Influences of arable lands agriculture on the suspended substances drain

On the example of rivers on Altai-Sayansk highland by means of system and analytical modeling influence of arable lands agriculture on suspended substances drain is analysed. Quantitative dependences of drain on arable lands area in water collecting basins of rivers during the different periods of year are established. In winter low water the additive to a drain is proportional to this area, and in the rest time of year - to the linear scale of arable lands. The universal imitating model of suspended substances drain, describing its seasonal and long-term dynamics on the basis of data on landscape structure and orography of river pools, the arable lands, average monthly air temperatures and monthly precipitation is developed. The model uses only cartographical and hydrometeorological information and is applicable for any river basins of the highland even in the absence of hydrochemical observation.