Today, proper management of water resources without accurate information about them is impossible. On the other hand, utilization of existing traditional methods in estimating the amount of water resources in snow catchment areas (basins mostly filled with snowfall), in addition to practical problems and high costs, is unable to provide with sufficient precision due to hardships in access to areas difficult to pass. The news of surprising floods over the past decade are examples of this inability to estimate these resources and the consequent loss of human and agricultural resources. Considering the dynamic nature of snow basins, technology of remote sensing has been introduced as a much better tool compared to traditional methods in terms of up-to-date information, accessibility and reasonable cost, and has found vast applications in management of water resources. In this paper, the method of estimating the two important parameters of level and depth of snow basin through combination of information from remote sensing images and new aerial laser systems (airplane and helicopter) using GPS satellite positioning methods and new technique of DGPS are proposed and described.