Suchergebnisse

El estudio comienza analizando la transformación de los usos del suelo en el espacio que comprende la cuenca hidrográfica del arroyo Riopudio, en el Aljarafe sevillano, con especial atención a los nuevos usos de naturaleza urbana y la consiguiente impermeabilización de los suelos. Posteriormente se investiga acerca de las Áreas de Oportunidad que prevé el Plan de Ordenación del Territorio de la Aglomeración Urbana de Sevilla, concretamente las que se localizan total o parcialmente sobre la superficie delimitada para el estudio, con el fin de aproximarnos en la medida de lo posible al nuevo aumento de superficie sellada que conllevaría la ejecución de dichas figuras del planeamiento territorial. Para ello se aplican criterios y estándares urbanísticos contemplados en la legislación vigente. Se estudia también, de manera conceptual, de qué forma la expansión urbana desarrollada en nuestro territorio en las últimas décadas afecta a las dinámicas hidrológicas de los sistemas fluviales a escala de cuenca, con el fin de poder trasladarlo posteriormente a nuestro caso de estudio y analizar de qué forma esos impactos se han desarrollado o no sobre el arroyo en cuestión. Finalmente, se propone la implantación de Sistemas Urbanos de Drenaje Sostenible como forma eficaz y eficiente de reducir los impactos que la impermeabilización del suelo genera sobre las dinámicas hidrológicas de los sistemas fluviales y, en última instancia, el ciclo natural del agua. ; The study begins by analyzing the transformation of land uses in the area that includes the hydrographic basin of the Riopudio watercourse, in the Aljarafe, province of Seville, with special attention to the new urban development processes and the subsequent sealing of soils. Then, the we investigate about the so called 'Opportunity Areas' (OOAA) proposed by the Urban Agglomeration of Seville Land Use Plan; we focus specifically on the OOAA located totally or partially in the case study area, in order to evaluate the new increase in sealed surface that would entail the execution of the land use planning contents. For this purpose, the urban criteria and standards contemplated in current legislation are applied. This work also studies, in a conceptual way, how urban expansion developed in recent decades affects hydrological dynamics of fluvial systems at the basin scale, in order to transfer it later to our case study and analyze at what degree these impacts have occurred in this concrete river basin. Finally, the implementation of Urban Sustainable Drainage Systems is proposed as an effective and efficient way to reduce the impacts that soil impermeability generates on the hydrological dynamics of river systems and, ultimately, on the natural water cycle.

For more than 40 years, the industrial complex which developed near Huelva (in SW Spain) produced a huge amount of phosphogypsum as a waste product of manufacturing fertilizers. This waste was stockpiled in a stack 25 m high, covering 1200 ha of what was once a salt marsh. The weight of that enormous amount of waste produced active subsidence in the underlying sediment. Part of the sediment was injected into the marginal areas, where the load pressure is minor, causing significant vertical movement in the floor of the estuarine channel. This manuscript describes several surficial features using multibeam echosound. A crest formed by cones and a bulge area could be interpreted as injection structures. The evolution of the topographic position of the floor was also analyzed by comparing different records of the estuarine bed in the margins of the stockpile. The data in this work document the changes in the dynamics of the estuary in relation to these vertical movements. These changes in dynamicsled to erosion and deposition in various areas of the bed ; This research was funded by the project "Balsas de Fosfoyesos", Especial action 2017–2020 of the Junta de Andalucia (Regional government): General Direction of Universities and co-funded by the Ayuntamiento de Huelva (City Council of Huelva). We strongly acknowledge the technical support given by A. Palmeiro from Nautilus Oceanica S.L., who filtered and processed the multibeam records. We also acknowledge the comments of three anonymous reviewers who contributed to substantially improving this article. The help of Alastair Peacocke regarding the English language also improved the original manuscrip

A newly discovered prehistoric stela from Cañaveral de León (Huelva, Spain) is studied through a combination of scientific methods, including thin section petrography and lithological contextualisation, various state-of-the-art digital imaging techniques for the analysis of the engraved motifs (3D modelling and Reflectance Transformation Imaging), and detection of pigments on its surface (Principal Components Analysis, HSI-contrast stretch, ferric pigments index and algebraic operations between bands), as well as archaeological surveys aimed at establishing the landscape context the stela was part of. The results reveal this stela is analogous to a larger series of late prehistoric sculptures portraying personages with 'headdresses', largely concentrated in the Iberian south-west and often connected to Bronze Age settlements and burial sites. In addition, the Cañaveral de León stela is closely associated to an old pathway that has had a historical prominence in terms of long-distance mobility, connecting various regions of western Spain in a South-North direction. ; We also wish to acknowledge the professional support of the CSIC Interdisciplinary Thematic Platform Open Heritage: Research and Society (PTI-PAIS). This project was partly funded by the Andalusian Regional Government annual research grant to the Research Group ATLAS (HUM-694), of the University of Sevilla.