Guadalentín River basin, Spain

Description

8 Guadalentin-River-Spain

The Guadalentín River is located in southeast Spain and is a major tributary of the Segura River, one of the largest Mediterranean basins in Spain. Semiarid climatic conditions are characterized average annual precipitation of 250 mm/yr and 17º C of average temperatures. The Guadalentín Basin is characterized by a nearly flat valley bottom with series of well-developed alluvial fans. It is occupied by the Alto Guadalentín aquifer, which is bounded on the northeast and on the south-east by fault systems. The basement beneath the aquifer is composed of several relatively impermeable Paleozoic metamorphic complexes overlain by permeable Miocene conglomerate and/or calcarenite series. The top of the succession comprises Pliocene–Quaternary, low-permeability, compressible conglomerates, sand, silt, and clays. Historically, piezometric levels were near land surface with development of artesian wells and permanent lagoons. Since the 1960s-1970s, the Guadalentín Basin aquifer has has been exploited intensely, leading to  a spatially variable continuous piezometric level decrease. Recent drought periods from 1990 to 1995,  and 2005–2008 reduced natural recharge and increased pumping in the Guadalentín Basin, which led to an increased resources deficit. The ERS and ENVISAT ground deformation data indicates large scale deformation and in particular the discovery of the highest rates of groundwater-related land subsidence recorded in Europe (> 10 cm/yr). The occurrence of Lorca earthquake that caused 9 fatalities, and the recently published possible correlation with ground water extraction requires more research on this complex phenomenon.

Physiographic setting

Flat valley bottom with series of well-developed alluvial fans.

Relevant phenomena

Floodings (with over 2000 fatalities documented during the last 250 yr), earthquakes (with 9 fatalities on the May 11th 2011 earthquake), subsidence due to ground water extraction, and erosive processes (piping)

 

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Dissemination

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Brochures

2010-DORIS-brochure

2010 EC DORIS brochure


Prepared by the EC in 2010 to advertise the DORIS project: Ground Deformations Risk Scenarios: an Advanced Assessment Services.

 

2011-DORIS-brochure

2011 DORIS brochure


Prepared by the team to advertise the DORIS project. The article appeared in the journal INTERNATIONAL INNOVATION in October 2011

 

2012-DORIS-brochure

2012 DORIS brochure


the significance of ground deformations to human populations and how satellite-based SAR sensors provide new ways of monitoring and forecasting their progress

2013-DORIS-final-brochure

2013 DORIS brochure


DORIS project final brochure

 

 

2013-DORIS-brocure-2

2013 DORIS brochure


Using GMES to map and monitor landslides and ground subsidence

 

 

 

2013-DORIS-cordis-brochure

2013 DORIS brochure


Beyond the Sky - Space Research 
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