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Floodplain Management in Urban Developing plain Management in Urban Developing and Land-Use Controls

机译：城市发展中的洪泛区管理城市发展与土地利用控制中的平原管理

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Some of the most critical flood problems occur in urban areas where values at risk are higher and damages tend to be heavier. Fast urban developing regions raise very specific problems because of the unsteady situation of these regions in terms of catchment land-use and urban en- croachment. A realistic approach to flood management in these situations requires the consideration of urban growth scenarios and the simulation of the corresponding flood conditions. Coastal towns are frequently located in floodplains and are subject to flood hazard. This is the case for many coastal areas in Southern Europe that are still developing fast due to migration of the population to these areas. In such cases, flood management cannot be dissociated from land-use management, and non-structural measures for flood control can play a crucial role. It is important to make an ex-post evaluation of these types of measures in areas where they have been adopted. These issues are addressed in two Portuguese catchments, representative of urban growth and related to flood problems in Portugal and other Southern European regions. The Laje catchment is used for the ex- post evaluation of nonstructural measures, and the Livramento catchment is used for the modelling of urban growth scenarios. Quantitative results and policy recommendations are presented based on these two case-studies. Floodplain management is better done with GIS, especially if it is linked to hydrologic and hydraulic modelling capabilities. The use of GIS for conducting these studies is presented in Part II of this article.
机译：一些最严重的洪水问题发生在城市地区，这些城市的风险值较高，破坏程度往往更大。快速城市发展地区提出了非常具体的问题，因为这些地区在集水区土地利用和城市入侵方面的不稳定状况。在这种情况下，一种切实可行的洪水管理方法需要考虑城市增长的情景并模拟相应的洪水状况。沿海城镇经常位于洪泛区，容易遭受洪灾危害。南欧许多沿海地区的情况就是如此，由于人口向这些地区的迁移，这些沿海地区仍在快速发展。在这种情况下，防洪管理不能与土地利用管理脱节，防洪的非结构性措施可以发挥关键作用。重要的是要对采用这些措施的地区进行事后评估。这些问题在两个葡萄牙流域得到解决，代表了城市发展，并与葡萄牙和其他南欧地区的洪灾问题有关。 Laje流域用于非结构性措施的事后评估，Livramento流域用于城市增长情景的建模。基于这两个案例研究给出了定量结果和政策建议。通过GIS可以更好地进行洪泛区管理，特别是如果将其与水文和水力建模功能链接在一起的话。本文的第二部分介绍了使用GIS进行这些研究。

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