17/02/2016 Identifying causes of failure and selecting measures operationally 1 Evidence + Measures Phase 3: Tidal Ribble Water Bodies Measures Workshop, 14 August 2012 Evidence Pack for Savick Brook and Ribble Link By Victor Aguilera, Anne-Marie Quibell, Paul Hulme, Natalie Phillips & Nick Rukin For more details contact: [email protected] [email protected] [email protected] [email protected] Prepared by P Hulme and N Rukin pjHYDRO Copyright and status 2 Copyright This document (set of slides) contains data and information licensed to Environment Agency and provided by the Environment Agency to pjHYDRO Limited and to RUKHYDRO Limited. © Environment Agency – February, 2016. All rights reserved. This document may be reproduced with prior permission of the Environment Agency. Document Status Produced by pjHYDRO Limited for Defra and released to the Environment Agency for use at the Evidence + Measures Phase 3, Measures Workshop, 14 August 2012. Working document provided for the use of stakeholders at workshop. (Hence there may be minor errors, e.g. errors in figure numbering.) Reviewed by the Environment Agency 2016. Dissemination Status Reviewed and approved for external release by Defra and the Environment Agency 2016. 1 17/02/2016 3 Savick Brook & Ribble Link . Savick Brook & Ribble Link Overview Maps & Charts . Savick Brook & Subcatchments – Top of Savick (u/s 88003570) – Eaves Brook (u/s 88003573) – Sharoe Brook u/s 88003574 – Bottom of Savick Brook (including Ribble Link) (u/s 88003575) 4 Savick Brook & Ribble Link Overview Maps and Charts 2 17/02/2016 Fig 1.1 Savick Brook & Ribble Link: Water bodies (WBs), catchments, monitoring points (MPs) & topo contours 5 OS 10 m contours Other monitoring points Sharoe Brook Savick Brook Ribble Link WFD monitoring points Eaves Brook MP 8803575 Sandy Brook Fig 1.2 Savick Brook & Ribble Link: Suspected problems identified by EA Staff 6 Dashed line marks divide between 2 WBs: Ribble Link to the west (d/s) Savick Brook WB to east (u/s) MP 8803575 3 17/02/2016 Discharges Fig 1.3 Savick Brook & Ribble Link: Pressures NIRS (Water_selected) 7 MP 8803575 Fig 1.4 Savick Brook & Ribble Link : Subcatchments (to WQ monitoring points) 8 OS 10 m contours Other monitoring points Sharoe Brook Savick Brook Ribble Link WFD monitoring points Eaves Brook MP 8803575 Sandy Brook 4 17/02/2016 Fig 1.5 Savick Brook & Ribble Link : Land Use (2000) 9 Sea/Estuary Land Use - Summary Categories 160%Saltmarsh Inland Water Upper and lower sub-catchments are less Woodland 140% urban and dominated by managed Semi Natural Arable grassland Grass 120% Eaves Brook Suburban/rural development Urban Sharoe Brook Sandy Brook 100% 10% 1% 5% 5% 3% 3% 5% 5% 80% 18% 20% 29% 37% 49% 60% 73% 61% 71% 53% 40% 37% 48% Proportion of Total Land Use in Water Body Body (%) Landin Water Use of Total Proportion 43% 31% 20% 21% 14% 13% 17% 18% 9% 7% 7% 5% 0% 1% 5% 3575-3576 3571-3575 Above Above 3570-3571 Above 3569-3570 Above Downstream 88003574 88003573 88022980 88003569 Upstream Source of Data: Environment Agency summaries from CEH data Fig 1.6 Savick Brook & Ribble Link : Urban Development in Preston Ptc Sandy Brook 1976-1991 10 Parts of Sharoe Brook 1963-1991 Parts of Eaves Brook pre 1900 Downstream of Sharoe Brook is pre-1963 but some 1976-1991 Source: Historical urban development data provided by Lancashire County Council 5 17/02/2016 Fig 1.7 Savick Brook & Ribble Link : Septic Tanks 11 Density of Septic Tanks in Savick Brook Subcatchments 25 Septic tanks throughout, although very few on Septic Tank Density Savick Brook between Sandy Brook and Eaves 20 Brook 2 15 21.3 10 South Fylde Drain19.9 Sites (2010 onwards) 14.4 14.6 Number of Septic Tanks per km Tanks Septic of Number 5 9.5 8.7 9.4 88003569 1.4 88003569 - 0 7.7 5.4 6.7 5.9 2.2 4.7 6.6 5.3 88003570 3575-3576 3571-3575 Above Above 3570-3571 Above 3569-3570 Above 88003574 88003573 88022980 88003569 88003575 - 03574 88003576 (Sharoe Brook) 88022980 (Sandy Brook) 88003573 (Eaves Brook) 88003570 - 88003571 - 88003571 88003575 Source of Data: Environment Agency raw data processed for this project Fig 1.8 Savick Brook & Ribble Link: Consented Discharges 12 Many sewage related discharges (red and amber) (some have been revoked now) Come back to how consents have changed over time soon. 88003569 88003569 - 88003570 88003575 - 03574 88003576 (Sharoe Brook) 88022980 (Sandy Brook) 88003573 (Eaves Brook) 88003570 - 88003571 - 88003571 88003575 Source of Data: Environment Agency raw data processed for this project 6 17/02/2016 Fig 1.9 Savick Brook & Ribble Link : Consented Discharges (2005-2009) 13 Consented Discharges (2005-2009) per km2 - Main Categories 3.0 Sewerage Network - Sewers - water company Sewerage Network - Pumping Station - water company Sewage Disposal Works - water company 2 2.5 Sewage disposal works - other Other Tourist/Short Stay Accommodation Mixed Farming Domestic Property (Multiple) 2.0 Domestic Property (Single) General Construction Work 1.5 1.0 Eaves Brook Sandy Brook Sharoe Brook Number of Consented Discharges per kmDischargesNumber of Consented 0.5 0.0 7.7 5.4 6.7 5.9 2.2 4.7 6.6 5.3 3575-3576 3571-3575 Above Above 3570-3571 Above 3569-3570 Above 88003574 88003573 88022980 88003569 Source of Data: Environment Agency raw data processed for this project Fig 1.10 Savick Brook & Ribble Link : General Water Quality in 1962 14 Upstream bad quality predates main Blue Very clean and clean intensification of agriculture in the 80s ? Grey Fairly clean and doubtful Red Poor and bad 88003569 Sandy Brook and Yellow Very bad upstream of Eaves 88003570 - Sandy Brook Brook fairly clean Sharoe Brook - 88003571 88022980 - Eaves Brook 88003574 88003573 88003575 88003576 Upstream of M6 “Very bad”, Lower Eaves Brook, Sharoe Brook and d/s of Sharoe Brook “Poor and bad” Source: Maps from Lancs. River Authority Reports 7 17/02/2016 Fig 1.11 Savick Brook & Ribble Link: General Water Quality in 1970 15 Class 1 Unpolluted Class 2 Doubtful Quality Class 3 Poor Quality Class 4 Grossly Polluted Sharoe Brook - Eaves Brook 88003575 Upstream of M6 and Eaves Brook “Grossly Polluted”, others are “Doubtful Quality” Source: Maps from Lancs. River Authority Reports Phosphate is generally poor Fig 1.12 Savick Brook & Ribble Link : BOD & NH4-N poor through Preston (except Sharoe Brook) WFD WQ Status (1990-1994) 16 Average WFD Water Quality Status (1990-1994) 20 Rolling Annual Average PO4 WFD Score 90%ile Tot NH4_N WFD Score 18 Sharoe Brook 90%ile BOD WFD Score 16 2 10%ile DO% WFD score 14 5 3 3 12 2 Eaves Brook 10 2 3 4 3 8 5 3 3 6 2 3 3 2 2 1 4 (High = 5, Good = 4, Moderate = 3, Poor = 2 & Bad = 1) 2Bad= = &Moderate 3,PoorGood 4, 5,= (High = = 1 1 1 5 5 2 4 4 4 3 2 Sandy Brook 0 WFD ScoreWFD ptc Ribble Ribble Link ptc Savick ptc Savick ptc Eaves ptc Savick ptc Sandy at Grimsargh Canal at Lea Brook Brook Brook Brook Brook Road Bridge Rd 88003576 88003575 88003574 88003573 88003571 88022980 88003570 88003569 Savick Brook Savick Brook Sharoe Brook Eaves Brook Savick Brook Sandy Brook Savick Brook Savick Brook Source of Data: Environment Agency raw data processed for this project 8 17/02/2016 WQ improved generally since 1990-1994 Fig 1.13 Savick Brook & Ribble Link : – see Figure 1.9 WFD WQ Status (1995-1999) 17 Average WFD Water Quality Status (1995-1999) 20 Rolling Annual Average PO4 WFD Score 90%ile Tot NH4_N WFD Score 18 90%ile BOD WFD Score 16 10%ile DO% WFD score Sharoe Brook 14 2 2 2 12 2 4 Eaves Brook 2 4 10 4 4 2 3 8 4 2 4 3 6 2 2 1 4 (High = 5, Good = 4, Moderate = 3, Poor = 2 & Bad = 1) 2Bad= = &Moderate 3,PoorGood 4, 5,= (High = = 5 5 5 5 5 5 2 Sandy Brook 0 WFD ScoreWFD ptc Ribble Ribble Link ptc Savick ptc Savick ptc Eaves ptc Savick ptc Sandy at Grimsargh Canal at Lea Brook Brook Brook Brook Brook Road Bridge Rd 88003576 88003575 88003574 88003573 88003571 88022980 88003570 88003569 Savick Brook Savick Brook Sharoe Brook Eaves Brook Savick Brook Sandy Brook Savick Brook Savick Brook Source of Data: Environment Agency raw data processed for this project WQ improved generally since 1995-1999 Fig 1.14 Savick Brook & Ribble Link : – see Figure 1.10 WFD WQ Status (2000-2005) (More recent data is limited) 18 Average WFD Water Quality Status (2000-2005) 20 Rolling Annual Average PO4 WFD Score Phosphate is generally poor, slightly 18 90%ile Tot NH4_N WFD Score better in Eaves Brook BOD & NH4-N poorest in Eaves / Sharoe 90%ile BOD WFD Score 16 10%ile DO% WFD score Eaves Brook 14 Sharoe Brook 2 2 2 2 3 12 2 4 4 4 10 4 3 3 8 4 4 4 3 3 3 6 4 (High = 5, Good = 4, Moderate = 3, Poor = 2 & Bad = 1) 2Bad= = &Moderate 3,PoorGood 4, 5,= (High = = 5 5 5 5 5 5 2 Sandy Brook 0 WFD ScoreWFD ptc Ribble Ribble Link ptc Savick ptc Savick ptc Eaves ptc Savick ptc Sandy at Grimsargh Canal at Lea Brook Brook Brook Brook Brook Road Bridge Rd 88003576 88003575 88003574 88003573 88003571 88022980 88003570 88003569 Savick Brook Savick Brook Sharoe Brook Eaves Brook Savick Brook Sandy Brook Savick Brook Savick Brook Source of Data: Environment Agency raw data processed for this project 9 17/02/2016 Fig 1.15 Savick Brook & Ribble Link : Downstream DO changes (1990 – 2005) 19 Average 10%ile Dissolved Oxygen (1990-2005) 120 Good Eaves & Sharoe Brook both have lower DO than Savick Brook 100 89.4 84.9 86.0 81.5 88.8 82.7 80 84.2 79.7 85.2 83.4 81.4 82.7 73.1 72.4 69.4 60 66.4 67.2 53.4 54.8 40 2000-2005 DO has improved since early 1995-1999 Average Oxygen (%sat) Dissolved 10%ile Average 20 1990s, but there is still a 1990-1994 Bad deterioration through Preston Open symbols are tributaries
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