Applying high-resolution and multi-time remote sensing information for studying, forecasting and evaluating a number of geological hazards in large hydropower reservoir basin and traffic system in Northwestern region (soil erosion, flash flood-debris flows, landslides,, lake-side landslide and reservoir sedimentation). In particular, the specific objectives are: Applying the high resolution remote sensing to clarify the current status of landside, erosion, flash flood-debris flows (lake-side landslide and reservoir sedimentation in Hoa Binh, Son La Hydropower Reservoir, and the No. 6, No. 12, 4D Highways and Viet Tri – Lao Cai Railway; Forecasting the risks of landslide, soil erosion, flash flood-debris flows, lake-side landslide and reservoir sedimentation in Hoa Binh and Son La hydropower reservoir regions.

-  Theoretical results:
+ Application of high-resolution remote sensing and GIS to create a map showing current status of geological hazards with scale of 1/50.000 (Hoa Binh-Son La reservoir regions and the 6, 12, 4D Highways, the Viet Tri- Lao Cai railway), scale of 1/25.00 (Muong Lay and Ban Van areas); evaluation on current status and riskiness of geological hazards in study area.
+ Application of high resolution remote sensing and GIS to create geological hazard maps with scale of 1/50.000 for Hoa Binh-Son La reservoir areas; and scale of 1/25.000 for Muong Lay- Ban Van areas.
 + In Hoa Binh- Son La reservoir areas, high and very high landslide hazards have the proportion of 27% of the total regional area; the average hazard  proportion of 34%, low and very low hazard proportion of 39%. In the Muong Lay area, high and very high landslide hazards distribute mainly in the East slopes; high and very high flash flood- debris flows hazard distribute mainly in the West of Muong Lay. Muong La-Son La areas, high and very high soil erosion hazards distribute mainly in the Northeast Muong La district and Southwest Bac Yen district. Low and very low soil erosion hazard distribute in the Northwest area of Muong La. High and very high lakeside landslide and reservoir sedimentation hazard distribute in the middle of Hoa Binh lake from Bac Yen to Phu Yen. Low and very low lakeside landslide and reservoir sedimentation hazard distribute in the upper of Hoa Binh lake from Muong Lay to Bac Yen.  High and very high lakeside landslide and reservoir sedimentation hazard in the Muong Lay area.
- Practical results:
Prevention and/or reduction the probability of natural hazards and enhancement of environmental protection at the local of the Northwestern

- Application of high resolution remote sensing and GIS research geological disaster bring both scientific and practical benefits. It is the first application of high resolution remote sensing in the Northwestern region to make  detailed research and assessments  on the current state of geological disaster region establish and supplement roughly 1000 sliding masses, flash flood -debris flows in the rugged mountainous areas hunman can not accessibility.
- The first time in the Northwestern regional application high resolution remote sensing research detailed assessment for factors arising geological disaster region; accurately delineate the boundaries, characteristics of factors arising geological disaster, geological petrology,  weathering crust, forest cover, land use, ….; application of models to predict geological disasters hazard reliability and authenticity.

The results will be applied, transferred to Northwestern Steering Committee and local.
* Petition of the project’s leader:
 - Although VNREDSat-1 images with small size (17 x 17km), suitable for small research area, important economic constructions, but need loftiness applies with high resolution remote sensing data to predict geological disaster in the dangerous areas of Viet Nam. Because, them bring more benefits not only scientist, but also for practical; bring more economic benefits, reduce cost of geological disasters research as well as monitoring and environmental protection.
- High resolution remote sensing images are supported continuous observation device in the dangerous areas, which usually were broken by geological disaster, this solution is useful to prevent vulnerable. Monitoring, environmental protection by High resolution remote sensing technology and GIS bring practical benefits in disaster prevention.