Geomorphology and Hydraulics in Steep Mountain Channels

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F17%3AA1801O17" target="_blank" >RIV/61988987:17310/17:A1801O17 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Geomorphology and Hydraulics in Steep Mountain Channels

Popis výsledku v původním jazyce

Geomorphological processes, bed morphology, and hydraulics of steep mountain channels significantly differ from typical gravel bed or meandering rivers. This chapter describes morphological, hydraulic and sediment transport aspects of first- and second-order channels with bed gradients greater than 3 % and drainage areas smaller than 10 km2. Downstream variability in channel-reach morphologies is described on the example of Montgomery-Buffington (1997) process-based classification. Several examples of flow velocity, flow resistance and bedload transport equations used for calculations in steep streams are provided and explained in detail. Uncertainties in bedload transport modelling in these streams are discussed, when local sediment transport during flood events is rather dependent on direct sediment delivery from adjacent hillslopes and individual sediment inputs (e.g., bank failures, gullies) than absolute value of flow discharge. Also note that bed material of steep streams contains high variety of particle sizes from sand to large boulder fractions. The brief summary of human interactions with mountain channels (construction of check-dams, restoration techniques) closes this chapter.

Název v anglickém jazyce

Geomorphology and Hydraulics in Steep Mountain Channels

Popis výsledku anglicky

Geomorphological processes, bed morphology, and hydraulics of steep mountain channels significantly differ from typical gravel bed or meandering rivers. This chapter describes morphological, hydraulic and sediment transport aspects of first- and second-order channels with bed gradients greater than 3 % and drainage areas smaller than 10 km2. Downstream variability in channel-reach morphologies is described on the example of Montgomery-Buffington (1997) process-based classification. Several examples of flow velocity, flow resistance and bedload transport equations used for calculations in steep streams are provided and explained in detail. Uncertainties in bedload transport modelling in these streams are discussed, when local sediment transport during flood events is rather dependent on direct sediment delivery from adjacent hillslopes and individual sediment inputs (e.g., bank failures, gullies) than absolute value of flow discharge. Also note that bed material of steep streams contains high variety of particle sizes from sand to large boulder fractions. The brief summary of human interactions with mountain channels (construction of check-dams, restoration techniques) closes this chapter.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

10508 - Physical geography

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Open Channel Hydraulics, River Hydraulic Structures and Fluvial Geomorphology: For Engineers, Geomorphologists and Physical Geographers

ISBN

978-1-498-73082-2

Počet stran výsledku

11

Strana od-do

269-279

Počet stran knihy

508

Název nakladatele

CRC Press

Místo vydání

Boca Raton, Florida

Kód UT WoS kapitoly

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