Influence of Deposition of Fine Plant Debris in River Floodplain Shrubs on Flood Flow Conditions - the Warta River Case Study

Publication date: Available online 21 December 2015 Source:Physics and Chemistry of the Earth, Parts A/B/C Author(s): Robert Mazur, Tomasz Kałuża, Joanna Chmist, Natalia Walczak, Ireneusz Laks, Paweł Strzeliński This paper presents problems caused by organic material transported by flowing water. This material is usually referred to as plant debris or organic debris. Its composition depends on the characteristic of the watercourse. For lowland rivers, the share of the so-called small organic matter in plant debris is considerable. This includes both various parts of water plants and floodplain vegetation (leaves, stems, blades of grass, twigs, etc.). During floods, larger woody debris poses a significant risk to bridges or other water engineering structures. It may cause river jams and may lead to damming of the flowing water. This, in turn, affects flood safety and increases flood risk in river valleys, both directly and indirectly. The importance of fine plant debris for the phenomenon being studied comes down to the hydrodynamic aspect (plant elements carried by water end up on trees and shrubs, increase hydraulic flow resistance and contribute to the nature of flow through vegetated areas changed from micro-to macro-structural). The key part of the research problem under analysis was to determine qualitative and quantitative debris parameters and to establish the relationship between the type of debris and the type of land use of river valleys (crop fi...
Source: Physics and Chemistry of the Earth, Parts ABC - Category: Science Source Type: research
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