Time filter

Source Type

Gasteiz / Vitoria, Spain

Ibisate A.,Section of Physical Geography | Ollero A.,University of Zaragoza | Diaz E.,Section of Physical Geography
Limnetica | Year: 2011

Fluvial morphology is conditioned by three basic elements: flow regime, sediment yield and valley characteristics. These elements are controlled by factors operating at different spatial and time scales, within and outside of the basin. Moreover, the great influence of human activities has to be considered as they presently constitute one of the main hydromorphological factors. This paper synthesises the effects of different variables on fluvial morphology and structures the review around the three basic elements mentioned above with examples from the Iberian Peninsula rivers. Understanding the factors that affect channel morphology is of primary importance for assessing river habitat condition, considering that river reach characteristics are the result of the interaction between upstream and downstream catchment and local conditions. Finally, fluvial geomorphology is a key element in river ecosystems that creates geodiversity and heterogeneity of fluvial forms at different spatial scales (i.e., river habitats) and should be considered part of our natural heritage and a valuable natural element itself. © Asociación Ibérica de Limnología, Madrid. Spain.

Ollero A.,University of Zaragoza | Ibisate A.,Section of Physical Geography | Gonzalo L.E.,University of Lleida | Acin V.,Ecology and Land Ecoter | And 8 more authors.
Limnetica | Year: 2011

An updated version of the IHG index is presented. The index is based on three appraisal parameters: 1) the functional quality of the fluvial system, including a) flow regime naturalness, b) sediment supply and mobility, and c) floodplain functionality; 2) the channel quality, including a) channel morphology and planform naturalness, b) riverbed continuity and naturalness of the longitudinal and vertical processes, and c) riverbank naturalness and lateral mobility; and 3) the riparian corridor quality, including a) longitudinal continuity, b) riparian corridor width, and c) structure, naturalness and cross-sectional connectivity. © Asociación Ibérica de Limnología, Madrid. Spain.

Discover hidden collaborations