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| Titel |
Root reinforcement and slope bioengineering stabilization by Spanish Broom (Spartium junceum L.) |
| VerfasserIn |
F. Preti, F. Giadrossich |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 9 ; Nr. 13, no. 9 (2009-09-29), S.1713-1726 |
| Datensatznummer |
250012000
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| Publikation (Nr.) |
 copernicus.org/hess-13-1713-2009.pdf |
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| Zusammenfassung |
The present paper deals with the root system's characteristics of Spanish
Broom (Spartium junceum L.), a species whose capacity for adaptating
and resisting to drought is worth investigating. In particular, the aims of
the study were 1) to investigate the plant's bio-mechanical aspects and 2) to
verify whether root reinforcement and the field rooting ability of stem
cuttings enhance its potential for use in slope stabilization and soil
bio-engineering techniques, particularly in the Mediterranean areas.
Single root specimens were sampled and tested for tensile strength, obtaining
classic tensile strength-diameter relationships. Analysis were performed on
the root systems in order to assess root density distribution. The Root Area
Ratio (RAR) was analyzed by taking both direct and indirect measurements, the
latter relying on image processing. The data obtained were used to analyze
the stability of an artificial slope (landfill) and the root reinforcement.
The measurement and calculation of mean root number, mean root diameter, RAR,
root cohesion and Factor of safety are presented in order to distinguish the
effect of plant origin and propagation.
Furthermore, tests were performed to assess the possibility of agamic
propagation (survival rate of root-ball endowed plants, rooting from stem
cuttings). These tests confirmed that agamic propagation is difficult, even
though roots were produced from some buried stems, and for practical
purposes it has been ruled out.
Our results show that Spanish Broom has good bio-mechanical characteristics
with regard to slope stabilization, even in critical pedoclimatic conditions
and where inclinations are quite steep, and it is effective on soil depths up
to about 50 cm, in agreement with other studies on Mediterranean species. It
is effective in slope stabilization, but less suitable for soil
bio-engineering or for triggering natural plant succession. |
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