data analytics tools for improved decision making in flood ......data analytics tools for improved...
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Data Analytics Tools for Improved Decision Making in Flood Risk Management
September 6th 2018
Chakri Malakpet, PE, CFMProject Manager
Co-authors:Paul Robinson, Steve Micko
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Presentation Outline• What is Data Analytics?• Data Analytics Framework and Tools• Flood Risk Management Applications
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What is Data Analytics?
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What is Data Analytics?• It is the process of examining raw data using specialized
computer systems with the goal of discovering useful information.
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Why Data Analytics?• Performs qualitative analysis of large volumes of data to
uncover hidden patterns, trends and other insights• Enables improved and fast decision-making• Provides powerful visualizations of information for better
“story-telling”• Efficient and cost-effective for generating, storing and
sharing information
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Data Analytics Framework and Tools
Collection
• Event Data• Time Series Data• Spatial Attributes
Cleaning
• Quality Control• Structure
Integration Analysis
• Descriptive Analysis• Predictive Analysis
Visualization
• Interactive Dashboards• Spatial Maps• Charts
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• Relational Database
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Data Analytics Framework and Tools
Collection
• Event Data• Time Series Data• Spatial Attributes
Cleaning
• Quality Control• Structure
Integration Analysis
• Descriptive Analysis• Predictive Analysis
Visualization
• Interactive Dashboards• Spatial Maps• Charts
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• Relational Database
CSV, Excel, Access, HEC-DSS, GIS Database, Shapefiles etc
Python or R Scripts Microsoft Power BI
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Flood Risk Management Applications
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Exploring California Dams
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Source Data: Division of Safety of Dams, California Department of Water Resources
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Exploring California Dams
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Indicates ratio of “Extremely High Hazard” Dams by County and associated Storage Capacity
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Exploring California Dams
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Indicates ratio of “Low Hazard Dams” by County and associated Storage Capacity
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Exploring California Dams
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Highlights ratio of Los Angeles County Dams by Hazard
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Exploring California Dams
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Highlights ratio of Butte County Dams by Hazard
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Stormwater Drainage System Performance
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PurposeAnswer the question of “What rainfall profiles represent the highest risk”?
Approach• Use HEC-HMS and
HEC-RAS model for 122 simulations for different rainfall durations, rainfall volume, storm intensity factor and shape, and varying efficiencies of the entire system.
Conclusion• The “shape” of the
storm profile is just as important as the total volume of rain.
• Corroborates with operator observations.
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Traditional SCS Type III
Rainfall Profiles – NOAA Atlas 14
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Stormwater Drainage System Performance
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PurposeAnswer the question of “What rainfall profiles represent the highest risk”?
Approach• Use HEC-HMS and
HEC-RAS model for 122 simulations for different rainfall durations, rainfall volume, storm intensity factor and shape, and varying efficiencies of the entire system.
Conclusion• The “shape” of the
storm profile is just as important as the total volume of rain.
• Corroborates with operator observations.
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Stormwater Drainage System Performance
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PurposeAnswer the question of “What rainfall profiles represent the highest risk”?
Approach• Use HEC-HMS and
HEC-RAS model for 122 simulations for different rainfall durations, rainfall volume, storm intensity factor and shape, and varying efficiencies of the entire system.
Conclusion• The “shape” of the
storm profile is just as important as the total volume of rain.
• Corroborates with operator observations.
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Stormwater Drainage System Performance
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100% 70% 50% 30%
System Efficiency
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Stormwater Drainage System Performance
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5 in depth storm with high peak intensity
9 in depth storm with low peak intensity
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Hydraulic Model Results Visualization
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HEC-RAS 1D Model Integrated HEC-RAS 1D-2D Model
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Hydraulic Model Results Visualization
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Bypass Model Upper Sac West Upper Sac East Natomas/Mid Sac
Feather River West Feather River East Lower Sac West Lower Sac East
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Hydraulic Model Results Visualization
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Interactive Dashboard to Visualize HEC-RAS Model Results:• Flow and stage hydrographs at calibration gage locations (over 100)• Peak flow and stage profiles for all river reaches (over 100)• Observed flow and stage hydrograph data at gage locations• Load and compare multiple model studies• Automated statistical measures of spatial variability of scenario results
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Hydraulic Model Results Visualization1997 Flood Records
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Hydraulic Model Results Visualization
Peak Flow Profile for Sacramento River
Levee Breach Scenario
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