Settlement specific action plan

About the Settlement/ village

Village name Appleshaw District Catchment(s) Test and Itchen Borough Ward name Penton Council Bellinger No. Residential properties: 1923 No. other 1310 Critical 43 (By ward) buildings (by Infrastructure ward) (Ward) Estimate by settlement 202 By settlement 123

About the Local Groundwater Flood Risk Areas at risk of groundwater flooding in have been given a risk ranking based primarily on the number of properties which were reported to have flooded during 2000/01. This includes internal groundfloor flooding and basement flooding, and external flooding by sewage. Other factors, including potential flooding to roads and critical infrastructure and actions taken since 2000/01 to reduce flood risk have also been taken into consideration. The ten areas with the highest rank have been assigned a ‘high’ groundwater flood risk and have had village specific action plans developed. Appleshaw has been ranked as number 7. Overall local flood risk for groundwater High

Other local flood risk assessment Ranking of ward by local flood risk 3 out of 248 EA surface water Moderate and the measures identified to manage the risk (LFRMS)

Flood risk to property from rivers and sea (based on Environment Agency flood maps) Identified community Appleshaw Communities at risk ranking (EA database) 61 Number of properties at significant or moderate flood risk 15

Summary

Flood incidents recorded Appleshaw has been affected by flooding to a broadly similar extent as experienced in 2000/2001 on several occasions in the last century. Two normally dry valleys meet at Appleshaw. In the winter of 2000-01, saturated conditions in the surrounding Chalk aquifer and continuing episodes of heavy rainfall caused high surface flows. It should be noted that the majority of the surface flow was attributed to the emergence of springs at Biddesden. In combination with high groundwater levels within the village, high surface flows through Appleshaw caused the drainage systems to become overwhelmed.

Type of flooding: Ground floor flooding, cellar flooding. Severe road flooding

Eleven properties suffered from groundwater flooding in 2000/01 (excluding external); this includes 2 properties with ground floor flooding and 9 with cellar flooding.

Settlement characteristics Residential area with surrounding countryside, woodland and agriculture. Railway line to the east.

Critical infrastructure within the ward includes: 29 x Electricity Substation 10 x Pumping stations 1 x Police staton 3 x Schools NO FIRE AND RESCUE. NO AMBULANCE. NO AIRPORT

Stream leading to the River Anton runs along the western side Appleshaw before joing the River Anton at Penton Mewsey.

Landscape, biodiversity and cultural heritage features and designations within 2km: Cultural heritage features:  Roman buildings on Lambourne's Hill (Scheduled Monument)  Roman villa 500yds (460m) south-west of House (Scheduled Monument)  Long Barrow 350m south-east of Nutbane (Scheduled Monument)  38 listed buildings in Appleshaw (http://www.britishlistedbuildings.co.uk/england/hampshire/appleshaw)  Biddesden House (Registered Park and Garden) Other environmental:  Rivers Test and Itchen (Catchment Sensitive Farming Capital Grant Scheme Target Area and Catchment Sensitive Farming Delivery Initiative 2011-2014)  Groundwater and Eutrophic Nitrate Vulnerable Zones

Future risk Detail of future risk, plus objective assessment of climate change on risk Most climate change models indicate that we are likely to experience drier summers, albeit with more intense rainafll when it occurs, and wetter winters. There is a view that groundwater recharge may decline by 5-15%. However, as groundwater flooding occurs primarily as a response to extended periods of rain during late autumn and early winter, there may be an increased risk of groundwater flooding. This is far from certain and the buffering effect of increased groundwater storage (due to lower overall recharge) may mitigate any such effect.

Note on areas of development: Specific policies should be considered by the Planning Authority to control development within this risk area. This should involve suitable property resilience levels until such time as the source, pathways and receptors are understood at a detailed enough scale to ensure that any new development is not at risk of flooding.

Infiltration drainage should be avoided unless it can be clearly demonstrated it will not have a local impact through increased groundwater rise. Septic tanks should also be avoided unless it can be demonstrated that they can operate successfully during periods of extreme groundwater level.

Measures delivered to reduce risk since 2000/2001

What has happened? Action By Whom When Constraints Improvements to the Environment Environment Agency Following a minor flooding event in Although groundwater Agency Flood Warning Service- (SEE BELOW) spring 2007 the groundwater flooding flooding cannot be Telemetry borehole installed at procedures for Solent and accurately predicted, Clanville Gate were updated with new telemetry notice of high levels can trigger levels for the new purpose drilled be provided in sufficient boreholes and refined procedures for time to avoid some some sites. damage.

Appleshaw Foul Flooding Southern Water Created in 2002 Emergency Plan  Includes trigger levels/Alerts and actions to implement in an emergency Develop a Village Flood Plan Appleshaw PC, 2002 Fyfield and PC Creation of Flood Action Group Appleshaw PC, 2002 Fyfield and Redenham PC Southern Water to provide Test Southern Water unknown Whilst Southern Water Valley Borough Council with details Test Valley Borough owns and maintains the of the leaking private sewer Council public foul sewerage laterals. Test Valley to develop and Individual property system, any work to co-ordinates an action plan for owners required to the laterals is residents affected to carry out the responsibility of the the necessary repairs property owner

Environment Agency Flood Alert Area: “Groundwater flooding in villages to the north east of Andover”

Floodline details: 0845 988 1188, select option 1 and enter Quickdial number 0122622 to get more information

For further information regarding the FAG or the flood action plan:  Appleshaw Parish council website: http://www.appleshaw.org.uk/Pages/parish-council/Parish_main.html

Identified Mitigation Mitigation proposed includes: Mitigation By Whom Review the maintenance and provision of the surface water drainage system and establish HCC, Test Valley Borough proactive maintenance schedule and flood incident reaction plan (see further below) Council, Appleshaw PC and riparian owners Review the need to install a pumping system to reduce groundwater cellar flooding in individual properties Individual property owners Sign up to Parish Lengthsman initiative 2014-15 Appleshaw PC Appleshaw PC Test Valley Information gathering Borough Council

Is there residual risk that needs to be managed? Further residual risk will be reviewed following consultation with and comments from local residents.

Future measures needed to reduce risk

Measure By Whom PHYSICAL ACTIONS Scope out and where viable Increase capacity of the surface water ditches, and the size of the HCC, Test Valley Borough culverts opposite Hammers and at the junction of Barncroft/ Appleshaw Road. Council, MAINTENANCE ACTIONS Routine (inspection) – annual (late autumn) inspection of surface water channels/ drainage Riparian owners prompted pathways culverts etc. to check for blockage and clear as necessary by Appleshaw PC Establish and foprmalise proactive maintenance response schedule in response to high groundwater levels, to include: Agree with EA suitable trigger levels for action based on Clanvillle Gate levels (note existing trigger HCC/ Environment Agency/ levels prompt various flood alert actions already). Test Valley BC/ Riparian Check and clear as required: owners Road drainage gullies; road drainage culverts; all aother surface water channels and drainage pathways including field drains. AWARENESS RAISING and INFORMATION GATHERING Ensure that residents are aware of the risk of flooding and are registered with the Environment Environment Agency/ Agency flood alert service Appleshaw PC Ensure that residents are made aware of advice on how to protect themselves and their property in Appleshaw PC times of flooding Appleshaw PC Encourage individuals to create a bespoke flood action plan. Keep accurate records of flood events as they occur Appleshaw PC , HCC