Influence of materials deposition on functioning of backwater valves

加拿大目前的情况是，由于下水道堵塞导致的地下室洪水是家庭保险索赔中最昂贵的来源。由于更强烈的风暴和不断增长的城市化，地下室洪水的问题可能会增加，这使已经很糟糕的情况更加恶化。虽然回水阀的目的是防止回流到地下室，从而减少上述地下室淹水，但在设计和维护方面，回水阀的水力性能值得认真关注。阀门的位置具有挑战性，阀门操作的“堵塞”（由于粪便、棉絮、牙线等），以及维护阀门的不良方面，都抑制了回水阀门的性能。结果是，对于许多单独的房子来说，虽然阀门可能存在，但它们要么完全不起作用，要么部分不起作用。该项目将开发流动可视化信息，允许使用计算机模型，从而使计算机模型能够调查历史上发生的洪水发生率，并评估有重要物质污染阀门的回水阀的功能。

The existing situation in Canada is such that basement flooding due to sewer backups is the most expensive source of home insurance claims. Exacerbating an already bad situation is that issues of basement flooding are likely going to increase, as a result of more intense storms and increasing urbanization. While the intent is that backwater valves are intended to prevent backflow into basements, and hence to abate the above-indicated basement flooding, the hydraulic performance of backwater valves warrants serious attention for both design and maintenance needs. The challenging location of the valves, the 'clogging' of the valve operation (as a result of faeces, cotton batting, dental floss, etc.), and the undesirable aspects of maintaining the valves, are inhibiting the performance of the backwater valves. The result is that for many individual houses, while the valves may exist, they are either totally or partially nonfunctional. This project will develop flow visualization information that will allow a computer model to be employed, thereby enabling computer models to investigate incidences of historical flooding as have been incurred and assess the functionality of backwater valves which have had significant materials fouling the valves.