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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

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

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

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

Exploring California Dams

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Indicates ratio of “Extremely High Hazard” Dams by County and associated Storage Capacity

Exploring California Dams

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Indicates ratio of “Low Hazard Dams” by County and associated Storage Capacity

Exploring California Dams

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Highlights ratio of Los Angeles County Dams by Hazard

Exploring California Dams

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Highlights ratio of Butte County Dams by Hazard

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

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.

Stormwater Drainage System Performance

17

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.

Stormwater Drainage System Performance

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100% 70% 50% 30%

System Efficiency

Stormwater Drainage System Performance

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5 in depth storm with high peak intensity

9 in depth storm with low peak intensity

Hydraulic Model Results Visualization

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HEC-RAS 1D Model Integrated HEC-RAS 1D-2D Model

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

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

Hydraulic Model Results Visualization1997 Flood Records

Hydraulic Model Results Visualization

Peak Flow Profile for Sacramento River

Levee Breach Scenario

www.jacobs.com | worldwideSeptember 18, 2018© Copyright Jacobs

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