The MRC Decision Support Framework (DSF) will be complemented through continued development of the WUP-FIN modelling tools to improve their hydrological, environmental and socio-economic impact assessment capabilities. In addition, an advanced modelling framework for the lower Mekong will be created. It will form a basis for integrated handling of hydrology, land use, flow, flooding, sediment transport, sedimentation, erosion, nutrients, primary production, water quality, salinisation and acidification.

The modelling approach is intended to be flexible. It must be emphasized that the system platform is open and capable of accommodating various approaches and models.

Modelling system includes the following models:

a) for the watershed

  • VMOD as a physically based distributed model

b) for the lake and river system

  • basic EIA 2/3D hydrodynamic, sediment, salinity and water quality model for the focal areas (floodplains and the river)

  •  improved sediment, erosion, river channel and control structure descriptions added to the 2/3D model (2/3D River)

  • 1D Vietnamese National Delta model coupled with the 2/3D model

The models are coupled with a database which consists of standard GIS-data and versatile meteorological, hydrological, hydrodynamic and water quality measurements. The database and the models are run through a common graphical user interface. The model outputs can be utilized directly e.g. in the standard GIS environment for combination with socio-economic data and further analysis. In this paper, the used in-house and commercial GIS tools for analysis will be compared as well.

Click the image above to view the Schematic presentation of the different model modules


Click the image above to view model animation about the suspendet sediment concentration in the Tonle Sap Lake during the year 2000 flood.