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首页> 外文期刊>Sustainability >Urban Floods in Lowlands—Levee Systems, Unplanned Urban Growth and River Restoration Alternative: A Case Study in Brazil
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Urban Floods in Lowlands—Levee Systems, Unplanned Urban Growth and River Restoration Alternative: A Case Study in Brazil

机译：低地的城市洪水—堤防系统，计划外的城市增长和河流修复方案：以巴西为例

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The development of cities has always had a very close relation with water. However, cities directly impact land use patterns and greatly change natural landscapes, aggravating floods. Considering this situation, this paper intends to discuss lowland occupation and city sustainability in what regards urban stormwater management, fluvial space, and river restoration, aiming at minimizing flood risks and improving natural and built environment conditions. River plains tend to be attractive places for a city to grow. From ancient times, levees have been used to protect lowland areas along major watercourses to allow their occupation. However, urban rivers demand space for temporary flood storage. From a systemic point of view, levees along extensive river reaches act as canalization works, limiting river connectivity with flood plains, rising water levels, increasing overtopping risks and transferring floods downstream. Departing from this discussion, four case studies in the Iguaçu-Sarapuí River Basin, a lowland area of Rio de Janeiro State, Brazil, are used to compose a perspective in which the central point refers to the need of respecting watershed limits and giving space to rivers. Different aspects of low-lying city planning are discussed and analyzed concerning the integration of the built and natural environments.
机译：城市的发展一直与水有着密切的关系。但是，城市直接影响着土地利用方式，极大地改变了自然景观，加剧了洪灾。考虑到这种情况，本文打算在城市雨水管理，河流空间和河流恢复等方面讨论低地占用和城市可持续性，旨在最大程度地减少洪水风险并改善自然和建筑环境条件。平原地区往往是城市发展的理想之地。从远古时代起，就开始使用堤坝保护主要水道沿线的低地地区，以允许其占领。但是，城市河流需要空间来临时存储洪水。从系统的角度来看，沿宽阔河段的堤防起到了运河化的作用，限制了河流与洪泛区的连通性，水位上升，越过危险并向下游转移了洪水。在这次讨论的基础上，以巴西里约热内卢州的低地伊瓜苏-萨拉普伊河流域为例，进行了四个案例研究，构成了一个观点，其中中心点是需要尊重流域界限并为河流。讨论并分析了低层城市规划的各个方面，涉及建筑和自然环境的整合。

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