Аннотация:In this article we present the analysis of practical and economical use of the territory of Suoi Sap
catchment basin, Son-La province, Vietnam. We used the data of a route survey, performed by the
Vietnam National Forestry University, for the assessment. We analyzed the climatic conditions, soil
and vegetation resources, and economical use of the territory. The research territory is located in the Northern, mountainous part of Vietnam. It was determined that the slopes of the length from 500 to 2000 m (87%) with steepness from 10 to 40 (90%) prevail in the catchment area. The amount of
precipitation (rain) is more than 1750 mm, with most of them falling in summer-autumn (MaySeptember). This leads to the spread of erosion processes, an increase of polluted and degraded lands.
In this regard, the organization of rational and efficient use of land should include the creation of
optimal conditions for the reproduction and protection of soil fertility, increasing its role in
agricultural production. The scientifically based analysis of the impact of natural and other factors on the state of land resources of the catchment area allows us to recommend the use of the most rational and correct criteria and methods of land use in the area. In general, the solution of this problem for similar territories of Vietnam requires the definition of criteria for the ecological and economic efficiency of land use, the analysis of land use, the development of a scientific and methodological approach to the qualitative assessment of land use control in the context of the development of an agrarian economy. WOCAT system has been used in the development of effective watershed land-use technologies.