Evaluation of small rivers condition in the drainage reclamation areas of Jewish autonomous region in different flood periods

The author investigates the influence of drainage reclamation processes on transition and accumulation of heavy metals in different phases of the hydrological regime, at a different degree of flooding the lands by small rivers in Jewish Autonomous Region. The research shows that heavy metals in surface currents move under the influence of drainage and surface flows running from soil horizons, and under increasing concentration of suspended solids, all these factors resulted in a change of the water pollution index in the river.