Integrated Catchment Modelling
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1 Integrated Catchment Modelling Modelling the whole water cycle in one package Ann Pugh
2 Integrated Water Planning Historically water, wastewater and stormwater modelling occurred in silos with little integration - we need to think more holistically about 3 waters modelling We need to incorporate climate change predictions Planners, engineers and modellers working together Bring 3 waters considerations into the urban design process earlier and acknowledge the importance of: Whole of Water Cycle Management Sustainable Urban Design e.g. stormwater harvesting & sewer mining Greenspace, landscaping, streetscapes and recreational value e.g. daylighting of stormwater channels etc. Modelling is a tool that supports decision making
3 Integrated Water Modelling? Rainfall & catchment hydrology Flooding -2D models & rivers, channels Stormwater harvesting Integrated Water Modelling
4 Integrated Water Modelling? Rainfall & catchment hydrology Flooding -2D models & rivers, channels Stormwater harvesting Integrated Water Modelling Water Balance Models (long time series) Potable water Supply
5 Integrated Water? Modelling? Rainfall & catchment hydrology Flooding -2D models & rivers, channels Stormwater harvesting Integrated Water Modelling Water Balance Models (long time series) Potable water Supply Climate Change
6 Integrated? Water? Modelling? Rainfall & catchment hydrology Flooding -2D models & rivers, channels Stormwater harvesting Climate Change Integrated Water Modelling Water Balance Models (long time series) Potable water Supply Water Quality > Treatment processes (WSUD) > Quantity and effect on receiving environment
7 Disciplines are Siloed Catchment Quantity Quality Receiving Water Condition Stream flow Stormwater Quantity Damage Quality Potable Water Supply Quality Quantity Levels of Service Sewage Containment Transport Quality
8 Assumptions are also Siloed The big assumptions Boundary Outcomes Climate change $, politics etc. Rainfall generated water Resource Nuisance Surface Water Groundwater Water fit for a purpose Consumption Industry Environment Used water containing pollutants Recovery Treatment Reuse
9 Metering /Billing Asset Management Example linkages GIS SCADA & Field Observations MODELLING of Water Wastewater Stormwater and Land drainage
10 Metering /Billing Asset Management Example linkages GIS SCADA & Field Observations MODELLING of Water Wastewater Stormwater and Land drainage Marine/ Receiving Waters Population Forecasting Demand End Use Studies Ground Water Land Use Catchment Yield Climate Change
11 The Melbourne example Integrated Water Management is not new What is new is having all the components and assumptions in the one dynamic model. Start with household water balance Engage experts to build sections BECA Project Manage and Peer Review Urban Water Solutions Potable Water & Sewerage Water Technology Drainage & 2D
12 Whole of Water Cycle Modelling Modelling of water, wastewater and stormwater in a single package Looking at the whole water cycle in an area Supporting integrated catchment management and sustainable design principles
13 Household water cycle Potable Water Potable for external use Potable Internal Use Runoff from roof Rainwater Tank Internal Use Tank overflow Pervious Surface Runoff Property drain External Use Storm Water network Sewer
14 Control logic required to operate the houses Generic profiles were used to replicate demand Individual rainwater tanks for each property
15 Potable Water = 600 l/household/day
16 Potable Supply Rainwater Tank 200 litres 600 litres 100 litres Garden 50% Household 50% Sewer
17 Pilot Study Feasibility and practicality of WOWC modelling for 100 properties 5,000 properties 27,000 properties
18 5000 Property Integrated Water Cycle: Model Stats 5,800 Buildings 5,301 Buildings with Water & Sewer connections 4,923 Buildings with rainwater tanks (res only) 23,197 Nodes 8,160 Pipes 15,147 Pumps 15,147 Weirs 4,921 Orifices 54,903 lines of RTC code
19 1D 2D linkages 2218 individual manholes linked to mesh Surface flow paths identified Building outlines ignored
20 Results: Stormwater
21 5000 households At peak flow 100 yr 2 hr storm with rainwater tanks
22 Rainwater tanks empty, fill and spill Overflow to Stormwater Network
23 Dynamic connection between Water Supply and Sewerage Systems Simplified representation of a house does not include losses from individual fittings Potable Water Sewerage
24 Questions?
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