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Environmental Impact of Human Activities on Water Resources and Its Characterization for Management and Planning of Natural Areas “Las Batuecas-Sierra Francia” and “Quilamas” (Salamanca, Spain)
No full textIntroduction: Considering Institutional frameworks and institutional reforms in trading. Part 3: Reforms to overcome legal and institutional barriers to trading
No full textA review of dendrogeomorphological research applied to flood risk analysis in Spain
No full textOver the last forty years, applying dendrogeomorphology to palaeoflood analysis has improved estimates of the frequency and magnitude of past floods worldwide. This paper reviews the main results obtained by applying dendrogeomorphology to flood research in several case studies in Central Spain. These dendrogeomorphological studies focused on the following topics: (1) anatomical analysis to understand the physiological response of trees to flood damage and improve sampling efficiency; (2) compiling robust flood chronologies in ungauged mountain streams, (3) determining flow depth and estimating flood discharge using two-dimensional hydraulic modelling, and comparing them with other palaeostage indicators; (4) calibrating hydraulic model parameters (i.e. Manning roughness); and (5) implementing stochastic-based, cost–benefit analysis to select optimal mitigation measures. The progress made in these areas is presented with suggestions for further research to improve the applicability of dendrogeochronology to palaeoflood studies. Further developments will include new methods for better identification of the causes of specific types of flood damage to trees (e.g. tilted trees) or stable isotope analysis of tree rings to identify the climatic conditions associated with periods of increasing flood magnitude or frequency
La participación comunitaria como elemento clave en la gestión: Parque Nacional Viñales, Cuba
No full textLa condición de destino turístico en el extremo occidental del país, unido a la influencia de las actividades agrícolas y forestales que se desarrollan en las zonas
de amortiguamiento, ejercen una considerable presión antrópica que amenaza la integridad ecológica de los ecosistemas que se conservan en el Parque Nacional Viñales. Esta amenaza constante ha llevado a la administración a integrar iniciativas para el desarrollo sostenible a partir de la gestión participativa de todos los sectores de la población e instituciones locales. En el presente trabajo se exponen las experiencias dirigidas a mejorar la calidad de vida y el uso sostenible de los recursos, al tiempo que se introducen nuevos elementos dentro del producto turístico
del destino Viñales, que apuntan a fortalecer la identidad y autenticidad local del área. Los resultados obtenidos se agrupan en las siguientes fases: identificación de
potencialidades locales; capacitación y extensionismo; creación de infraestructuras; validación y puesta en práctica en actividades de uso público; así como la evaluación y control administrativo
Integration of EPIs with policy instruments adopted in other sectors such as agriculture and energy.EPI-WATER Discussion Paper no. 04.
No full textEstimation of Water Excess in the Medium and High Basins of Yanuncay River (Cuenca-Ecuador) by Approximation of Monthly: Distributed Water Balance
No full textResponse of microcrustacean communities from the surface—groundwater interface to water contamination in urban river system of the Jarama basin (central Spain)
No full textIn order to evaluate the water quality at the surface/groundwater interface (hyporheic zone), the pattern of microcrustacean assemblages in response to environmental stress caused by urban industrial contamination was studied in the Jarama River basin (central Spain) during high water discharges (March and April 2011). The clustering of biological variables and the concentration of urban contaminants in hyporheic waters showed that pristine hyporheic waters have moderate species diversity (two to seven species) and dominance of k strategist stygobites, whereas excessively contaminated sites are devoid by crustaceans. An intermediate level of disturbance in hyporheic waters is associated with a peak of species taxonomic diversity (four to nine species) and proliferation of r strategist more tolerant species. Typical species found in hyporheic zone, e.g., Paracyclops imminutus (Copepoda, Cyclopoida), Cryptocandona vavrai (Ostracoda) and Herpetocypris chevreuxi (Ostracoda), were good indicators of high concentrations of Cr, Mn, Ni, Cd, Pb and VOCs; whereas the stygobites do not show any significant correlation. The effectiveness of hyporheic crustaceans as efficient bioindicators for assessing the current ecological status of river ecosystems is emphasised
Introduction: Incentives and prices in water trading. Part 4: Can we get incentives right?
No full textMetodología para el desarrollo de un modelo hidrogeológico mediante herramientas de Información Geográfica
No full textThe Mazarrón basin, SE Spain: a study of mineralization processes, evolving magmatic series, and geothermal activity
No full textThe Miocene to Present Mazarrón basin provides a window on the metallogenic role of an evolving magmatic series. High-K calc–alkaline magmas gave rise to an important cluster of Pb–Zn–Ag–Cu vein and stockwork deposits emplaced in dacitic to rhyodacitic domes, part of a complex volcanic–metallogenic province (Au, Hg, Pb–Zn–Cu–Ag, Sn) stretching for 150 km along the Mediterranean coast of SE Spain. By Pliocene time the former magmatic series had been replaced by intraplate alkaline basaltic volcanism, thus becoming the southern branch of the Western/Central Europe alkaline province. In terms of base metal sulphide deposits, this European province is barren, although it triggered widespread, CO2-rich geothermal activity. Modern geothermal activity at El Saladillo (Mazarrón) resulted in the deposition of carbonate sinter deposits and formation of microbial mats. Proximal facies consist of millimetric to centimetric multicoloured layers of microbial mats, including yellow-orange thin bands of calcified bacteria and mineral growths of aragonite and calcite; green layers of live thermophilic Lyngbya-type cyanobacteria; black, degraded organic matter; and pyrite as the sole sulphide phase. Except for arsenic (37–63 μg g−1), all of the studied trace elements (Ag, Ba, Bi, Cd, Cu, Pb, Sb, Se, and Sn) appear in remarkably low concentrations in the geothermal sinters. This is consistent with compositional data for the El Saladillo waters, with no significant metal concentrations. We present the first conceptual model (Miocene to Present) for the ore-forming processes, magmatism, CO2 degasification, and geothermal activity for this realm. We argue that the time- and space-limited character of this volcanism (small, scattered outcrops), the deep magma emplacement level, the metal sulphide behaviour in alkaline basaltic magmatic chambers, and the dry character of these magmas prevented any metallogenic interaction between the chambers and the much shallower meteoric waters that drove the El Saladillo geothermal system and others of the same kind in Spain and elsewhere in Europe