EXPERIMENTAL INVESTIGATION OF FLOW-INTERACTIONS BETWEEN ABOVE AND BELOW GROUND DRAINAGE SYSTEMS THROUGH A MANHOLE

摘要

Climate change, the increase of urbanization and urban creep, as well as aging drainage infrastructure, will increase the frequency, magnitude and impact of pluvial flooding events in the UK and worldwide. Pluvial flood models are increasingly being used to assess flood risk, however it is difficult to accurately calibrate and validate such models due to the paucity of field data. The rate of exchange between above and below ground flows (i.e. sewer/surface flows through conduit, such as manholes and gullies) is one aspect of flood modelling, which lacks validation data. Physical models may be used to provide some of these datasets. This paper describes a unique surface/subsurface model built to provide a supporting experimental datasets in order to validate computer modelling results and experimentally quantify the interaction of flow between the below and above ground systems for a range of pluvial conditions.