[en] The distributed hydrological 'rainfall- runoff' models provide possibilities of the physically based simulation of surface and subsurface flow on watersheds based on the GIS processed data. The success of such modeling approaches for the predictions of the runoff and soil erosion provides a basis for the implementation of the distributed radionuclide transport watershed models. Two distributed watershed models of radionuclide transport - RUNTOX and DHSVM-R have been used to simulate the radionuclide transport in the basin of the Dnieper River, Ukraine and watersheds of Prefecture Fukushima. RUNTOX is used for the simulation of radionuclide wash off from the experimental plots and small watersheds, and DHSVM-R is used for medium and large watersheds RUNTOX is two dimensional distributed hydrological model based on the finite-difference solution of the coupled equations the surface flow, subsurface flow, groundwater flow and advection- dispersion equations of the sediments (eroded soil) and radionuclide transport in liquid and solid phases, taking into parameterize the radionuclide exchanges between liquid and solid phases.. This model has been applied to the experimental plots in Ukraine after the Chernobyl accident and experimental plots in the Fukushima Prefecture. The experience of RUNTOX development and application has been used for the extension of the distributed hydrological model DHSVM by the including of the module of the watershed radionuclide transport. The updated model was named by DHSMV-R. The original DHSVM (Distributed Hydrology Soil Vegetation Model) was developed in the University of Washington and Pacific Northwest National Laboratories. DHSVM is a physical distributed hydrology-vegetation model for complex terrain based on the numerical solution of the network of one dimensional equations. The model accounts explicitly for the spatial distribution of land-surface processes, and can be applied over a range of scales, from plot to large watershed at sub-daily to daily timescales. The surface flow sub-model of DHSMV has been modified in DHSMV-R: D4 flow direction approach has been replaced by the D8, more numerically efficient finite-differences scheme was implemented for flow and sediment transport equations. On the basis of the approach developed within RUNTOX the new module of radionuclide wash-off from catchment and transport via stream network in soluble phase and on suspended sediments including bottom-water exchange processes was implemented. The recent implementation of DHSVM-R was simulation of the radionuclide wash-off from the watershed of Konoplyanka river, tributary of Dnieper River at the territory of the Pridneprovsky Chemical (uranium processing) Plant and neighboring tailings dumps. The modeling results has been used for the assessment of the watershed's 'hot spots' and analyses of the ways of the diminishing of the uranium wash off from the watersheds The results of the RUNTOX and DHSVM-R modelling of radionuclide wash-off from watersheds contaminated after the Fukushima accident are considered in comparison with the results of simulations of radionuclide fate at the watersheds of the Dnieper basin. Document available in abstract form only. (authors)