Imitating mathematical model of middle and small rivers drain for mountain territories

The method of creation the imitating mathematical models of water drain for mountain rivers is offered. On an example of middle and small rivers at Altai-Sayany highland the universal model of seasonal and interannual dynamics of a drain is received. For calculation the seasonal dynamics of a drain four hydrological periods are allocated: winter low water (XII-III months), spring-and-summer high water (IV-VI), summer (VII-VIII) and autumn (IX-XI) low waters. The model is applicable for the voluntary river pools, including where it is insuffi- cient or there is no hydrometeorological information. Monthly dynamics of air temperatures generalized on all highland and precipitation normalized on the corresponding mean annual values is used. Cartographical infor- mation on relief and landscape structure of pools is used. The convenient criterion for estimation the adequacy of mathematical models is offered.