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Water GCV Green Network Partnership 17 September 2013 Seven Lochs Wetland Park Scoping Report Prepared by: ............................................................. Checked by: ........................................................................ Adam Chapman Cathryn Spence Glen Middleton Graduate Engineer Principal Modeller Principal Engineer Approved by: ............................................................. Peter Robinson Regional Director Seven Lochs Wetland Park Scoping Report Rev No Comments Checked by Approved by Date 0 Preliminary draft issued to client for data on peat restoration GM PR 26 June 2013 1 Final Report following GCV-GNP comments GM PR 12 July 2013 2 Final Report following GCV-GNP comments GM PR 17 September 2013 Telephone: Website: http://www.aecom.com Job No 60289449 Reference Date Created 17 September 2013 This document has been prepared by AECOM Limited for the sole use of our client (the “Client”) and in accordance with generally accepted consultancy principles, the budget for fees and the terms of reference agreed between AECOM Limited and the Client. Any information provided by third parties and referred to herein has not been checked or verified by AECOM Limited, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of AECOM Limited. Table of Contents Executive Summary ........................................................................................................................................................................ 5 1 Study site ........................................................................................................................................................................... 6 2 Types of Opportunities and Options ............................................................................................................................... 9 2.1 Removal of structures from the channel ................................................................................................................. 9 2.2 Re-profiling and naturalising the channel ............................................................................................................. 10 2.3 Naturalising loch edges and islands ..................................................................................................................... 13 2.4 Reducing capacity of land drains to encourage localised storage in low lying marshy areas; .............................. 14 2.5 Peatland / raised bog restoration .......................................................................................................................... 15 2.6 Integrated green infrastructure and surface water management in new development. ........................................ 17 3 Data used for the analysis .............................................................................................................................................. 19 3.1 Previous studies and reference documents .......................................................................................................... 19 3.2 Tools and data-sets .............................................................................................................................................. 19 4 Analysis ........................................................................................................................................................................... 20 5 Molendinar Burn .............................................................................................................................................................. 25 5.1 Overview .............................................................................................................................................................. 25 5.2 Frankfield Loch and Stepps .................................................................................................................................. 27 5.3 Opportunity 2 – Daylighting Molendinar Burn and remove Pumping Station ........................................................ 29 5.4 Opportunity to increase connectivity between Stepps and Frankfield Loch .......................................................... 31 5.5 Channel naturalisation at Stepps (Opportunity 4) ................................................................................................. 32 5.6 Frankfield Loch margins (Opportunity 3) .............................................................................................................. 34 6 Drumpellier Country Park and Lochend Loch .............................................................................................................. 35 6.1 Drumpellier Country Park (South of Lochend Loch) - Raised bog restoration (Opportunity 10) ......................... 37 6.2 Lochend Loch – Naturalisation of banks and restoration of islands for habitat (Opportunity 12) .......................... 39 7 Bothlin Burn – Wetland Core ......................................................................................................................................... 42 7.1 Gartloch Pools and Upper Bothlin Burn Channel naturalization and Habitat Creation (Opportunity 21) ............... 45 7.2 Bothlin Burn downstream of Gartloch Road (Opportunity 23) ............................................................................... 47 7.3 Bothlin Burn, downstream of Bishop Loch (Opportunity 25) ................................................................................. 51 7.4 Garnkirk Moss SINC (Opportunity 35) .................................................................................................................. 53 7.5 Commonhead Moss – peatland restoration (Opportunity 16) ............................................................................... 56 7.6 Cardowan Moss – peatland restoration (Opportunity 20) ..................................................................................... 58 7.7 Craigend Moss - Peatland restoration (Opportunity 26) ....................................................................................... 61 7.8 Daylighting Bothlin Burn Culvert (Opportunity 29) ................................................................................................ 63 7.9 Culvert under B806 near Gartcosh (Opportunity 34) ............................................................................................ 65 8 Glenboig and Garnqueen Burn ...................................................................................................................................... 67 8.1 Garnqueen Burn (Opportunity 31 and 32) ............................................................................................................ 69 8.2 Channel & Culvert from Garnqueen Loch (Opportunity 36) .................................................................................. 71 9 Prioritised List ................................................................................................................................................................. 72 9.1 Next Steps ............................................................................................................................................................ 73 References .................................................................................................................................................................................... 74 Appendix A .................................................................................................................................................................................... 75 List of Figures Figure 1: Site Characteristics ........................................................................................................................................................ 7 Figure 2: Seven Lochs Wetland Park Study Area ........................................................................................................................ 8 Figure 3: Location of Long-list of Opportunities ....................................................................................................................... 22 Figure 4: Map of Molendinar Burn system ................................................................................................................................. 25 Figure 5: Map of Environmental Designations ........................................................................................................................... 26 Figure 6: Map of Ground Levels within the Molendinar Burn system ...................................................................................... 27 Figure 7: Ground levels and key features through Frankfield and Stepps .............................................................................. 28 Figure 8: Diversion ditch to Garnkirk Burn ................................................................................................................................ 28 Figure 9: Culvert beneath Loch Road ......................................................................................................................................... 28 Figure 10: Location of Molendinar Pumping Station ................................................................................................................. 29 Figure 11: Molendinar Pumping Station ....................................................................................................................................