66 resultados para City planning -- Spain
Resumo:
Urban mobility in Europe is always a responsibility of the municipalities which propose measures to reduce CO2 emissions in terms of mobility aimed at reducing individual private transport (car). The European Commission's Action Plan on Urban Mobility calls for an increase in the take-up of Sustainable Urban Mobility Plans in Europe. SUMPs aim to create a sustainable urban transport system. Europe has got some long term initiatives and has been using some evaluation procedures, many of them through European projects. Nevertheless, the weak point with the SUMPs in Spain, has been the lack of concern about the evaluation and the effectiveness of the measures implemented in a SUMP. For this reason, it is difficult to know exactly whether or not the SUMPs have positively influenced in the modal split of the cities, and its contribution to reduce CO2 levels. The case of the City of Burgos is a very illustrative example as it developed a CiViTAS project during the years 2005-2009, with a total investment of 6M?. The results have been considered as ?very successful? even at European level. The modal split has changed considerably for better, The cost-effectiveness ratio of the SUMP in the city can be measured with the CO2 ton saved, specifically 36 ? per CO2 ton saved, which is fully satisfactory and in line with calculations from other European researchers. Additionally, the authors propose a single formula to measure the effectiveness of the activities developed under the umbrella of a SUMP.
Resumo:
This study aims to assess the performance or multi-layer canopy parameterizations implemented in the mesoscale WRF model in order to understand their potential contribution to improve the description of energy fluxes and wind fields in the Madrid city. It was found that the Building Energy Model (BEP+BEM) parameterization yielded better results than the bulk standard scheme implemented in the Noah LSM, but very close to those of the Building Energy Parameterization (BEP). The later was deemed as the best option since data requirements and CPU time were smaller. Two annual runs were made to feed the CMAQ chemical-transport model to assess the impact of this feature in routinely air quality modelling activities.
Resumo:
In 2015, it will be thirty years since Spanish Historic Heritage Law from 1985 was approved. The results after three decades under this law are necessarily positive and witness how the complex autonomous regional legislation has been promoted, guided and organized in this Heritage field. In addition, the law enforcement has brought into the scene how the numerous public and private initiatives involved in caring, managing, protecting and restoring our cultural heritage have been channeled and regulated, as well as monitoring the impact these initiatives produce on urban archaeology. During this long period of Spanish recent history, cultural heritage -understood as an important development tool, especially when related to cultural tourism- has succeeded in channeling resources for developing the historical research projects, both documental and archaeological, that the Spanish monumental urban ensembles were requiring. In this context, the case of the city of Madrid is a clear example of the significant development that urban Historical Archaeology has experienced in Spain over the last thirty years, especially when dealing with the study of the Middle Ages (8th to 15th centuries) and the Modern Age (16th to 18th centuries). Given the number of interventions and the important results obtained by many of them, Madrid urban archaeology is an extraordinary example of the consequences of implementing new management models, changing criteria and operating procedures, and also, of course, of the conflicts and debates raised regarding heritage, as well as the importance these interventions have implied, which is the main aim of this work.
Viability of the biochar production from different manure wastes in the Amblés Valley (Ávila, Spain)
Resumo:
In the last years, intensive animal husbandry production has led to a large concentration of animals in small areas. This has resulted in the production of excessive amounts of manures with insufficient nearby land for application. One of this areas is the Amblés Valley located in the centre of Spain, near to Ávila city, with an extension of 167472 ha of which 88.9% is agricultural land. This valley has an important livestock focused on pig, cattle, chicken production which is associated with the generation of more than 200,000 t/year of manure. There are a number of environmental problems associated with these intensive agricultural systems, including N and P pollution of water bodies, methane emissions and odour pollution. These serious environmental threats are called for innovative environmental management approaches. A feasible technology for the management of manures, offering a potential to valorise these wastes, is pyrolysis, which results in the production of biochar. The objective of this work is evaluated the technical and economic feasibility of the production of biochar in Amblés Valley (Spain).
Resumo:
En un contexto de rápido crecimiento de la población urbana y de cambio climático global, la consecución de un modelo de desarrollo sostenible pasa inevitablemente por construir ciudades más sostenibles. Basado en una intensiva impermeabilización de los suelos, el modelo actual de desarrollo urbano modifica profundamente el ciclo natural del agua en las ciudades. La drástica reducción de la capacidad de infiltración del terreno hace que gran parte de la precipitación se transforme en escorrentía superficial, que se concentra rápidamente originando grandes caudales punta. Además, el lavado de las superficies urbanas aporta altas cargas de contaminación a la escorrentía que producen importantes impactos en los medios receptores. Esta realidad motiva la realización de la presente tesis doctoral cuyo objetivo general es contribuir a la consecución de ciudades sostenibles a través de la gestión integral de las aguas de lluvia en los entornos urbanos. Con el objetivo prioritario de minimizar los riesgos de inundación, el enfoque convencional del drenaje urbano desarrolló las primeras soluciones en relación a los caudales punta, centralizando su gestión en el sistema de saneamiento e incorporando la escorrentía al mismo tan rápido como fuera posible. Pero en episodios de lluvias intensas la sobrecarga tanto hidráulica como de contaminación del sistema provoca un incremento de la vulnerabilidad de la población a las inundaciones, una falta de garantía de salud pública y graves impactos sobre los medios receptores. La aprobación en 1987 del CleanWaterAct en Estados Unidos, en el que se reconoció por primera vez el problema de la contaminación aportada por la escorrentía urbana, fue el punto de partida de un nuevo enfoque que promueve un conjunto de técnicas de drenaje que integran aspectos como cantidad de agua, calidad de agua y servicio a la sociedad. Estas técnicas, conocidas como Sistemas de Drenaje Sostenible (SUDS), son consideradas como las técnicas más apropiadas para gestionar los riesgos resultantes de la escorrentía urbana así como para contribuir a la mejora medioambiental de la cuenca y de los ecosistemas receptores. La experiencia internacional apunta a que la efectiva incorporación de los SUDS como sistemas habituales en el desarrollo urbano debe basarse en tres elementos clave: El desarrollo de un marco normativo, la aplicación de instrumentos económicos y la participación ciudadana activa en el proceso. Además se identifica como una de las líneas estratégicas para avanzar en la resolución de la problemática el desarrollo y aplicación de metodologías que apoyen el proceso de toma de decisiones basadas en indicadores cuantificables. Convergiendo con esta línea estratégica la presente tesis doctoral define unos indicadores de sostenibilidad focalizados en una temática no desarrollada hasta el momento, la gestión integral de las aguas de lluvia. Para ello, se aplica el marco analítico Presión-Estado–Respuesta bajo un enfoque que rebasa el sistema de saneamiento, enmarcando la gestión de las aguas de lluvia en las múltiples y complejas interrelaciones del sistema urbano. Así se determinan indicadores de presión, de estado y de respuesta para cada elemento del sistema urbano (Medio Receptor – Cuenca Urbana – Sistema de Saneamiento), definiendo para cada indicador el objetivo específico, la unidad de medición, la tendencia deseada de evolución y la periodicidad de seguimiento recomendada. La validez de la metodología propuesta se comprueba en el estudio de caso de la ciudad de Zaragoza. La determinación de los indicadores permite realizar un diagnóstico y definir unas líneas estratégicas de actuación que contemplan mejoras no sólo en el sistema de saneamiento y drenaje urbano, sino también en el marco normativo, urbanístico, económico, social y ambiental. Finalmente, se concluye que la integración de la gestión de las aguas de lluvia en las políticas de ordenación del territorio, el desarrollo de mecanismos de coordinación institucional, la mejora del marco normativo y la aplicación de instrumentos económicos son elementos clave para la gestión integral de las aguas de lluvia y el consecuente desarrollo de ciudades más sostenibles en España. In a context of rapid urbanization and global climate change, coping with sustainable development challenges requires the development of sustainable cities. Based on an intensive soil permeability reduction, the current development model deeply modifies the natural water cycle in the urban environment. Reduction of soil infiltration capacity turns most of the rainwater into surface runoff, rapidly leading to heavy peak flows which are highly contaminated due to the flushing of the urban surface. This is the central motivation for this thesis, which aspires to contribute to the attainment of more sustainable cities through an integrated management of rainwater in urban environments. With the main objective of minimizing floods, the conventional approach of drainage systems focused on peak flows, centralizing their management on the sewage system and incorporating flows as fast as possible. But during heavy rains the hydraulic and contamination overcharge of the sewage system leads to an increase in the vulnerability of the population, in regards to floods and lack of public health, as well as to severe impacts in receiving waters. In 1987, the United States’Clean Water Act Declaration, which firstly recognized the problem of runoff contamination, was the starting point of a new approach that promotes a set of techniques known as Sustainable Drainage Systems (SUDS)that integrates issues such as quantity of water, quality of water and service to society. SUDS are considered the most suitable set of techniques to manage the risks resulting from urban runoff, as well as to contribute to the environmental enhancement of urban basins and of the aquatic ecosystems. International experience points out that the effective adoption of SUDS as usual systems in urban development must be based on three key elements: The enhancement of the legal frame, the application of economic tools and the active public participation throughout the process. Additionally, one of the strategic actions to advance in the resolution of the problem is the development and application of methodologies based in measurable indicators that support the decision making process. In that line, this thesis defines a set of sustainability indicators focused in integrated management of rainwater. To that end, the present document applies the analytical frame Pressure – State – Response under an approach that goes beyond the sewage system and considers the multiple and complex interrelations within urban systems. Thus, for the three basic elements that interact in the issue (Receiving Water Bodies – Urban Basin – Sewage System) a set of Pressure – State – Response indicators are proposed, and the specific aim, the measurement unit, the desired evolution trend and the regularity of monitoring are defined for each of the indicators. The application of the proposed indicators to the case study of the city of Zaragoza acknowledged their suitability for the definition of lines of action that encompass not only the enhancement of the performance of sewage and drainage systems during rain events, but also the legal, urban, economic, social and environmental framework. Finally, this thesis concludes that the inclusion of urban rainwater management issues in the definition of regional planning policies, the development of mechanisms to attain an effective institutional coordination, the enhancement of the legal framework and the application of economic tools are key elements in order to achieve an integrated rainwater management and the subsequent sustainability of urban development in Spain.
Resumo:
La lectura histórica del territorio en relación con el sistema agroalimentario aporta elementos claves para reconstruir el sistema territorial, aprovechando la oportunidad que ofrece un renovado interés por la alimentación local y sostenible. El análisis histórico transdisciplinar incorpora variables espaciales, económicas, energéticas, urbanísticas, agronómicas y nutricionales y se centra en el tramo medio del valle del Duero (Castilla y León, España). Se trata de un territorio tradicionalmente agrícola, donde un producto de la tierra -el vino- es motor de innovación y ha transformado paisajes y estructuras. Aún así, se enfrenta a un desarrollo desigual e ilustra las contradicciones del mundo rural en un contexto alimentario globalizado. El análisis de la región desde 1900 permite constatar la relación entre la organización del territorio, el sistema agroalimentario, y cada una de las etapas nutricionales: a) la superación de la desnutrición está asociada a una agricultura familiar y al territorio de proximidad, que persiste en la zona hasta 1950; b) el modelo de consumo de masas y sobrealimentación, se basa en una agricultura industrializada y un territorio polarizado ligado al desarrollismo, que se extiende hasta 1985; c) finalmente, el modelo de consumo segmentado se apoya en una agricultura terciarizada y un territorio de enclaves en un contexto de globalización, que dura hasta nuestros días. En la última fase aparecen nuevos modelos alternativos de reconstrucción territorial con sistemas emergentes que reconectan campo y ciudad, consumo y producción desde sistemas de alimentación sostenible. Conviven dos tendencias: una hacia la jerarquización y el productivismo tecnificado y otra hacia la multifuncionalidad y la recampesinización que se reapropia de las innovaciones técnicas. La adaptación a las condiciones locales y aprovechar los recursos endógenos son elementos clave de sostenibilidad ambiental y social. Incorporar la alimentación en la planificación urbana y territorial desde una perspectiva agroecológica reduciría la insostenibilidad del sistema alimentario. Las propuestas de ordenación han de tener en cuenta la tipología de municipios, sus interrelaciones, las características agrológicas y productivas, la relación del muncipcon los núcleos de referencia y con las poblaciones que concentran las necesidades de alimentación. Se debe considerar asimismo la disponiblidad de infraestructuras, de equipamientos y de capital humano y relacional para fijar cadena de valor local. La ordenación urbanística cuenta ya con mecanismos como la clasificación del suelo, la regulación de usos y el diseño de redes de equipamientos que inciden sobre la autonomía de los sistema de alimentación locales y permiten fomentar la biodiversidad y las variedades locales. Son mecanismos insuficientemente aprovechados. Una adecuada utilización de los instrumentos de ordenación existentes, junto con el desarrollo de otros nuevos mejorarían de forma significativa la resiliencia de los sistemas agroalimentarios locales. ABSTRACT The historical review of the relationship between territory and agrifood system provides key lessons to help rebuild the territorial fabric, seizing the opportunity offered by a renewed interest in local and sustainable food. The historical transdisciplinary analysis spans spatial, economic, energy, agronomic and nutritional variables, focuses on the middle reaches of the Douro valley (Castilla y Leon, Spain). This a traditionally agricultural region, which has managed to turn a land product – the wine– into an engine of innovation which has transformed landscapes and structures. Even so, it faces the challenges of uneven development and illustrates the contradictions of the rural world in a globalized context. After the analysis of the evolution of the region since 1900, it can be concluded that the territory has been organized over time according to three models of food system that are in turn linked to different nutritional stages: a) the nutritional stage of overcoming malnutrition is related to family agriculture and a territory of proximity, which persists in the studied area until 1950; b) the model of mass consumption and overeating, was built on an industrialized agriculture and a polarized territory with unhindered development, which runs until 1985; c) and, finally, the model of consumer segmentation associated with terciarized agriculture and enclave territories in the context of globalization, which lasts until present time. During this last stage new alternative models of small-scale territorial reconstruction appear, linked to emerging systems that, based on sustainable food systems, reconnect city and countryside, consumption and production. Actually two trends coexist: one towards hierarchisation and tech-based productivism, and another one towards multifunctionality and peasantization that reappropriates technical innovations. The adaptation to local conditions taking advantage of local resources is a key element of environmental and social sustainability. Integrating food into urban and regional planning from an agroecological perspective would help reduce the current unsustainability of the food system. Planning proposals for municipalities need to consider their typology, agrological characteristics, productive capacity, links to other municipalities, proximity to reference nodes and population concentrations with food demands that need to be met. Availability of infrastructure, facilities, as well as human and relational capital to establish and reinforce local value chains is another aspect to consider in planning proposals. Spatial and urban planning are already equipped with mechanisms, such as land classification and the design of facilities’ networks, that affect the autonomy and stability of local food systems and can support biodiversity and adoption of local varieties. We are, however, missing opportunities. An adequate use of existing planning tools and the development of new ones could significantly improve the resilience of local agrifood systems.