Satellite Radar-derived Virtual Rain and Stream Gauge Data Service
This service provides near real-time rainfall and stream height data from publicly available satellite measurements by creation of a virtual network of rain gauges and stream gauges at points widely distributed over the entire Lower Mekong Region.
Meteorological and hydrological stations are generally maintained by the National Hydro-meteorological Services in the Lower Mekong region. These networks of observation stations, which measure rainfall and stream heights among other variables, are irregularly distributed -- denser in some areas and more sparse over complex terrain and rural and mountainous areas. This irregular distribution creates an information gap in time and space, ultimately hindering decision-making in long-term planning and development. In addition, river flow data, especially transboundary data, is not widely shared among countries.
This service provides, via a web portal and OpenGIS® Web Map Service Interface Standard data feeds, high-resolution regular gridded near-real time data based on data from a virtual network of rain gauges and stream gauges widely distributed over the entire Lower Mekong region.
- leverages a wider range of ground measurements to ensure better calibration of TRMM / GPM and Envisat / Jason-2 data;
- provides more convenient access to TRMM and GPM data products; and
- provides free access to the data streams, and detailed guidance on using these for a variety of applications such as those listed below.
The service provides users with improved, near-real time, virtual rain gauge and virtual stream gauge data sets that can be used for applications such as “now-casting,” hydrological and hydrodynamic modeling, flood forecasting, landslide risk assessment, early warning against floods and landslides, and river basin management. It also provides data for calibrating satellite rainfall estimates.
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Various Lower Mekong region hydro-meteorological agencies.
National hydrometeorological services
- National disaster management agencies
- Water resources departments
- Hydropower companies
- Irrigation departments
- Agriculture departments
- Research institutes
- TRMM and GPM precipitation data
- Envisat and Jason-2 RADAR altimetry data
- Ground rain gauge and stream gauge measurements