City of San Jose Storm Sewer Master Plan Anne Symonds, PE and Mira Chokshi, PE 2016 Pacific Water Conference AWWA Hawaii Section HWEA February 4, 2016
Agenda Introduction and Goals of the Project Background on the City of San Jose Modeling Platform Model Development - Model Development Assignments - Rain and Flow Monitoring - Riverine Integration - Calibration and Verification Development of a LOS and CIP - Existing, Near Term and Future Progress and Next Steps 2 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Introductions of Project Team AECOM Team: - Anne Symonds, PM - David Wood, PIC - Mira Chokshi, Lead Modeler - Sharon Tsay and Dominique Brocard, QC City of San Jose Team: - Casey Hirasaki, PM - Shelley Guo, PIC - Rotating staff of modelers 3 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Key Goals of the Project Provide Knowledge Transfer - Split Modeling Work with City of San Jose - Provide Training - Provide Overall QC Use InfoWorks ICM to provide integrated pipe network and riverine model with 2D capability Provide City with Completed Master Plan including CIP by June 2017 (AECOM selected in 2013) 4 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Background on the City of San Jose Total area: 176.5 Square Miles 2010 Population: 952,562 1,150 miles of Storm Sewer Pipeline 1,500 Storm Outfalls Discharges to Guadalupe River and Coyote Creek 80% of system constructed between 1950 and 1979 Designed to various criteria Riverine System Managed by Santa Clara Valley Water District 5 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Modeling Platform InfoWorks ICM ICM Integrated Catchment Modeling Fully-dynamic state of the art hydrologic and hydraulic (H&H) model Key Features: - Import HEC-RAS channel geometry - Enables surface flow routing using two-dimensional (2D) modeling - Uses multi-core processors and graphics processing units (GPU) for parallel computer - Allows multiple modelers to work on the same model network simultaneously 6 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
H&H Model Development Overview Supported rainfall and flow data collection Imported pipes>=24 and manholes from City GIS All major creeks and open channels Developed documentation for training City staff Documentation serves as ongoing record of work Provided weekly informal training Training Memo #2 Excerpt 7 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Rainfall and Flow Monitoring Originally scheduled for Two seasons, third added City contracted directly with ADS Data reviewed and assessed First season calibration completed, Second season calibration underway Third season data collection underway (El Nino 9 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Spatial Variability in Observed Rainfall 10 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Gage adjusted radar rainfall (GARR) data 11 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Flow Monitoring Data Quality Check City/AECOM team reviewed flow data right after storm to identify any site issues (backwater, failure of sensors) Provided feedback to ADS to address flow meter sensor issues Process improved data quality and provided high quality data for calibration 12 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
H&H Model Development 24 inch and Larger Pipes 1,100 miles of storm sewer pipes - 540 miles of storm sewer pipes (>=24 ) in H&H model - 13,000 storm sewer manholes - 36 Large Storage Basins - 29 Major Pump Stations - 180 Flap valves at Outfalls (out of 1100 Outfalls) - 6,500 subcatchments 13 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
14 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
H&H Model Development - Used Parcel Types to Estimate % Impervious DCIA_LU % DCIA % NDCIA Rural Housing 11 8 Single Family>1acre 11 8 Single Family>0.23acre 15 12 Single Family>0.18acre 22 18 Single Family>0.11acre 24 26 Single Family>0.08acre 26 28 Single Family>0.06acre 28 32 Single Family<=0.06acre 35 0 Townhomes 50 10 Condominiums 68 0 Industrial 80 0 Apartments 89 0 Commercial 90 0 Mobile Home Park 17 37 Schools 35 0 Mixed Use 60 10 Water 0 0 Open Space 2 0 Parks and Fields 5 0 Freeways 90 10 15 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
H&H Model Development - Riverine Model Integration Gathered Creek Models from SCVWD Various ages and format of riverine models (1970-2012) Established most efficient way to develop the riverine models When available used: - HEC-RAS/2 model - Geo-referenced HEC-2 - ICM to develop based on LIDAR 16 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
H&H Model Calibration and Verification Hydrograph and Scatter graph for Flow meter GUA_08 17 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
H&H Model Calibration and Verification Hydrograph and Scatter graph for Flow meter GUA_22 18 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
H&H Model Calibration and Verification Bird Pump Station Wet Well Level Verification 19 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Model Verification for Surface Flooding Model Results Color Depth 2-6 > 6 20 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Other Supporting Work Coordination with City on LID incorporation Development of Land Use Layers for Existing, Near Term and Future Conditions (using City s 2040 General Plan) Development of Design Storms Review of Bay and River Levels including Climate Change Impacts 21 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Next Steps Include: Having a complete calibrated model Establishing preliminary LOS goals Assessing existing, near term and future system performance Setting LOS goals with stakeholders Developing list of system deficiencies Developing alternative projects to resolve deficiencies Analyzing the system to develop the most efficient CIP recommendations Environmental Review 22 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
Thank You Anne.symonds@aecom.com Mira.chokshi@aecom.com
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Vision, Purpose and Core Values Our purpose: who we are We are driven by a common purpose to positively impact lives, transform communities and make the world a better place. 25 City of San Jose Citywide Storm Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA
City of San Jose Storm Sewer Master Plan 2016 Pacific Water Conference AWWA Hawaii Section HWEA February 2, 2016