Routing of river flow with variable velocity: the case of the Lena river basin
A.I. Krylova1, N.A. Lapteva2
1Institute of Computational Mathematics and Mathematical Geophysics of the Siberian Branch of the RAS, Novosibirsk, Russia
2State Research Center of Virology and Biotechnology "Vector", Koltsovo, Russia
Keywords: conceptual model of river flow, routing scheme, observed hydrograph, constant and variable flow rates, heat flow
Abstract
A time-varying flow velocity method for a conceptual model of river flow generation is implemented with the aim of improving flow routing in the Lena river basin. In contrast to constant velocity models, this approach uses a time-varying velocity which depends on the amount of flow generated in a land grid cell. The Manning equation is used to estimate flow velocity in the rectangular cross-sectional approximation for the river channel. Numerical experiments with constant and variable flow velocities made it possible to compare the model flow with the observed daily hydrographs at the runoff stations of Kyusyur, Tabaga, and Verkhoyanskiy Perevoz. The work provides an estimate of the heat flow from the Lena river basin to Kyusyur gauging station for 2002-2011.
|
