The approaches on the assessment of erosion-transport capacity of water flow at slope agro-landscapes were considered. Modern approaches suppose to use empirical and semi-empirical formulas, which applying is limited by the experiment conditions, determine transport of particles on the base of descriptive (not quantitative) characteristics of water flow and micro-stream, measure persistently different parameters of flow and stream, and don’t take into account the fundamental specifics of slope runoff hydraulics. We consider it is appropriate to use energetic approach which supposes to present hydraulic losses of water flow for overcoming the resistance of underlying surface, erosion processes, and transport of the particles making up sediments as hydrodynamic characteristic of water flow and determination of transport capacity of the flow by equation. The analysis of the equation shows that while water flow is moving over the underlying surface three regimes of its erosion-transport capacity can exist. Verification of the equation on the results of precise experimental studies of Wageningen University shows its high reliability (98.4 %).
Keywords: energetic approach, hydrodynamic characteristic, water flow, slope agro-landscapes, slopes of hydraulic losses, erosion-transport capacity.
