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| Titel |
Effects of black carbon on aggregate stability, runoff generation, splash erosion and slopewash of a clay loam under simulated rainfall |
| VerfasserIn |
Steve Aston, Stefan Doerr, Alayne Street-Perrott |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250082876
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| Zusammenfassung |
| Black (pyrogenic) carbon (BC) was produced from native hardwoods pyrolysed in a ring kiln
at ~400Ë C and ground and sieved to < 2 mm. The BC was then added to a clay
loam (sieved to 3.35 mm remaining. After 200 days of incubation,
the remainder of each sample was air-dried and sieved to < 5 mm. Each sample
was then placed in a square plot and subjected to 40 minutes of simulated rainfall.
Runoff and subsurface drainage were measured at 2 minute intervals and runoff was
collected at 5 minute intervals to enable subsequent determination of sediment
concentrations, sediment yields and erosion rates of soil and BC. Splash cups were placed on
each side of the plot to allow measurement of overall splash detachment for each
simulation.
A BC content of 5g kg-1 did not affect the mean aggregate stability of the clay loam, but
a content of 25 g kg-1 led to a decrease in mean aggregate stability of >40%, with a further
significant reduction observed when the BC content was 50 g kg-1. There were no
statistically significant changes in aggregate stability between 50, 100 and 150
days of incubation for any of the application rates. Results showing the effects
of BC on runoff generation, splash erosion and slopewash will also be presented. |
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