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| Titel |
Scale effect on runoff and soil loss control using rice straw mulch under laboratory conditions |
| VerfasserIn |
S. H. R. Sadeghi, L. Gholami, E. Sharifi, A. Khaledi Darvishan, M. Homaee |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 6, no. 1 ; Nr. 6, no. 1 (2015-01-05), S.1-8 |
| Datensatznummer |
250115383
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| Publikation (Nr.) |
 copernicus.org/se-6-1-2015.pdf |
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| Zusammenfassung |
| Amendments can control the runoff and soil loss by protecting the soil surface.
However, scale effects on runoff and soil loss control have not been
considered yet. The present study has been formulated to determine the
efficiency of two plot sizes of 6 and 0.25 m2 covered by 0.5 kg m−2 of straw mulch with regard to changing the time to runoff, runoff
coefficient, sediment concentration and soil loss under laboratory
conditions. The study used a sandy-loam soil taken from
summer rangeland, Alborz Mountains, northern Iran, and was conducted under simulated rainfall
intensities of 50 and 90 mm h−1 and in three replicates. The results of
the study showed that the straw mulch had a more significant effect on reducing the runoff coefficient, sediment concentration and soil loss on a
0.25 m2 plot scale. The maximum effectiveness in time to runoff for
both the scales was observed at a rainfall intensity of 90 mm h−1. The
maximum increasing and decreasing rates in time to runoff and runoff
coefficient were observed at a rainfall intensity of 90 mm h−1, with 367.92 and 96.71% for the 0.25 m2 plot and 110.10 and 15.08% for the 6 m2 plot. The maximum
reduction in the runoff coefficient was in the 0.25 m2 plot for the two rainfall
intensities of 50 and 90 mm h−1, with rates of −89.34 and
−96.71%. The maximum change in soil loss at the intensities of both 50
and 90 mm h−1 occurred in the 0.25 m2 plot, with 100%, whereas in the 6 m2 plot, decreasing rates of soil loss for the intensities of both 50 and 90 mm h−1 were 46.74 and 63.24%,
respectively. |
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