Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists from the University of Granada prove that rivers do not act as barriers for groundwater flow

15.11.2007
The research team from the Geodynamics Department at the University of Granada and the Spanish Institute of Geology and Mining (which is part of the Spanish Ministry of Education and Science) has studied the hydrogeology of the karst aquifers in the Mediterranean climate. It has been found that, contrary to popular belief, rivers do not act as insurmountable barriers for groundwater flow.

This pioneering study was carried out by Antonio González Ramón and directed by doctors Manuel López Chicano and Juan Carlos Rubio Campos. They based their research on the karst aquifer situated in the Pegalajar and the Mojón Blanco ranges. It occupies the northern side of the Betica mountain range and was provisionally declared overexploited in 1992 because of the complete drying up of the La Reja spring - whose source is situated in the centre of the village of Pegalajar - due to the exploitation of the water resources in order to supply the villages of Mancha Real, Pegalajar and La Guardia, which are all situated in the province of Jaén, Spain.

These scientists have proven that important rivers such as Guadalbullón are not insurmountable barriers for groundwater flows, as previously believed. The analysis of piezometric, hydrochemical and isotopic data from groundwater flows revealed that they cross the Guadalbullón River from one bank to the other due to a certain geological structure which prevents the groundwater from being influenced by the river flow.

The analysed data
This research is based on the analysis of environmental isotopes, and both piezometric and hydrochemical data collected from the aquifers located in the Pegalajar and the Mojón Blanco ranges and from others nearby, in addition to the piezometric information available and the information added by previous studies carried out by several administration bodies. The analysis of all this information has made it possible to create a new hydrogeological model which explains most of the current mysteries. It has also made it possible to accurately identify which water resources depend on these aquifers and to design a new exploitation model which does not affect important springs such as the one at La Reja.

“The hydrogeological model which results from this research has been a useful basis for the development of a programme which controls the exploitation of the Mancha Real – Pegalajar aquifer. This programme aims to solve the social problems related to the exploitation of the groundwater in that area,” according to the author of this study.

After having proven their success, some measures included in this programme have already been put into practice. Also, other measures are being implemented in order to restore the spring of La Reja. The research carried out at the University of Granada has shown the importance of accurate knowledge of geological structures to explain the stages of storage and circulation of groundwater in karst aquifers severely folded and fractured.

Antonio Marín Ruiz | alfa
Further information:
http://prensa.ugr.es/prensa/research/index.php

More articles from Earth Sciences:

nachricht Stagnation in the South Pacific Explains Natural CO2 Fluctuations
23.02.2018 | Carl von Ossietzky-Universität Oldenburg

nachricht First evidence of surprising ocean warming around Galápagos corals
22.02.2018 | University of Arizona

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>