Yoker catchment - Clyde (Clydebank to Partick) (Potentially Vulnerable Area 11/05) Local Plan District Local authority Main catchment Clyde and Loch Lomond East Dunbartonshire River Clyde Council, Glasgow City Council, West Dunbartonshire Council Summary of flooding impacts Summary of flooding impacts flooding of Summary At risk of flooding • 4,900 residential properties • 700 non-residential properties • £8.1 million Annual Average Damages (damages by flood source shown left) Summary of objectives to manage flooding Objectives have been set by SEPA and agreed with flood risk management authorities. These are the aims for managing local flood risk. The objectives have been grouped in three main ways: by reducing risk, avoiding increasing risk or accepting risk by maintaining current levels of management. Objectives Many organisations, such as Scottish Water and energy companies, actively maintain and manage their own assets including their risk from flooding. Where known, these actions are described here. Scottish Natural Heritage and Historic Environment Scotland work with site owners to manage flooding where appropriate at designated environmental and/or cultural heritage sites. These actions are not detailed further in the Flood Risk Management Strategies. Summary of actions to manage flooding The actions below have been selected to manage flood risk. Flood Natural flood New flood Community Property level Site protection protection management warning flood action protection plans scheme/works works groups scheme Actions Flood Natural flood Maintain flood Awareness Surface water Emergency protection management warning raising plan/study plans/response study study Maintain flood Strategic Flood Planning Self help Maintenance protection mapping and forecasting policies scheme modelling 89 Section 2 Clyde and Loch Lomond Local Plan District Yoker catchment – Clyde (Clydebank to Partick) (Potentially Vulnerable Area 11/05) Local Plan District Local authority Main catchment East Dunbartonshire Council, Glasgow City Clyde and Loch Lomond River Clyde Council, West Dunbartonshire Council Background This Potentially Vulnerable Area is The area has a risk of river surface located to the south east of Loch water and coastal flooding. Damages Lomond on the northern bank of the are split fairly evenly over all sources of River Clyde (shown below). flooding. The area stretches from Clydebank in There are approximately 4,900 the west and extends east to incorporate residential properties and 700 non- parts of Bearsden, Drumchapel and the residential properties at risk of flooding. north west of Glasgow City. It is The Annual Average Damages are £8.1 approximately 80km². million. River 23% Coastal 39% Surface water 38% Figure 1: Annual Average Damages by flood source © Crown copyright. SEPA licence number 100016991 (2015). All rights reserved. Summary of flooding impacts There are a number of communities at risk of flooding from river, surface water and coastal sources with impacts to properties, infrastructure and community facilities. Due to the heavily urbanised nature in the south of this area, river flooding and surface water flooding may be closely linked with a large potential for interaction. River flooding to properties is identified within the areas of Clydebank, Drumchapel and Yoker. The Yoker Burn, originating in Bearsden and flowing through Clydebank, has been culverted over much of its length. Glasgow City Council undertook a study of the Yoker Burn and the Yokermains Burn, looking at the interaction of surface water and river flooding. The study showed a large extent of flooding to properties in the area. The information from these studies has been incorporated into this assessment. Clyde and Loch Lomond Local Plan District Section 2 90 There are a number of smaller watercourses which flow into the Clyde Estuary and present a risk of river flooding. The Loch Humphrey / Duntocher Burn originates from Greenside Reservoir and flows to the west of Clydebank. The burn is intersected by a number of structures as it passes through these urban areas. Within Duntocher there are a large number of residential properties at risk of flooding. Downstream of the Duntocher Burn properties within the Mountblow area are also at risk. The Garscadden Burn and its tributaries are known to cause flooding to the residential area of Bearsden, which borders Drumchapel (Colquhoun Park/Conon Avenue). There are approximately 2,300 residential properties at risk of surface water flooding. The main transport routes, which run from east to west across the Potentially Vulnerable Area, are at risk including the A82 and A739. The areas at highest risk from surface water flooding will require the preparation of surface water management plans. Scottish Water and local authorities have completed a number of studies in the area. These have included strategic and detailed assessments of surface water risk and interaction with river flooding, with the potential for mitigation action. Many of these studies have been helped by the partnership working developed within the Metropolitan Glasgow Strategic Drainage Partnership. This has led to the implementation of schemes and works to protect properties from river and surface water flooding. The risk of flooding to people and property, as well as to community facilities, utilities, the transport network, designated sites and agricultural land is summarised in Table 1. The damages associated with floods of different likelihood are shown in Figure 2. For this Potentially Vulnerable Area the highest damages are to non-residential properties followed by damages to residential properties. Within this Potentially Vulnerable Area it is estimated that climate change will increase the number of residential properties at risk of flooding from approximately 4,900 to 6,300 and the number of non-residential properties from approximately 700 to 950. The location of the impacts of flooding is shown in Figure 3. The areas with the highest impacts are Clydebank, Drumchapel and Partick. Various roads including the A82 and railways are also at risk of flooding. History of flooding Flood records in the area predominantly relate to surface water flooding at Bearsden in East Dunbartonshire. These events have impacted roads, properties and businesses. Notable flooding occurred in Bearsden in 2005, 2006, 2007 and 2008 which resulted in disruptions to railway services and flooding of houses. Flooding also occurred in this part of Glasgow City in January 1934, which affected the railway services and suspended traffic. The Garscadden Burn and its tributaries have also caused flooding to the residential area of Bearsden, which borders Drumchapel (Colquhoun Park/Conon Ave Bearsden). Significant flooding was recorded in a narrow corridor in Glasgow City on 21 October 2013, which affected various parts of north and north west Glasgow. 91 Section 2 Clyde and Loch Lomond Local Plan District 1 in 10 1 in 200 1 in 1000 High likelihood Medium likelihood Low likelihood Residential properties (total 1,900 4,900 6,100 69,000) Non-residential properties (total 200 700 950 9,100) People 4,100 11,000 13,000 10 Includes: 20 Includes: 20 Includes: Community educational educational educational facilities buildings and buildings and buildings and healthcare facilities healthcare facilities healthcare facilities Utilities assets 20 60 70 Transport links- 4.3 (of which 1.1 is A 14.7 (of which 12.5 19.5 (of which 12.9 roads (km) road) is A road) is A road) Transport links- 1.4 6.0 7.5 rail (km) Environmental designated areas 0 0 0 (km²) Designated cultural 11 15 16 heritage sites Agricultural land 0.3 0.4 0.4 (km²) Table 1: Summary of flooding impacts1 Figure 2: Damages by flood likelihood 1 Some receptors are counted more than once if flooded from multiple sources Clyde and Loch Lomond Local Plan District Section 2 92 Figure 3: Impacts of flooding 93 Section 2 Clyde and Loch Lomond Local Plan District Objectives to manage flooding in Potentially Vulnerable Area 11/05 Objectives provide a common goal and shared ambition for managing floods. These objectives have been set by SEPA and agreed with flood risk management authorities following consultation. They were identified through an assessment of the underlying evidence of the causes and impacts of flooding. Target areas have been set to focus actions; they do not necessarily correspond to areas at risk in SEPA’s flood map. The objectives below have been set for Yoker catchment - Clyde (Clydebank to Partick) Potentially Vulnerable Area. Reduce the risk of river and surface water flooding to residential properties, non- residential properties and transport routes in Yoker Mains and Yoker Burn catchments Indicators: Target area: • 370 residential properties • 50 non-residential properties • £1.2 million Annual Average Damages • 3.0km of road Image found and displayed. Objective ID: 11016 ©Crown copyright. All rights reserved. SEPA lic.no. 100016991 (2015) Reduce the risk of flooding from the Duntocher Burn combined with surface water to residential properties, non-residential properties and community facilities Indicators: Target area: • 370 residential properties • 30 non-residential properties • £550,000 Annual Average Damages • 2 educational buildings Image found and displayed. Objective ID: 11079 ©Crown copyright. All rights reserved. SEPA lic.no. 100016991 (2015) Clyde and Loch Lomond Local Plan District Section 2 94 Target area Objective ID Indicators within PVA Glasgow Reduce the economic damages and 11007