 |
| Titel |
Creating a catchment scale perspective for river restoration |
| VerfasserIn |
L. Benda, D. Miller, J. Barquín |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 9 ; Nr. 15, no. 9 (2011-09-27), S.2995-3015 |
| Datensatznummer |
250012967
|
| Publikation (Nr.) |
 copernicus.org/hess-15-2995-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| One of the major challenges in river restoration is to identify the natural
fluvial landscape in catchments with a long history of river control.
Intensive land use on valley floors often predates the earliest remote
sensing: levees, dikes, dams, and other structures alter valley-floor
morphology, river channels and flow regimes. Consequently, morphological
patterns indicative of the fluvial landscape including multiple channels,
extensive floodplains, wetlands, and fluvial-riparian and
tributary-confluence dynamics can be obscured, and information to develop
appropriate and cost effective river restoration strategies can be
unavailable. This is the case in the Pas River catchment in northern Spain
(650 km2), in which land use and development have obscured the natural
fluvial landscape in many parts of the basin. To address this issue we used
computer tools to examine the spatial patterns of fluvial landscapes that
are associated with five domains of hydro-geomorphic processes and
landforms. Using a 5-m digital elevation model, valley-floor surfaces were
mapped according to elevation above the channel and proximity to key
geomorphic processes. The predicted fluvial landscape is patchily
distributed according to hillslope and valley topography, river network
structure, and channel elevation profiles. The vast majority of the fluvial
landscape in the main segments of the Pas River catchment is presently
masked by human infrastructure, with only 15% not impacted by river
control structures and development. The reconstructed fluvial landscape
provides a catchment scale context to support restoration planning, in which
areas of potential ecological productivity and diversity could be targeted
for in-channel, floodplain and riparian restoration projects. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|