260 research outputs found

    Agent-based modelling and inundation prediction to enable the identification of businesses affected by flooding

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    Flooding continues to cause significant disruption to individuals, organisations and communities in many parts of the world. In terms of the impact on businesses in the United Kingdom (UK), flooding is responsible for the loss of millions of pounds to the economy. As part of a UK Engineering and Physical Sciences Research Council funded project on flood risk management, SESAME, research is being carried out with the aim of improving business response to and preparedness for flood events. To achieve this aim, one strand of the research is focused on establishing how agent-based modelling and simulation can be used to evaluate and improve business continuity. This paper reports on the development of the virtual geographic environment (VGE) component of an agent-based model and how this has been combined with inundation prediction to enable the identification of businesses affected by flooding in any urban area of the UK. The VGE has been developed to use layers from Ordnance Survey’s MasterMap, namely the Topography Layer, Integrated Transport Network Layer and Address Layer 2. Coupling the VGE with inundation prediction provides credibility in modelling flood events in any area of the UK. An initial case study is presented focusing on the Lower Don Valley region of Sheffield leading to the identification of businesses impacted by flooding based on a predicted inundation. Further work will focus on the development of agents to model and simulate businesses during and in the aftermath of flood events such that changes in their behaviours can be investigated leading to improved operational response and business continuity

    Alicante Coastal Management for Sustainable Development

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    Human intervention on the coast has been intense, due to the source of wealth that the coastal areas represent, especially in the form of tourism, which has resulted in a rapid erosion of its beaches. This paper discusses the current state of beach management in the various competent public administrations on the Costa Blanca (SE Spanish-Mediterranean), in relation to urban development and regression on the waterfront. To this end, an analysis has been carried out of the responses to a survey of those responsible for managing each of the 19 coastal municipalities of the Alicante coast, covering 244 km of coastline, 91 beaches and their personnel. Also, an investigation has been conducted as to whether this management’s aim is to protect the coastline and maintain the flora and fauna or just to manage recreation as the main economic activity is tourism. The analysis shows that the beach is simply regarded as a product or service offered to the user thereof. However, local authorities have not detected problems, possibly for two reasons: they do not have sufficient knowledge and this is understandable, given their lack of responsibilities in this area. This causes many beaches to have a high occupancy rate and there is a shift of users towards natural beaches. The study gives us information about the complex administrative process in the coastal system that often proves ineffective on this narrow strip of land

    Triomensional plasticity using BIEM

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    This paper presents the application of BIE techniques to elastoplastic three-dimensional problems. Along with the general procedures the needed integrations are described in detail and so is the flow chart of the written program

    Sustainable development city-beach in Alicante

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    [EN] Tourism development in recent decades has involved a large urban development in coastal areas, with different anthropogenic structural interventions on the coast such as the construction of commercial buildings and marinas, which has led to intense erosion and large imbalances in the last century. This situation also affects the city of Alicante, with the area between the port of Alicante and the Huertas Cape, one of the most depressed areas of the city, due to various actions carried out since the 70s, for anthropic example fillers for building marinas, jetties and broken in poor condition because they are made of sandstone, and a bad connection between the two parts of the city. In this work the creation of a new promenade that communicates both zones is proposed, creating new beaches eliminating anthro- pogenic fillings and the remains of breakwaters along the coast, the union of diverse marine area in one marina, and the insertion of an artificial reef multipurpose. With all this it is to improve the attraction of the area, and increase the mobility of the city on the coast.Aragonés, L.; García-Barba, J.; Villacampa, Y.; López, I.; Gómez Martín, ME.; Pagán, J. (2017). Sustainable development city-beach in Alicante. International Journal of Sustainable Development and Planning. 12(4):704-712. doi:10.2495/SDP-V12-N4-704-712S70471212

    Women's attitudes towards mechanisms of action of family planning methods: survey in primary health centres in Pamplona, Spain

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    Irala J de, Lopez del Burgo C, Lopez de Fez CM, Arredondo J, Mikolajczyk RT, Stanford JB. Women's attitudes towards mechanisms of action of family planning methods: survey in primary health centres in Pamplona, Spain. BMC Women's Health. 2007;7(1): 10.Background: Informed consent in family planning includes knowledge of mechanism of action. Some methods of family planning occasionally work after fertilization. Knowing about postfertilization effects may be important to some women before choosing a certain family planning method. The objective of this survey is to explore women's attitudes towards postfertilization effects of family planning methods, and beliefs and characteristics possibly associated with those attitudes. Methods: Cross-sectional survey in a sample of 755 potentially fertile women, aged 18–49, from Primary Care Health Centres in Pamplona, Spain. Participants were given a 30-item, self-administered, anonymous questionnaire about family planning methods and medical and surgical abortion. Logistic regression was used to identify variables associated with women's attitudes towards postfertilization effects. Results: The response rate was 80%. The majority of women were married, held an academic degree and had no children. Forty percent of women would not consider using a method that may work after fertilization but before implantation and 57% would not consider using one that may work after implantation. While 35.3% of the sample would stop using a method if they learned that it sometimes works after fertilization, this percentage increased to 56.3% when referring to a method that sometimes works after implantation. Women who believe that human life begins at fertilization and those who consider it is important to distinguish between natural and induced embryo loss were less likely to consider the use of a method with postfertilization effects. Conclusion: Information about potential postfertilization effects of family planning methods may influence women's acceptance and choice of a particular family planning method. Additional studies in other populations are necessary to evaluate whether these beliefs are important to those populations

    The environmental impacts of land transformation in the coastal perimeter of the Mar Menor lagoon (Spain)

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    Assigned to WIT Press all rights under copyright that may exist in and to the Work and any associated written or multimedia components or other enhancements accompanying the Work.The distinctive environment of the lagoon has long been attractive for visitors. A surge in touristic activities has taken place in the area since the early 1960s, characterised by intense urban development along the lagoon s perimeter to accommodate the growing seasonal population. This phenomenon has particularly affected La Manga, a sandy bar which is 20 km in length. La Manga acts as a barrier between the lagoon and the Mediterranean Sea, crossed by five, more or less functional channels called golas . The urbanization process has changed the water flow system between the inside and seawater through the channels. The changes have affected coastal dynamics, the longitudinal profile of the coast and the lagoon s ecosystem. The coastal lagoon is also highly threatened by other pollution variables derived from agricultural lands. The water derived from the Tajo-Segura transfer generated a profound land transformation of the adjacent agricultural areas, which changed from extensive dry crop farming to intensively irrigated crops, disturbing the lagoon dramatically. This paper analyzes both land transformations around the coastal perimeter of the Mar Menor during the last 50 years and shows the environmental impact with its consequences on the ecosystem. Although numerous biological studies have been carried out in the Mar Menor, a better understanding of the consequences of land transformation in the perimeter of the lagoon is still necessary to understand the lagoon s situation. The results of territorial management in the Mar Menor lagoon need to be addressed in order to develop successful strategies in the area to protect this valuable ecosystem and its services.García-Ayllon Veintimilla, S.; Miralles García, JL. (2014). The environmental impacts of land transformation in the coastal perimeter of the Mar Menor lagoon (Spain). International Journal of Design and Nature and Ecodynamics. 9(2):109-128. doi:10.2495/DNE-V9-N2-109-128S1091289

    Nonlinear wave transmission and pressure on the fixed truncated breakwater using NURBS numerical wave tank

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    Fully nonlinear wave interaction with a fixed breakwater is investigated in a numerical wave tank (NWT). The potential theory and high-order boundary element method are used to solve the boundary value problem. Time domain simulation by a mixed Eulerian-Lagrangian (MEL) formulation and high-order boundary integral method based on non uniform rational B-spline (NURBS) formulation is employed to solve the equations. At each time step, Laplace equation is solved in Eulerian frame and fully non-linear free-surface conditions are updated in Lagrangian manner through material node approach and fourth order Runge-Kutta time integration scheme. Incident wave is fed by specifying the normal flux of appropriate wave potential on the fixed inflow boundary. To ensure the open water condition and to reduce the reflected wave energy into the computational domain, two damping zones are provided on both ends of the numerical wave tank. The convergence and stability of the presented numerical procedure are examined and compared with the analytical solutions. Wave reflection and transmission of nonlinear waves with different steepness are investigated. Also, the calculation of wave load on the breakwater is evaluated by first and second order time derivatives of the potential
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