Improved probabilistic mapping and modelling of groundwater flooding in urban areas

一个由洪水风险模拟公司Ambiental和英国地质调查局组成的联盟正着手进行一项可行性研究，旨在证明一种新的模拟技术能更好地代表洪水事件中地下水的作用。当地下水位超过地表时，洪水就会发生，但高水位也会加剧暴雨引发的洪水。洪水也可能发生在防洪设施后面的城市地区，那里的地下水被高水位逼着穿过土壤。这个项目的成功完成将为新的洪水建模框架铺平道路，这将使我们能够澄清这种现象所面临的风险等级（这种现象发生在西南大部分地区和2013-14年冬季的泰晤士河谷）。有很多好处，包括规划防洪时的新见解，为即将到来的洪水做准备时的更好准备，以及提高对“高易感性”地区实际风险水平的了解。

A consortium of flood risk modelling company Ambiental and the British Geological Survey are embarking on a feasibility study that seeks to prove a new modelling technique which better represents the role of groundwater during flood events. Flooding can occur when the groundwater table exceed ground surface, but a high water table can also exacerbate flooding from heavy rainfall. Flooding can also occur in urban areas behind flood defences where groundwater is forced through the soil by high river levels. Successful completion of this project will pave the way to a new flood modelling framework which will allow us to clarify the level of risk properties are facing from this phenomena (which occurred throughout much of the south-west and Thames valley flooding of winter 2013-14). There are a multitude of benefits, including new insight when planning flood defences, better preparedness when preparing for impending floods and improved knowledge about the actual level of risk in ‘high-susceptibility’ areas.