpermeabilitylitterresidencetimemicrobialdiversitysoilmicrobialdiversityspeciesturnovertreediameteratbreastheighttreedistributioncanopycoverratecanopyheightfloweringdateleafarealeafarearatioplantheightrootdensityrootgrowthraterootlengthtreeagetreebasalareatreediametertreeheightlandcoverlanduselanduseintensitylandscapecompositionlandscapeconfigurationlandscapefragmentationcropgrowthrateabioticheterogeneity
Affiliation and Network Specific Information
Affiliation
ILTER✔This site is a verified "ILTER" member.
OZCAR RI✔This site is a verified "OZCAR RI" member.
LTER Europe✔This site is a verified "LTER Europe" member.
GERI✔This site is a verified "GERI" member.
LTER France✔ (CZO_EU_FR_091)This site is a verified "LTER France" member.
Critical Zone Collaborative Network (CZ Net)✖The affiliation of this site with "Critical Zone Collaborative Network (CZ Net)" is not verified by the network on DEIMS-SDR.
Photos
not defined
not defined
Geographic
300 m
1000 ft
View in site map
Centroid/Representative Coordinates

Latitude: 19.85241 Longitude: 102.16891

Size
ca. 60.00ha
Elevation (average)
513.00msl
Elevation (min)
423.00msl
Elevation (max)
718.00msl
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Site information [.json]

Centroid/representative coordinates [.shp] [.kml]
Bounding Box [.shp] [.kml]
Boundaries [.shp] [.kml]
GEO-BON Biome
Terrestrial
Biome
Agricultural
Ecosystem Type
Agricultural
Air Temperature: Average Annual
23.40°C
Precipitation Annual
1366.00mm
Landforms
Mountain
Geology
Triassic shal and schist
Vegetation
Annual changes in land use were mostly related to shifting cultivation (with slash-and-burn method) from 1998 to 2015, and to the expansion of teak tree plantations since 2009. Overall, the areal percentages of annual crops and of forest respectively decreased from 26% to 4% and from 18% to 9%, while teak tree plantations increased from 2% to 34% from 1998 to 2019.
Soils
Soil distribution from hilltop to valley bottom comprises shallow Inceptisols along the crests, deep, clayey Ultisols (30%) and Alfisols (50%),and poorly drained clayey Dystrochrepts at the foot slopes and along the stream banks. Soil thickness increases from a few tens of centimers near the crests to few meters in the thalweg.
Hydrology
The drainage system of the Houay Pano catchment comprises a 1200 m perennial stream of irregular topography, which receives water from ephemeral waterways. The stream originates in the upper, mountainous part of the catchment and later becomes a tributary to the Houay Xon, which itself is a sub-tributary of the Num Dong before its confluence with the Mekong River near Luang Prabang.
Site Type
Stationary land-based site
Design of Experimentation
partly experimentation
Scale of Experimentation
beyond catchment scale
Design of Observation
mainly observation
Scale of Observation
beyond catchment
Permanent Power Supply
Yes
Equipment
Observation devices » Measurement tower » No tower on site
Data infrastructure » Data services » Data portal
Data infrastructure » Data storage » Paper
Data infrastructure » Data storage » Structured file
Supporting infrastructure » Transportation » Vehicle 2WD
Supporting infrastructure » Transportation » Vehicle 4WD
Supporting infrastructure » Staff room at site » 2 - 5 places
Supporting infrastructure » Lodging at site » No lodging possible
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (from site) » Cable based
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (within site) » No within site data transmission
Energy and data transmission infrastructure » Energy supply » Permanent Power Supply Location » Central station(s)
Energy and data transmission infrastructure » Energy supply » Permanent Power Produced » 5-10 kW
Equipment notes
A large house has been built in the direct viciinty of the cathchment for the lodgment of the many scientiss, students and visitors. It includes a small soil lab to process sediments (bedload removed from the weir traps) and the suspended sediments as well as a small water lab. for ground and surface water quality (including fecal bacteria).
Accessible All Year
Yes
All parts of Site Accessible
Yes
Access Type
regular car
Permanent Operation
Yes
Operation Notes
Four very well trained Laotian scientist are permanently on site for biodiversity and agronomy, hydrology and erosion, and superficial geophysics.
Site Visit Interval
15
Maintenance Interval
7
General Data Policy
Co-authorship on publications resulting from use of the dataset
The data provider must be offered co-authorship for publications using this dataset at least within the metadata description
Formal acknowledgement of the dataset providers
Reprints of articles using the dataset must be provided to the data provider
The dataset provider is given a complete list of all products that make use of the dataset
Data Policy URL
https://mtropics.obs-mip.fr/
LTER Site Classification
Master