Kilbogget Park Flood Alleviation Scheme Kilbogget Park Flood - - PowerPoint PPT Presentation

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Jun 16, 2023 367 likes •585 views

Kilbogget Park Flood Alleviation Scheme Kilbogget Park Flood Alleviation Scheme Flood Alleviation Flood Storage Public Safety Trash Screen Kilbogget Park 2 Seafield/Bayview Area - Flooding Kilbogget Park 3 Public Safety

SLIDE 1

Kilbogget Park

Flood Alleviation Scheme

SLIDE 2

Kilbogget Park Flood Alleviation Scheme

Flood Alleviation

–Flood Storage

Public Safety

–Trash Screen

2 Kilbogget Park

SLIDE 3

Seafield/Bayview Area - Flooding

Kilbogget Park 3

SLIDE 4

Public Safety

Existing Screen Temporary Sluice

Kilbogget Park 4

SLIDE 5

Public Safety

Kilbogget Park 5

SLIDE 6

Flood Alleviation - Method

ECFRAMS

– Options study in relation to flooding in Seafield/Bayview Areas & elsewhere – Use Kilbogget Park and Glenavon Park as Flood Storage Areas

Feasibility Study

– Detailed hydrological study – Detailed assessment of flow control measures – Use a structure to throttle back flow through the 1.2km culvert downstream of the park

6 Kilbogget Park

SLIDE 7

Kilbogget Park

Flood Alleviation Scheme

ECFRAM Preferred Option

SLIDE 8

Flood Storage

Slows flow into culvert and area downstream
Water backs up in Killbogget Park – natural valley
It takes longer for flows to reach Seafield/Bayview
The duration of flow increases
The peak of the flow is lowered – reducing the

risk of flooding downstream.

8 Kilbogget Park

SLIDE 9

Flooding of Park

Must not flood residential properties
Limit to storage volumes
Bypass at greater than 100year event.
In the long term project must be combined

with further storage downstream of culvert

9 Kilbogget Park

SLIDE 10

Ecological

AA screening

– No requirement for Natura Impact Statement – No significant impact

Local Ecology

– Ecological Impact Assessment – Mitigation required during construction – No significant impact to Local Ecology

Consultation

– Inland Fisheries Ireland – National Parks and Wildlife Service – DLRCC Heritage Section

10 Kilbogget Park

SLIDE 11

Engineering

Ground conditions/Topography
Public Safety
Operational/Non blocking - Brief
Maintenance

11 Kilbogget Park

SLIDE 12

Visual

Consultations with Parks
Granite Cladding & Viewing Platform
Photomontage

– Existing – With proposed structure

12 Kilbogget Park

SLIDE 13

Preferred Flow Control Structure

Concrete structure
Max 1m2 flow throttling orifice
Trash screen
Overflow screen
Intermediate structure

– Reduce flow velocities – Protect existing culvert entrance – Facilitate maintenance

13 Kilbogget Park

SLIDE 14

Photomontage View - Detailed

14 Kilbogget Park

SLIDE 15

Photomontage View - Detailed

15 Kilbogget Park

SLIDE 16

Flow Control Structure

– Insert Plan Far Field

16 Kilbogget Park

SLIDE 17

Flow Control Structure

– Insert Plan Near Field

17 Kilbogget Park

SLIDE 18

Flow Control Structure

Insert section

18 Kilbogget Park

SLIDE 19

Photomontage - Aerial View Existing Situation Extreme Flow

Flooding in Park now – 100 year event

19 Kilbogget Park

SLIDE 20

Photomontage - Aerial View Proposed Structure Extreme Flow

20 Kilbogget Park

SLIDE 21