Diagnosing problems induced by past gravel mining and other disturbances in Southern European rivers: the Magra River, Italy

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• 作者：B. Belletti ; L. Nardi ; M. Rinaldi
• 关键词：Multi ; scale hierarchical framework ; Gravel ; bed river ; Channel adjustments ; Gravel mining ; Land use changes
• 刊名：Aquatic Sciences - Research Across Boundaries
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：78
• 期：1
• 页码：107-119
• 全文大小：1,931 KB
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• 作者单位：B. Belletti (1)
  L. Nardi (1)
  M. Rinaldi (1)
  
  1. Department of Earth Sciences, University of Florence, Via S. Marta 3, 50139, Florence, Italy
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Ecology
  Oceanography
  Life Sciences
  
• 出版者：Birkh盲user Basel
• ISSN：1420-9055

文摘

The multi-scale hierarchical framework developed within the REFORM project, for the study of the functioning of river reaches and their catchments, was applied to the Magra River catchment (Northern Tuscany, Italy). The Magra River is a quite dynamic gravel-bed river that has undergone severe channel adjustments over the last century (i.e. incision and narrowing). The REFORM framework was then applied in order to (1) explore the locations and causes of these adjustments, and (2) assess how different river reaches responded to specific human activities (i.e. land use changes, dams, gravel mining). The work aims at providing information to aid sustainable river management and restoration. In accordance with the framework, initially, all the relevant spatial units (i.e. from the catchment to the reach scale) were delineated and then characterised in further detail. Then, a summary of the trajectories of change following human impact was provided. Combined with an overview of the main human pressures still influencing the river system, this allowed us to define the current conditions at the river reach scale. Finally, the knowledge acquired in the previous parts was assembled to build a better understanding of current river conditions and controls on past changes, as well as to enable the formulation of some future scenarios. The latter analysis was focussed on a couple of reaches located in a sensitive and relatively low impacted segment, in order to better highlight the interpretative power of the hierarchical framework. The framework was applied by combining the knowledge derived from previous studies and the computation of additional and relevant indicators. This study demonstrated the helpfulness of the hierarchical framework in diagnosing problems and supporting management strategies for a medium-sized, gravel-bed river catchment. Keywords Multi-scale hierarchical framework Gravel-bed river Channel adjustments Gravel mining Land use changes