Journal Title
Title of Journal: Hydrogeol J
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Abbravation: Hydrogeology Journal
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Publisher
Springer-Verlag
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Authors: H Aguilera S Castaño L Moreno M E JiménezHernández A de la Losa
Publish Date: 2013/01/10
Volume: 21, Issue: 3, Pages: 623-641
Abstract
Las Tablas de Daimiel National Park TDNP in Spain is one of the most important semiarid wetlands of the Mediterranean area The inversion of the regional groundwater flow primarily due to overexploitation and inadequate aquifer management has led to degradation The system has turned from a groundwater discharge zone into a recharge zone and has remained mostly dry since the 1980s High heterogeneity and complexity enhanced by anthropogenic management action hampers prediction of the surface–groundwater system response to flooding events This study analyses these interactions and provides empirical evidence to define a conceptual model of floodinginfiltrationgroundwater dynamics through the application of a few simple analysis tools to basic hydrological data Relevant surface water–groundwater interactions are mainly localized in the left west margin of TDNP as confirmed by the fast responses to flooding observed in the hydrochemic hydrodynamic and isotopic data During drying periods small artificial and/or lowflow natural floods are followed by infiltration of evaporated poorquality ponding water into saline lowpermeability layers The results allow an improved understanding of the hydrological behaviour essential to support efficient management practices The relative simplicity of the methodology allows for its application in other similar complex groundwaterlinked wetlands where detailed knowledge of local geology is still absentLas Tablas de Daimiel National Park TDNP en Espagne est l’une des plus importantes zones humides semiarides de la région méditerranéenne L’inversion de l’écoulement régional des eaux souterraines principalement en raison d’une surexploitation et d’une gestion inadaptée a conduit à sa dégradation Le système a évolué d’une zone de décharge à une zone de recharge et est resté la plupart du temps sec depuis les années 80 Sa grande hétérogénéité et sa complexité renforcées par les actions de gestion entravent la modélisation de la réponse du système eaux de surface–eaux souterraines face aux inondations Cette étude analyse ces interactions et fournit des critères empiriques afin de définir un modèle conceptuel dynamique inondationinfiltrationeaux souterraines utilisant quelques outils d’analyse simples à base de données hydrologiques Les interactions eaux de surface–eaux souterraines pertinentes sont principalement localisées dans la partie gauche ouest de la TDNP tel que le confirment les réponses rapides aux inondations observées grâce aux données hydrochimiques hydrodynamiques et isotopiques Pendant les périodes sèches les crues de faibles débits artificielles et/ou naturelles sont suivies par une infiltration d’eau évaporée de mauvaise qualité dans les couches salées de faible perméabilité Les résultats permettent une meilleure compréhension du comportement hydrologique essentielle pour assurer une gestion efficace La relative simplicité de la méthode permet son application dans d’autres complexes eaux souterraineszones humides similaires où une connaissance détaillée de la géologie locale est encore absenteEl Parque Nacional de Las Tablas de Daimiel TDNP en España es uno de los más importantes humedales semiáridos del área Mediterránea La inversión del flujo regional de agua subterránea principalmente debido a la sobreexplotación y a un manejo inadecuado del acuífero ha llevado a la degradación El sistema se convertido de ser una zona de descarga de agua subterránea a una zona de recarga y ha permanecido mayormente seco desde los 80 La alta heterogeneidad y complejidad enriquecida por las acciones de manejo antropogénico dificulta la predicción de la respuesta del sistema de aguas superficiales–aguas subterráneas a eventos de inundación Este estudio analiza estas interacciones y provee evidencias empíricas para definir un modelo conceptual de la dinámica agua subterránea–infiltración–inundación a través de la aplicación de unas pocas herramientas simples de análisis para datos hidrológicos básicos Las interacciones agua superficial–agua subterránea relevantes están principalmente localizadas en la margen izquierda oeste del TDNP según fue confirmado por las rápidas respuestas a las inundaciones observadas en los datos hidroquímicos hidrodinámicos e isótopos Durante los períodos secos las pequeñas inundaciones artificiales y/o las inundaciones naturales de bajo flujo son seguidas por infiltración en bajos de agua de pobre calidad evaporadas en capas salinas de baja permeabilidad Los resultados permiten una mejor comprensión del comportamiento hidrológico esencial para sustentar prácticas eficientes de manejo La relativa simplicidad de la metodología permite su aplicación en otros humedales complejos similares vinculados por el agua subterránea donde el conocimiento detallado de la geología local está aún ausente西班牙Las Tablas de Daimiel国家公园TDNP是地中海地区最重要的半干旱湿地之一。由于过度开采和不恰当的含水层管理区域地下水流的转化已经导致了地下水的退化。区域地下水系统已由排泄区变为了补给区而且自20世纪80年代以来此地区的地下水一直保持着几乎干涸的水平。水文地质条件高度的非均质性和复杂性加之人工管理措施的干扰阻碍着对地表水地下水系统对洪水事件的相应的预测。本次研究分析了这些相互作用通过应用一些简单的分析工具对基础的水文数据进行处理为定义洪水入渗地下水动态的概念模型提供了经验性的证据。正如在水化学、水文动态和同位素数据中观察到的对洪水的快速响应所证实的相关的地表水地下水相互作用主要发生在TDNP的左侧西部边缘。在旱季在小规模的人工的或低流量的自然洪水之后蒸发的劣质池塘水渗入低渗透性的咸水层。本次研究的结果增强了对支持有效率的管理实践至关重要的水文行为的理解。考虑到当缺乏详细的区域地质资料时在其它与之相似的复杂的与地下水有联系的湿地应用此种方法相对简单。O Parque Nacional de Las Tablas de Daimiel PNTD em Espanha é uma das zonas húmidas semiáridas mais importantes da área mediterrânica A inversão do escoamento regional de águas subterrâneas principalmente devido a sobreexploração e a gestão inadequada do aquífero conduziu à sua degradação O sistema tornouse de uma zona de descarga de águas subterrâneas numa zona de recarga e permaneceu maioritariamente seco desde os anos 1980 Heterogeneidade e complexidade altas realçadas por ação de gestão antropogénica dificultam a previsão da resposta do sistema águas superficiaiságuas subterrâneas aos eventos de cheia Este estudo analisa estas interações e dá evidências empíricas para definir um modelo conceptual da dinâmica de cheiainfiltração de águas subterrâneas através da aplicação de algumas ferramentas de análise simples a dados hidrológicos básicos As interações águas superficiaiságuas subterrâneas relevantes localizamse principalmente na margem esquerda ocidental do PNTD como confirmado pelas respostas rápidas às cheias observadas nos dados hidroquímicos hidrodinâmicos e isotópicos Durante períodos de seca algumas cheias artificiais e/ou naturais de baixo fluxo são seguidas por infiltração de água de encharcamento evaporada de pobre qualidade para camadas de baixa permeabilidade salinas Os resultados permitem uma compreensão melhorada do comportamento hidrológico essencial para apoiar práticas de gestão eficientes A simplicidade relativa da metodologia permite a sua aplicação a outras zonas húmidas complexas similares ligadas a águas subterrâneas onde o conhecimento detalhado da geologia local ainda esteja ausenteThis research has been financed by the CICYT projects CGL200506458C0201 and CGL200913507 It has also benefited from the Collaborative Agreement for the Joint Laboratory IGMECEDEX of Isotopic Hydrology with special acknowledgement to the manager of this laboratory María Fe DíazTeijeiro Special thanks must be given to the IGME staff and to Las Tablas de Daimiel National Park Direction for the provided data and all the facilities and support for access and sampling The authors would also to thank journal editors and reviewers whose comments and suggestions significantly enhanced the quality of the report
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