The Future of Hydraulic Water Network Design to Manage Discolouration Risk

该项目将在一个试验区内进行高度监测的实地试验，以评估累积行为，目的是调查水力模型确定潜在变色风险地点的能力。总之，这将涉及：1。试验区水力模型，以确定潜在的“低流量”物质沉积风险区（这可能包括标准UU水力模型和扩展，以包括SIMDEUM模型）2。对[#1]进行彻底和详细的DMA冲洗，以验证模型结果和DMA沉降的风险。作为该详细材料表征的一部分，将进行材料表征以确定对风险区位置的影响，例如，较重的颗粒沉降在较高流量区，因此有效地进一步上游。这对不同的来源沃茨可能很重要，但目前还没有证据。可以设想，该信息还可以用于帮助通知临界沉降流速，然后通知沉降模型。3.重复DMA冲洗[#2/3]，以了解沉积物累积的风险-回报，其可驱动重复接触和维护频率（这与PODSS概念所述的粘性层开发的回报率相反）。应用“动态DMA”策略，修改流路（如打开边界阀）或定期移动阀，以最大限度地减少/防止沉积物积聚。需要进一步的冲洗试验[#4]来证明获益。调查公司范围内的实施和推广，包括业务照常可行性

The project will use highly monitored field trials within a pilot area to assess accumulation behaviour with the aim to investigate the ability of hydraulic models to determine potential discolouration risk sites. In summary this would involve:1. Pilot zone hydraulic modelling to identify potential 'low-flow' material sedimentation risk zones (this could include standard UU hydraulic models and extension to include SIMDEUM models)2. Thorough and detailed DMA flushing of [#1] to validate model findings and the risks from DMA sedimentation. As part of this detailed material characterisation will be undertaken to determine the influence on risk zone location, e.g. heavier particles settling at higher flow zones, so effectively further upstream. This is likely to be significant for different source waters, but as yet no evidence exists. It is envisioned this information may also be used to help inform critical settling flow velocities and then sedimentation models. 3. Repeat DMA flushing [#2/3] to understand the risk-return for sediment accumulations that can drive repeating-contacts and maintenance frequency (this is in contrast to return rates for cohesive layer development as described by the PODSS concepts).4. Application of 'Dynamic DMA' strategies whereby flow paths are modified (such as opening boundary valves) or periodic valve movements with the aim to minimise/prevent sediment accumulations. Further flushing trials [#4] required to evidence benefits.5. Investigate companywide implementation and rollout including business as usual viability