Urban flood risks and their impacts are expected to increase as urban development in flood prone areas continues and rain intensity increases as a result of climate change while aging drainage infrastructures limit the drainage capacity in existing urban areas. Flood mitigation strategies are required as part of sound urban flood management plans to assess flood risk and identify technically feasible and cost-effective options to reduce the risk.
Central to the development of flood mitigation strategies is the efficient prediction of flood propagation characteristics in urban areas. Detailed predictions of flood flows in urban areas require the use of high resolution topographic data. However, due to computational demand topographic data is often generalised to a more manageable resolution and floodplain models are built at much coarser resolutions.
The research presented in this thesis addresses the problem of capturing small-scale features in coarse resolution urban flood models with the aim of improving flood forecasts in geometrically complex urban environments. The approach adopted in the research used a two-dimensional surface flow modelling system that can extract and incorporate useful information available in high resolution topographic data into coarse grid models. The thesis also presents modelling of the complex interaction between surcharged sewer and flows associated with urban flooding and incorporation of infiltration process in surface flow modelling tools.
Case study results showed that the incorporating volume-depth and flow-area-depth relationships extracted from high resolution topographic data significantly improved the results of coarse grid urban flood models while taking the advantage of reduced computational time to ensure efficient prediction of urban flood characteristics.
Автор: Meyer, Fernand Название: Topographical tools for filtering and segmentation 1 ISBN: 1786301571 ISBN-13(EAN): 9781786301574 Издательство: Wiley Рейтинг: Цена: 146730.00 T Наличие на складе: Нет в наличии. Описание:
Mathematical morphology has developed a powerful methodology for segmenting images, based on connected filters and watersheds. We have chosen the abstract framework of node- or edge-weighted graphs for an extensive mathematical and algorithmic description of these tools.
Volume 1 is devoted to watersheds. The topography of a graph appears by observing the evolution of a drop of water moving from node to node on a weighted graph, along flowing paths, until it reaches regional minima. The upstream nodes of a regional minimum constitute its catchment zone.
The catchment zones may be constructed independently of each other and locally, in contrast with the traditional approach where the catchment basins have to be constructed all at the same time. Catchment zones may overlap, and thus, a new segmentation paradigm is proposed in which catchment zones cover each other according to a priority order. The resulting partition may then be corrected, by local and parallel treatments, in order to achieve the desired precision.
Автор: Meyer, Fernand Название: Topographical Tools for Filtering and Segmentation 2 ISBN: 1786304074 ISBN-13(EAN): 9781786304070 Издательство: Wiley Рейтинг: Цена: 146730.00 T Наличие на складе: Нет в наличии. Описание:
Mathematical morphology has developed a powerful methodology for segmenting images, based on connected filters and watersheds. We have chosen the abstract framework of node- or edge-weighted graphs for an extensive mathematical and algorithmic description of these tools.
Volume 2 proposes two physical models for describing valid flooding on a node- or edge-weighted graph, and establishes how to pass from one to another. Many new flooding algorithms are derived, allowing parallel and local flooding of graphs.
Watersheds and flooding are then combined for solving real problems. Their ability to model a real hydrographic basin represented by its digital elevation model constitutes a good validity check of the underlying physical models.
The last part of Volume 2 explains why so many different watershed partitions exist for the same graph. Marker-based segmentation is the method of choice for curbing this proliferation. This book proposes new algorithms combining the advantages of the previous methods which treated node- and edge-weighted graphs differently.
Автор: Watson, Debbie (school For Policy Studies, University Of Bristol) Emery, Carl (resolutions First) Bayliss, Phillip (graduate School Of Education, Univ Название: Voyage of captain don felipe gonzalez in the ship of the line san lorenzo, with the frigate santa rosalia in company, to easter island in 1770-1 ISBN: 8853011254 ISBN-13(EAN): 9788853011251 Издательство: Неизвестно Рейтинг: Цена: 5200.00 T Наличие на складе: Нет в наличии. Описание: It is generally accepted that we must advance towards a sustainable society to survive. By challenging conventional wisdom about the ecological crisis and reframing the traditional values of Green Politics, Real Green: Sustainability after the End of Nature offers new answers to the key questions of whether this is really the case, what such a society will look like, and how it is to be achieved.
Автор: Nettesheim Daniel D. Название: Topographical Intelligence and the American Civil War ISBN: 1249427738 ISBN-13(EAN): 9781249427735 Издательство: Неизвестно Рейтинг: Цена: 71050.00 T Наличие на складе: Есть у поставщика Поставка под заказ.
Автор: Hannett John Название: The Forest of Arden: its Towns, Villages and Hamlets: A Topographical and Historical Account of the district and around Henley-in-Arden and ISBN: 3348041171 ISBN-13(EAN): 9783348041171 Издательство: Неизвестно Рейтинг: Цена: 42410.00 T Наличие на складе: Есть у поставщика Поставка под заказ. Описание: The Forest of Arden - its Towns, Villages and Hamlets: A Topographical and Historical Account of the district and around Henley-in-Arden and Hampton-in-Arden in the County of Warwick is an unchanged, high-quality reprint of the original edition of 1863. Hansebooks is editor of the literature on different topic areas such as research and science, travel and expeditions, cooking and nutrition, medicine, and other genres. As a publisher we focus on the preservation of historical literature. Many works of historical writers and scientists are available today as antiques only. Hansebooks newly publishes these books and contributes to the preservation of literature which has become rare and historical knowledge for the future.
