The river water resources of the Magadan region and their long-term variability

We present the technique for constructing the map for the modulus of annual flow of the rivers in the Magadan region. We derived district formulas for determining the norm of annual flow and the variation coefficient for the unexplored rivers of the region. The numerical estimate of the river water resources in the region is refined considerably. Satisfactory methods to forecast the annual inflow of water to the reservoirs of the Kolymskaya Hydro, and of the Ust-Srednekanskaya Hydro under construction have been developed for the first time (the predictability from independent data constituted 81.8%).