Assessment of some spatial and temporal issues in landslide initiation within the Río Aguas Catchment, South–East Spain |
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| Authors: | J S Griffiths A B Hart A E Mather M Stokes |
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| Institution: | (1) School of Earth, Ocean & Environmental Science, University of Plymouth, Plymouth, UK;(2) Scott, Wilson, Kirkpatrick & Co Ltd, Basingstoke, UK;(3) School of Geography, University of Plymouth, Plymouth, UK;(4) School of Earth, Ocean & Environmental Science, University of Plymouth, Plymouth, UK |
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| Abstract: | A research programme underway in south–east Spain has the overall aim of developing a long-term landscape evolution model
for the Tertiary depositional basins that lie within the eastern part of the Betic cordillera. As part of the work it has
become apparent that there are multiple natural hazards to development in the region, and the nature and distribution of these
is presently under investigation. For one hazard, namely landsliding, a database of over 300 cases has been compiled within
one defined 425 km2 river catchment, namely the Río Aguas. Evaluation of the database has demonstrated that the contemporary distribution of
landslides correlates with areas of steepest slopes across a range of the different lithologies. However, the “slope” component
of the landscape is controlled by a wave of incision associated with a river capture event c. 100000 years ago which locally
increased erosion by between 5 and 10 times. This event was a function of differential uplift between the depositional basins
and resulted in over-steepened slopes within parts of the catchment which have yet to reach equilibrium in this evolving landscape. |
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| Keywords: | Landslides Landscape evolution River capture South– east Spain |
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