BALLATER FLOOD PROTECTION STUDY

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Current Flood Risk

Introduction

In 2016 SEPA released revised indicative maps showing areas at risk from river, coastal and surface water flooding throughout Scotland. The mapping was undertaken to improve the understanding of flood risk, to raise public awareness of flood risk, and encourage individuals and organisations to take steps to reduce the risk to themselves and their property, where appropriate. This study has provided updated flood maps for Ballater. This updated mapping provides a better level of detail, sufficient to assist local authorities to take a more proactive approach to flood risk management, and develop avoidance, alleviation and assistance strategies through exercise of their land use planning, flood protection and emergency planning functions. These maps are located at http://map.sepa.org.uk/floodmap/map.htm.

What do these maps show?

When a river floods the severity of the flood is known as a 1 in x year flood. This terminology represents the probability of that event occurring in any year. For reference, the December 2015 event (Storm Frank) on the River Dee in Ballater is estimated to have had almost a 1 in 200 chance of occurring in any year (or 0.5% annual probability). This does not mean that the flood will occur once every 200 years; it could occur tomorrow and again next week, but on average a flood of that severity will occur once every 200 years. For example, there is a 1 in 100 (or 1%) chance of a flood exceeding the 100 year flood in any one year. A list of frequently used return periods and their respective annual probabilities is provided in the table below:

Return Period Annual Probability [AP] (%)
2 year 50
5 year 20
10 year 10
25 year 4
30 year 3.33
50 year 2
75 year 1.33
100 year 1
200 year 0.5
1000 year 0.1

What is the purpose of this website?

This website was originally set up to host the information collated as part of the Ballater Flood Protection Study and to provide you with information on scheme developments, to inform you of progress, and to allow you the opportunity to comment on our efforts through the Contact Us page.
The results of the Ballater Additional Flood Study have now been added to the website. RPS were commissioned to undertake the Additional Flood Study to identify any changes to flood risk resulting from significant morphological changes to the River Dee, and to assess the potential for minor works to manage any increased flood risk to Ballater.

Ballater Flood Protection Study

  • Project Objectives
  • Areas of Assessment
  • Flood History
  • Current Flood Risk
  • Option Appraisal
  • Supplementary Reports

Ballater Additional Flood Study

  • Ballater Additional Flood Study
  • Additional Supplementary Reports

© BALLATER FLOOD PROTECTION STUDY 2023.

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