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Watershed Planning within a Quantitative Scenario Analysis Framework
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Greater Alpine river network evolution, interpretations based on novel drainage analysis.

Sascha Winterberg1, Sean D Willett1

  • 1Geological Institute, ETH Zürich, 8092 Zurich, Switzerland.

Swiss Journal of Geosciences
|March 28, 2020
PubMed
Summary
This summary is machine-generated.

Central Europe's major river basins, like the Danube, are changing. Analysis reveals the Danube River has lost catchment area due to historical geological events and a lack of erosional power.

Keywords:
AlpsDanube riverGeodynamicsGeomorphologyχ-map

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Area of Science:

  • Geomorphology
  • Hydrology
  • Tectonics

Background:

  • The Central European drainage system is shaped by major rivers including the Danube, Rhine, Rhône, and Po.
  • River basin geometry evolves with Alpine and Carpathian orogeny, influencing erosion and exhumation patterns.

Purpose of the Study:

  • Analyze modern river geometry to assess drainage network stability.
  • Interpret erosion and exhumation patterns based on basin geometry.
  • Identify ongoing changes and transients in river basin evolution.

Main Methods:

  • Characterize river basin geometry using metrics like chi (χ) for catchment area.
  • Quantify inter-basin relief with a catchment restricted minimum elevation (CRM) metric.
  • Map geometric stability and instability across the drainage network.

Main Results:

  • The χ-map reveals systematic, large-scale transients indicating ongoing basin changes.
  • The Danube River is losing catchment area, a significant ongoing basin change.
  • Interpreted geometric instability aligns with known river captures and morphological features.

Conclusions:

  • The Danube River's basin changes are linked to its initiation in the Alpine foreland and the formation of the Carpathians.
  • Pannonian Basin infill elongated the Danube's river basin, contributing to its instability.
  • The Danube has historically lacked erosional power, leading to capture and area loss.