Approaches for the estimation of daily discharges at watercourse crossings of linear infrastructure

洪水事件会对线性工程基础设施造成重大破坏，如公路、铁路或**管道，位于基础设施与水道(河流)的交叉处。因此，重要的是**量化与这些洪灾事件有关的昂贵基础设施的实际风险。这需要**在感兴趣的地点提供径流数据。由于这些线性基础设施可以跨越**数千公里，因此不可能在所有交叉口都有水文站。因此，通常要求水文学家在未经测量的交叉口做出洪水分位数估计。拟议的Engage研究项目的主要目标**是开发估计线性基础设施**未经测量的水道交叉口的日排放量的方法。将开发一些方法，并**适应BGC在北美可能遇到的各种条件(山区地形、**北欧地区的冰效应等)。主要原则是有效地将在**多个测量位置记录的径流传输到未测量的感兴趣的地点。将制定适当的程序，**划定代表与目标地点相似条件的计量站集合。然后，将使用适当的**估计技术来进行信息传递。一旦在目标地点**生成了合成的历史序列，就可以执行适当的洪水频率分析程序来**估计对应于不同重现期的洪水分位数。所开发的方法还可以**在实时的基础上用于估计感兴趣的目标位置的瞬时径流。开发的**方法将被组合在一个工具中，该工具可以在北美的任何地点轻松使用。该工具最终可以**集成到我们的合作伙伴**BGC开发的基于网络的河网工具(RNT)应用程序中，该应用程序可用于具有线性基础设施的水道的任何相交位置。

Flood events can cause significant damages to linear engineering infrastructure, such as roads, railways or**pipelines, at locations of intersection of the infrastructure with the watercourse (river). It is hence important to**quantify the actual risks associated with these flood events for costly infrastructure. This requires the**availability of streamflow data at the locations of interest. Since these linear infrastructure can span over**thousands of kilometers, it is impossible to have hydrometric stations at all locations of intersection.**Hydrologists are hence often required to produce flood quantile estimates at ungauged crossings. The main goal**of the proposed ENGAGE research project is to develop approaches for the estimation of daily discharges at**ungauged watercourse crossings of linear infrastructure. A number of approaches will be developed and**adapted to the various conditions that may be encountered by BGC in North America (mountainous terrain,**Nordic region with ice effect, etc.). The main principle is to efficiently transfer Streamflows recorded at a**number of gauged locations to the ungauged site of interest. Adequate procedures will be developed to**delineate sets of gauged stations representing conditions that are similar to the target site. Then, appropriate**estimation techniques will be used to carry out the information transfer. Once a synthetic historical series is**generated at the target site, it is possible to carry out the appropriate flood frequency analysis procedure to**estimate flood quantiles corresponding to different return periods. The developed approaches can also be used**on a real-time basis to estimate instantaneous streamflows at the target location of interest. The developed**approaches will be grouped in a tool that can be easily used at any location in North America. The tool can**eventually be integrated in the River Network Tools (RNT) web-based application developed by our partner**BGC and which can be used for any location of intersection of watercourses with linear infrastructure.