National Consultation with TNMC 3 May 2005, Bangkok WUP-FIN Phase II Model development

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National Consultation with TNMC 3 May 2005, Bangkok WUP-FIN Phase II Model development. Nam Songram watershed area. Area: 13 126 km2 Elevation: min 135 m amsl max 675 m amsl. Tools. 2D distributed hydrological model coupled with a 1D hydrodynamic river, reservoir and lake model - PowerPoint PPT Presentation

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  • Nam Songram watershed areaArea: 13 126 km2Elevation:min 135 m amslmax 675 m amsl

  • Tools2D distributed hydrological model coupled with a 1D hydrodynamic river, reservoir and lake modelPhysical model of the application area that takes into account variability in elevations, soil properties, vegetation, land use etc.Run through a GIS-type graphical user interface1D lumped hydrological model HBV3D hydrodynamic model

  • Nam Songkhram application areas

  • VMod model structureOne grid box computationModel grid & flow network

  • DataDigital elevation map for the land area with 50m resolution from old topographical maps and new SRTM elevation model with 90m resolution (MRC)Hydrographic atlas for Mekong mainstream, bathymetry of the river (MRC)The older (1997) and new (year 2002) land use data (MRC).Soil types (MRC)Location of river networks (MRC)Precipitation from 16 stations at or near the watershed (MRC)

  • DataTemperature (daily minimum and maximum temperatures) from one station at the watershed and a few further away (MRC)Evaporation from three stations at or near the watershed and a few further away (MRC)Discharge and water level observations form two points on the watershed: Ban Tha Kok Daeng and Nam Oon damDischarge and water levels from the Mekong mainstream riverNakhon Phanom measured water levels and dischargesDischarge from DSF to 3D model upper boundary condition in Mekong mainstream

  • Elevation13126 km2heightsmin 135mmax 675 m

  • Landuse/Irrigated area89% of landuse agricultureirrigated 3280 km2 (25% of catchment)

  • Soils~40 % acrisol~40 % plinthic acrisollow water retention and conductivity

  • Weather data16 precipitation stationsTemperature data from at least one stationEvaporation, few stations

  • Modelling1km model grid (resolution can be increased)flow network computed from DEM16 landuse classes10 soil classesirrigation and rice agricultural practice not yet taken into accont

  • Model user interface

  • Preliminary flow computation with VModComputed flow at Ban Tha Kok Daeng compared to measured data

  • 3D hydrodynamic and WQ application3D hydrodynamic model coupled with a water quality model3D hydrodynamicsflood arrival time, duration and depth in different locations of the modelled area, other flood characteristicsWater quality: sediment concentration, net-sedimentation, oxygen, etcRun through a GIS-type graphical user interface

  • Input data for the 3D modelRiver and floodplain topographyHydrographic atlas data river cross-sections for Nam Songkhram digital elevation map (DEM) for floodplainBoundary conditionsUpstream discharge and water level in MekongUpstream dishcarge in Nam SongkhramDownstream rating curve (in Mekong)LanduseWind(Precipitation)

  • Digital elevation model and model area

  • 3D view on the wetlands

  • Inundation on Sept 2000

  • 3D model grid for NSK model

  • 3D model grid for NSK hydrodynamic model

  • Model animation window

  • OutputTool to understand the hydrology of the Nam Songkhram watershedScenariosLanduseClimate changeIrrigation developmentReservoir developmentFloodplain dynamics with the 3D model applicationInteraction between Nam Songkhram and Mekong

  • Requested dataSocio-Economic data Statistical or spatial district/commune level data (preferably from many years to see trends) on primary &secondary occupations, particularly on fish-related livelihoods population, including rural/urban population &migrationpoverty. + info on other reports related to above mentioned issues.

  • Requested dataHydrological, hydrodynamic and water quality model data:Cross section data for Nam Songkhram and other tributaries including areas from both banks and floodplain: survey by DEDP in 1993 or 1994Water level and discharge data and rating curves from the Nam Songkhram basin:Nam Songkhram at Ban Chai Buri and Ban Tha Huai LuaNam Oon at Ban Phok Yai, Pannanikom and Bang Nong BuaNam Yam at Akat Amnuai and Ban Khon SaiHuai Khong at Ban Tha Sri ChomchunHuai Hi at Ban Nong YangNam Mao at Ban Kham HaiWater level at stations measured by NEDECO in 1981-1982 with temporary gauges.Irrigation data: irrigation practices, location of pumping stations, discharge of pumping in each station, project area and location, etc.Ground water levels from as many wells as availableDetailed data (height, storage capacity, bridge dimensions etc.) from existing control structures (dams, weirs, dikes, bridges, road embankments, gates) in the basin.

  • Expected inputs from the MRCS modelling team and Thai partners Collection and basic processing of existing dataActive participation in training, field measurements and modeling activitiesScenario modelingParticipation in field measurement data and modeling results processingParticipation in reporting and publication of results

    Project resources for any specific local application are quite limited. Because of this, applications must get strong local support in form of work force and data collection.

  • More information:www.eia.fi/wup-finContent of the projects two phasesPersonnel & contact detailsDocuments downloadableTraining portfolio: presentations, documents, exercises

    MRCS/WUP-FIN www.eia.fi/wup-fin

    Introductory training course on WUP-FIN modelling and assessment toolsWUP-FIN Phase 1

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