J 2005

Shaping of clay fragments during transport: a theoretical model

FAIMON, Jiří

Basic information

Original name

Shaping of clay fragments during transport: a theoretical model

Name in Czech

Tvarování jílových závalků během transportu: teoretický model

Authors

FAIMON, Jiří (203 Czech Republic, guarantor)

Edition

Geologica Carpathica, Bratislava, SAV, 2005, 1335-0552

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

Slovakia

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 0.449

RIV identification code

RIV/00216224:14310/05:00031152

Organization unit

Faculty of Science

UT WoS

000234072400006

Keywords (in Czech)

Česká republika; Rudické vrstvy; modelování; recentní procesy; sedimentologie; dno sedimentačního bazénu; jílový závalek

Keywords in English

Czech Republic; Rudice Formation; modelling; recent process; sedimentology; basin bed; clay ball

Tags

Tags

International impact, Reviewed
Změněno: 24/9/2009 09:53, doc. Ing. Jiří Faimon, Dr.

Abstract

ORIG CZ

V originále

Irregular blocks of cohesive clay (IBC) are transformed into spherical clay balls (SCB) during transport across a sedimentary basin bed by runoff. This transformation is controlled by rotation of the IBC about a randomly changing axis. During this process, deformation dominates; abrasion is less significant. Based on a theoretical model, the equation describing SCB formation, was derived in terms of the SCB instantaneous sphericity, Y, the IBC initial sphericity, Y0, the transport length, l, and the effective diameter, def. The equation was validated with the new data set obtained from IBC/SCB distribution along the transport path on the bed of an artificial basin (sandpit quarry). The coefficient k was found to be 2.9x10-4 and 4.8x10-4 for the shaping of two kinds of clays, respectively. Based on the proposed model, the length of transport can be estimated if sphericity and effective diameter are known. Despite the verification in the artificial setting, the presented model is valid also for the natural environment of various clay rich cliffs or scarps.

In Czech

Irregular blocks of cohesive clay (IBC) are transformed into spherical clay balls (SCB) during transport across a sedimentary basin bed by runoff. This transformation is controlled by rotation of the IBC about a randomly changing axis. During this process, deformation dominates; abrasion is less significant. Based on a theoretical model, the equation describing SCB formation, was derived in terms of the SCB instantaneous sphericity, Y, the IBC initial sphericity, Y0, the transport length, l, and the effective diameter, def. The equation was validated with the new data set obtained from IBC/SCB distribution along the transport path on the bed of an artificial basin (sandpit quarry). The coefficient k was found to be 2.9x10-4 and 4.8x10-4 for the shaping of two kinds of clays, respectively. Based on the proposed model, the length of transport can be estimated if sphericity and effective diameter are known. Despite the verification in the artificial setting, the presented model is valid also for the natural environment of various clay rich cliffs or scarps.

Links

MSM0021622412, plan (intention)
Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)
Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)