Phase 2 (Semester 2) Design of a bluegreen space for urban water management and public recreation Your client commissioned a detailed design proposal for a rewilding strategy to re-establishing wetlands

on marginal agricultural land south of the Gosforth Park Nature Reserve. The wetlands will extend the bluegreen corridor of public parks from the river Ouseburn towards Gosforth Park Nature Reserve (Figure 1) to provide high quality greenspace for recreation, biodiversity, water cleansing and flood risk attenuation. Your design proposal should include hydrological runoff predictions, the earthworks for new stormwater retention ponds to retain and clean surface water runoff from urban areas in Killingworth-Forest Hall-Longbenton, a green travel plan for wetland visitors living within a 2 mile radius of the site, a bridge over Salters Ln to improve connectivity with neighbouring communities in Longbenton, and a continuous water quality monitoring setup that records the anticipated stormwater treatment benefits of the wetlands for the river Ouseburn. North R th Road Wideopen change North Gosforth B1318 Weetslade Country Park Sandy Lane Gosforth Park Nature Reserve 1777 B1319 South Gosforth7 Salters A1056 A189 A188 Figure 1: Case study area (OpenStreetMap) Phase 2 Tasks: Benton Lane GE Benton Park Road Burradon Camperdown ALATE Killingworth Interchange Camperdown 86 m Killingworth Station Road Forest Hall worth Way Killingworth Interchange Killingworth Village Benton 2 LARG A191 40 Station Roal Whitley Road Ba Ris You should work as a team to Water/geotechnical/environmental engineering • Urban hydrology: Predict combined sewer and surface water drainage flows at the outlet of the Killingworth-Forest Hall-Longbenton sub-catchment for rainfall events of variable intensity and duration, in line with historic rainfall data (provided on Canvas). Produce a histogram of anticipated discharge volumes per rainfall event. Discuss how frequently the predicted combined sewer flow would likely exceed the minimum retained continuation flow in the sewer. Discuss what impact the installation of rainwater harvesting systems for big commercial buildings in the catchment would have on the discharges in the combined and separated sewers. Assess the effect of climate change on the catchment hydrology. Design criteria: Historic rainfall data (provided on Canvas). The Killingworth-Longbenton sub- catchment area = 12 km² with a population of 24,000 people; area from a business park and some houses with separated sewers that drains into the letch = 1.0 km2, combined sewer area = 5.0 km². Approximately half of the built-up area is gardens/greenspace and half is hard surfaced. For the definition of rainfall events, consider a minimum interevent time of 24 hours with no more than 1 mm precipitation. The minimum retained continuation flow at the Salters Ln CSO is 636 litres per second. • Earthworks: Design swales leading to one or more stormwater retention ponds on the agricultural land on the flood plain between the Gosforth Nature Reserve and Golf Club to retain and treat the surface water drainage from the Killingworth-Forest Hall-Longbenton catchment which is currently discharged directly into the Ouseburn at Salters Ln allotments. Draw annotated profiles of these swales and ponds in line with, and perpendicular to the water flow direction. Develop a plan for the related site investigation and earthworks that minimizes the amount of soil being moved on/off the site. Design criteria: Your design of the swales and pond should be informed by the Ciria SuDS manual (provided on Canvas). Environmental: Predict the anticipated water quality benefits of routing surface water drainage from the Killingworth-Longbenton sub-catchment through the stormwater retention ponds, versus the current, direct discharge of urban surface water runoff into the Ouseburn. For validation, design monitoring stations to continuously record water quality at the inlet and outlet of the stormwater retention ponds. Your predictions and monitoring should consider a range of relevant water quality metrics that can be continuously measured with sensors. Develop a sketch of the proposed installations that details the various sensors, and the installations needed for anchoring these sensors below water in the pond inlet/outlet, the provision of off-grid power and the transmission of the monitoring data. Design criteria: Use the experimental data which you have collected in CEG2102 for the stormwater retention ponds at Great Park and literature data to assess the water quality benefits of these ponds in terms of reducing the load of phosphorus, nitrogen, and faecal coliform bacteria discharged into the Ouseburn. Transport/structural/geospatial engineering • Mobility plan: Develop a Travel/Mobility Plan for visitors to the rewilded bluegreen space between the Gosforth Nature Reserve and Golf Club. This plan should consider the diverse needs of communities living within a 5-mile radius of the site and various modes to be used to access the site, any physical infrastructure required on site, and a strategy to encourage greener, cleaner, and healthier travel choices for visits to the site. You should include relevant targets for the plan to achieve, describe the key components of the plan to deliver those targets, details of how you will implement the plan, and proposals for how you will raise awareness and market the plan. You should also develop a proposal for mobility across the site that maximizes connectivity with existing and newly built travel infrastructure and public access to the educational and health benefits of the bluegreen space. Design criteria: Your travel/mobility plan should enable all community members living within a 5- mile radius to gain access to greenspace with a journey time of less than 30 min and at a cost of less than the hourly minimum wage for the return trip of two visitors. • Footbridge design: Design a pedestrian footbridge across Salter Ln to connect Heathery Lane with the footpath/cycling way between the Quorum Business Park and Longbenton. This should include details of the location, bridge deck width, bridge span and the relevant loadings. You should include a preliminary design to show the structural form and preliminary sizes, material selection and construction sequences. Details of two other possible solutions should be presented with a brief discussion justifying your preferred design on sustainability considerations (including economics) and the form and aesthetics fit with the overall Ouse Burn Way idea of connecting citizens with nature. Design criteria: You should consider the self-weight of the bridge and a pedestrian load of 4kPA as a minimum. Phase 2 deliverables: Your team should produce an exhibition to illustrate your design to external stakeholders. Your exhibition should include the following elements: Poster: A poster, A1 format, portrait orientation, illustrating your master plan for the site and key design elements. The emphasis should be on capturing the key ideas behind your design solution with emphasis on the integration of various design components into a wholistic systems design. Digital exhibit: A powerpoint slide show that can be played in rotation on a screen to illustrate the details of your design. This slide show should consist of 22 slides, 1 title slide, four slides per design component (Hydrology/Earthworks/Mobility/Structures/Environmental, 20 slides in total) that include an illustration, numerical details, and discussion of your design solution, plus 1 slide with the key references that underpin your design. You do not need to audio record a commentary for your slides, since you will be present in person at the exhibition to explain your designs. Team structure and meetings: The team structure and roles remain the same as for semester 1. The design tasks lends itself to the formation of two task groups, one for the water/geotechnical/environmental engineering design aspects and another one for the transport/structural/geospatial design aspects. Keep notes from all your team meetings, incl. the record of attendance.