Surface Water Management Plan - Hampshire County Council

7.2.2. BishopstokeBishopstoke is located towards the northern boundary of Eastleigh. Land useis dominated by residential development through the centre of the parish withthe rural area of Stoke Park to the north and agricultural areas to the south.The only known flooding incident in Bishopstoke is along Fair Oak Road. Inthis area, the existing ditches and piped system were known to surchargecausing inundation to the foul sewer. Works have been carried out to theexisting drainage, removing blockages and improving the capacity of theditches. This is believed to have resolved this issue and no further works arerequired at present although it is recommended that the relavant parties arecontacted to ensure a suitable level of maintenance is carried out.In addition to this, there is an area to the south of Templecombe Road wherethe existing land drainage and ordinary watercourse is thought to be atcapacity or there are restrictions further downstream. It is recommended thatthe riparian landowners in this area are contacted and reminded of theirresponsibilities in relation to ditch and ordinary watercourse maintenance.The parish of Bishopstoke includes an area identified by the EA as the‘Shawford to Bishopstoke on the River Itchen’ flood warning area whichcovers a large area to the west of the parish. This area is the Itchen floodplain and is largely undeveloped although does have the potential to impacton the properties along the edge of the flood plain with one major highwayand a sewage works potentially at risk. This area is also highlighted as FloodZone 3. Although no works are proposed, it is recommended that residentswithin this area sign up to the Environment Agency’s flood warning servicewhich will give an indication of the likelihood of flooding. It is alsorecommended that any development within this area aims to provideadditional capacity and attenuation in excess of the greenfield run-off rates.As a minimum, greenfield rates should be provided.The Flood Map for Surface Water highlights a few areas that have thepotential for surface water flooding in future. The largest of these areasfollows the Bow Lake main river line in the north of the parish and is within anundeveloped area.The Fair Oak Road area is shown to have a potential surface water flood riskalthough there have not been any reported incidents in this area. The datasuggests that the interaction of drainage and rivers is a critical aspect of floodrisk in Bishopstoke and will need to be carefully considered in any futureworks to ensure the flood risk is kept to a minimum. It is also essential toensure that suitable maintenance is carried out on these watercourses andthe drainage systems in the higher risk areas to ensure their capacity ismaintained.14