Structural and Hydrographic Approach to the Definition Extreme High Flow
Author(s)
I. Y. Amosova, E. A. Ilicheva
Abstract
The river network is considered as a static and dynamic model. Attention is paid to natural conditions, morphometric characteristics of the basin and channel network, which influence the formation of maximum runoff. Calculations of the maximum possible runoff were carried out using a dynamic model of the channel network, constructed using the digital relief model (DEM). To determine the fundamental patterns of the structure of river systems, based on the treatment of SRTM materials, structural and hydrographic characteristics were calculated in detail for the entire water-erosion network. The study is aimed at determining the specific characteristics and composition of the channel network and identifying new indicator capabilities for assessing runoff and the occurrence of dangerous hydrological phenomena. A comparative analysis of the obtained parameters on topographic maps and automated processing showed the importance of the scale used (topographic maps or space images) to study the structure of the water-erosion or river network for various structural hydrographic tasks. The use of modern geoinformation methods makes it possible to determine the total erosion cut and the current volume of rocks that are indicators of the hydrological regime. The indicative properties inherent in the structure of the channel network are promising to be used both for the development of flow scenarios (as much as possible), and for a retrospective assessment of the stage of development of the river system.
For citation:
Amosova I.Y., Ilicheva E.A. Structural and Hydrographic Approach to the Definition Extreme High Flow. The Bulletin of Irkutsk State University. Series Earth Sciences, 2018, vol. 23, pp. 17-27. https://doi.org/10.26516/2073-3402.2018.23.17. (in Russian)
Keywords
structural hydrography, entropy characteristics, extreme possible (maximum) runoff, hydromorphological coefficient
UDC
References
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