Detailed Information on Publication Record
2004
The formation of spherical clay balls on the slopes of sandpit quarry, the Rudice-Sec (Czech Republic)
FAIMON, Jiří and Slavomír NEHYBABasic information
Original name
The formation of spherical clay balls on the slopes of sandpit quarry, the Rudice-Sec (Czech Republic)
Name in Czech
Tvorba sférických závalků na svazích pískového lomu, Rudice-Seč (ČR)
Authors
FAIMON, Jiří (203 Czech Republic, guarantor) and Slavomír NEHYBA (203 Czech Republic)
Edition
Catena, Elsevier, 2004
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
Netherlands
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Science
UT WoS
000223391900002
Keywords (in Czech)
závalky; pukliny; roklinová eroze; děšťové srážky; tvarování; sfericita; transport
Keywords in English
Clay balls; Cracks; Gully erosion; Rainfall; Shaping; Sphericity; Transport
Tags
International impact, Reviewed
Změněno: 23/9/2009 15:29, doc. Ing. Jiří Faimon, Dr.
V originále
Clays on the steep slopes of a small artificial sedimentary basin (sandpit quarry) alternately desiccate/crack and erode during hot dry and rainy seasons, respectively. Small irregular blocks of clay (IBC) predefined by cracks are released by gully erosion. The IBCs are quickly transported to the slope base and then rolled down the basin bottom by runoff. Due to rotation about a randomly changing axis and under an effect of deformation forces, the IBCs are transformed into spherical clay balls (SCB). The SCBs are transported, in general, towards the depositional base where they are buried by assorted sandy/clayey sediment. As soon as the kinetic energy of the runoff has decreased, the SCBs remain spread along transport path. From their distribution, the shaping process was evaluated. Based on data processing, the dependency, Psí = 1-{1-Psí(0)}x10^{-8.9E-5 lambda/d(ef)} relating the clay ball projection sphericity, Psí, to the effective diameter, d(ef), and to the distance from the steep slope base, lambda, was found. Based on this equation, the length of clay ball transport can be estimated if the projection sphericity and effective diameter are known.
In Czech
Clays on the steep slopes of a small artificial sedimentary basin (sandpit quarry) alternately desiccate/crack and erode during hot dry and rainy seasons, respectively. Small irregular blocks of clay (IBC) predefined by cracks are released by gully erosion. The IBCs are quickly transported to the slope base and then rolled down the basin bottom by runoff. Due to rotation about a randomly changing axis and under an effect of deformation forces, the IBCs are transformed into spherical clay balls (SCB). The SCBs are transported, in general, towards the depositional base where they are buried by assorted sandy/clayey sediment. As soon as the kinetic energy of the runoff has decreased, the SCBs remain spread along transport path. From their distribution, the shaping process was evaluated. Based on data processing, the dependency, Psí = 1-{1-Psí(0)}x10^{-8.9E-5 lambda/d(ef)} relating the clay ball projection sphericity, Psí, to the effective diameter, d(ef), and to the distance from the steep slope base, lambda, was found. Based on this equation, the length of clay ball transport can be estimated if the projection sphericity and effective diameter are known.
Links
| MSM 143100004, plan (intention) |
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