GeoSpatial Water Distribution, Sanitary Sewer and Stormwater Network Modeling

Transcription

1 2009 Bentley Systems, Incorporated GeoSpatial Water Distribution, Sanitary Sewer and Stormwater Network Modeling Angela Battisti, Gary Griffiths Bentley Systems Inc

2 Presenter Profile Angela Battisti, CE, MBA Civil Engineer Master in Business Administration 6 Years of Water Industry Experience 3 Years of Hydraulics & Hydrology Modeling Training Experience Over 500 Presentations and Training Worldwide

3 Benefits of hydraulic modeling Why use Models? To gain commanding knowledge of their Water, Wastewater & Stormwater infrastructure and make informed decisions. Minimize Costs Capital investment, operations and maintenance. Maximize Benefits Hydraulic performance & system reliability.

4 Models let you see what is happening in your pipes

5 And predict the future before you build

6 How are the models used? Site development Urban stormwater management Distribution Mains Fire flow analysis Typical Users Plan & regulatory reviewers Design & consulting firms Municipal & Governments Regional drainage planners Site designers Utility operational engineers Detention & retention facility designers Roadway & transportation designers Master Planners Academia Master planning Sewer capacity analysis Water Quality Modeling Pumping Optimization

7 GIS / Water modeling relationship Build Water models from GIS data Maintain model up-to-date Load Water models from billing records (meters) Assign demand elevation from terrain files Correlate model results with GIS data (ex: queries vulnerable pipes and hospitals) Generate reports, export to Google Earth, etc.

8 Why build models from GIS? Because it is much faster and easier to build your model from GIS than any other method, provided you avoid some pitfalls CAD x,y x,y GIS J-1 z=357 ft x,y P-1 d= 8 in L= 320 ft c= 111 Ductile Iron Start node =J-1 Stop node = J-2 J-2 z=365 ft x,y

9 WaterGEMS WaterGEMS Modeling Data *.wtg ArcGIS MicroStation *.wtg.mdb *.mxd *.dgn AutoCAD Stand Alone *.dwg *.dwh The only 4 platform water distribution modeling package on the market!! One single model file, four platforms included!

10 Interoperability 4 Platforms one database

11 BUILDING A HYDRAULIC MODEL FROM GIS DATA

12 It s all about relationships GIS features WaterGEMS elements

13 Not always a 1:1 relation GIS features WaterGEMS elements

14 Importing GIS to model : ModelBuilder GIS Sources in WaterGEMS, SewerGEMS, HAMMER (ArcGIS interface): Geometric Network, Geodatabase features, and Shapefiles GIS Sources in WaterCAD, SewerCAD, CIvilStorm, PondPack or StormCAD : Shapefiles

15 GIS not created with hydraulic model in mind GIS has: Hydraulic modeling needs:

16 Element Representation Gate valve Check valve Tee fitting REAL LIFE Flowmeter Pump NEEDED FOR MODEL STATION IN GIS

17 What is a pipe? Air release Valve Control Valve Isolation Valve Main Service lines Hydrant Detailed view J-201 P-21 P-22 PRV-4 J-202 Skeletonized Model View

18 Skelebrator Reduces model size intelligently Depends on use of model

19 Before Skelebrator

20 After Skelebrator

21 Avoiding Connectivity Issues Pipes without end nodes Pipes that don t connect but should Pipes that appear to connect but aren t Pipes that cross without junctions

22 Connectivity rules and Network Navigator

23 Maintaining GIS and model up-to-date GIS GIS GIS Model Model Model Day 1 Year 1 Year 2

24 GIS rules and GIS ID

25 What s that GIS ID? 1:1,or, many :1,or, 1: many ModelBuilder will intelligently maintain GIS-ID when: Deleting Morphing Splitting pipes Merging Nodes in Close Proximity

26

27

28 ADDING DEMANDS

29 LoadBuilder- Automated Load Assignment Water Consumption Data Loading Flow Monitoring Data Loading Land Use Parcel and Census Data Loading

30

31 Automated Elevation Extraction Automated extraction of elevations from digital elevation models Intelligent elevation assignment Assign elevations to all node elements Create new what-if elevation or replace existing elevation

32

33

34

35

36 Citywater saves money through Modeling Townsville, Australia Fastest growing city in the state of Queensland 134 km of gravity mains, 17.5 km of rising mains (force mains) 20 pumping stations Citiwater Townsville s water and sewer business unit Responsible for: monitoring capabilities of existing system managing infrastructure improvements to ensure it can support expansion Consulting firm: GHD Pty. Ltd. Develop a calibrated model of the 4 main regions of Townsville Provide a 15-year planning report for southern suburbs of Townsville

37 Model Building process Created sewer model directly from GIS Shapefile and Drawing Review to «clean» the data 10% Analysis 2500-pipe sewer model Calibration 20% Model Building 70% Sanitary loading data from the 250 subcatchments in MapInfo GIS, imported using ModelBuilder

38 Calibration of flow Analysis Calibration Calibrated using 4 scenarios: Model Building Steady-state and average daily flow Steady-state and peak daily flow To calibrate observed flows in gravity sewer Extended-Period and average daily flow Extended-Period and peak daily flow To calibrate flows in pumping stations and rising mains (force mains)

39 Modeling Results Achieved high level of validation to use Wastewater model to: Confidently make important financial decisions regarding future augmentation work Undertake capital works planning and design Make overall operations and maintenance adjustments Increase the accuracy of emergency planning Conduct financial analysis

40 Recommendations 1. Decide who, how, when of model maintenance BEFORE you build the model 2. Plan GIS schema for use in Hydraulic modeling IF possible. ESRI template 2. Create and maintain unique GIS IDs 3. When building model obtain necessary data not likely to be in GIS: pump curves demand/loading patterns pump and valve controls more

41 Resources Tech Support Tech Notes: Building a Model Using ModelBuilder Updating A Model Using Model Builder Updating Source File Using Model Builder Discussion Forums: BE communities Water and WasteWater Hydraulicmodel.com

42 2009 Bentley Systems, Incorporated Thank You!