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| Titel |
Monitoring of riparian vegetation response to flood disturbances using terrestrial photography |
| VerfasserIn |
K. Džubáková, P. Molnar, K. Schindler, M. Trizna |
| 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 ; 19, no. 1 ; Nr. 19, no. 1 (2015-01-13), S.195-208 |
| Datensatznummer |
250120588
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| Publikation (Nr.) |
 copernicus.org/hess-19-195-2015.pdf |
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| Zusammenfassung |
| Flood disturbance is one of the major factors impacting riparian vegetation
on river floodplains. In this study we use a high-resolution ground-based
camera system with near-infrared sensitivity to quantify the immediate
response of riparian vegetation in an Alpine, gravel bed, braided river to
flood disturbance with the use of vegetation indices. Five large floods with
return periods between 1.4 and 20.1 years in the period 2008–2011 in the
Maggia River were analysed to evaluate patterns of vegetation response in
three distinct floodplain units (main bar, secondary bar, transitional zone)
and to compare the sensitivity of seven broadband vegetation indices. The
results show both a negative (damage) and positive (enhancement) response of
vegetation within 1 week following the floods, with a selective impact
determined by pre-flood vegetation vigour, geomorphological setting and
intensity of the flood forcing. The spatial distribution of vegetation damage
provides a coherent picture of floodplain response in the three floodplain
units. The vegetation indices tested in a riverine environment with highly
variable surface wetness, high gravel reflectance, and extensive
water–soil–vegetation contact zones differ in the direction of predicted
change and its spatial distribution in the range 0.7–35.8%. We conclude
that vegetation response to flood disturbance may be effectively monitored by
terrestrial photography with near-infrared sensitivity, with potential for
long-term assessment in river management and restoration projects. |
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