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  • 1
    Electronic Resource
    Electronic Resource
    Intensive agriculture, wetlands, quarries and water management. A case study (Campo de Dalias, SE Spain) (2000)
    Springer
    Environmental geology 40 (2000), S. 163-168 
    Details
    ISSN: 1432-0495
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The intensive agricultural activities that have developed over the last 50 years in the Campo de Dalias (Almeria region) have required large quantities of gravel and clay as the basic materials for the substrate over which crops are raised. With this motive, numerous gravel pits have been opened that have extracted several million cubic metres of material in recent years. Similar quantities of clay have been extracted from the distal sectors of the alluvial fans that descend from the Sierra de Gador, and from within a large endoreic basin. In the latter quarries, some wetlands have developed, probably because of the rise in the water-table level in the aquifer over which they lie. The gravel pits are situated in the apical sectors of the alluvial fans, overlying hydrogeological units that are widely overexploited. For this reason the gravel pits could be used for artificial recharge; in addition to increasing the availability of water in the aquifer, the risk of catastrophic flooding would also be reduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540000118
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Human impact in a tourist karstic cave (Aracena, Spain) (1997)
    Springer
    Environmental geology 31 (1997), S. 142-149 
    Details
    ISSN: 1432-0495
    Keywords: Key words Tourist cave ; Human impact ; Speleothem degradation ; Biological weathering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Human intrusion on the Cave of Marvels (southwestern Spain) has produced a series of effects on the water (fall in the level of the pools due to pumping from nearby wells), the air (increased temperature and CO2 concentration as well as decreased relative humidity) and the rock. In addition, plant colonization, favored by the lighting system, has irreversibly altered numerous speleothems. The processes of degradation are especially intense in the sectors with less air volume and limited ventilation. The analysis of the cave deposits by scanning electron microscopy and thin section analysis revealed that floral pollution constitutes one of the most aggressive agents against the calcite and aragonite precipitates, being responsible for biochemical and biophysical degradation of the first order.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050173
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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