The developed (graded) longitudinal profile simulation in the river section (a case study of the Upper Oka River)

Abstract

A method of simulating the developed longitudinal profile for a selected river section is proposed. The method is based on the concept of a longitudinal river profile, developed by N.I. Makkaveev. The developed longitudinal profile of the Oka River is calculated from the city of Kaluga to the Beloomut lock/dam. The calculation is performed using an equation of non-uniform flow motion and one of the developed longitudinal profile stage criteria – the constancy of the QI product along the river section (Q is average multiannual water discharge, I is a hydraulic slope). The obtained results show that the developed longitudinal profile of the water surface can serve as an important indicator of the trends of channel processes, not only in theoretical studies but also in solving practical problems of hydrological surveys, for example, when calculating the profile of terminal erosion, assessing the possible lowering of water levels.