Flood Forecasting Initiative Guy Shalev Flooding impact Flood - - PowerPoint PPT Presentation

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Dec 24, 2023 303 likes •552 views

Flood Forecasting Initiative Guy Shalev Flooding impact Flood Forecasting Flood Forecasting Initiative Initiative The Google Flood Forecasting Initiative Goal: Scalable high-accuracy high-resolution flood forecasts and warnings globally

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Flood Forecasting Initiative

Guy Shalev

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Flood Forecasting Initiative

Flooding impact

Flood Forecasting Initiative

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Flood Forecasting Initiative

The Google Flood Forecasting Initiative

Flood Forecasting Initiative

Goal: Scalable high-accuracy high-resolution flood forecasts and warnings globally

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Flood Forecasting Initiative

The Google Flood Forecasting Initiative

Why Google? Why not (just) Google?

Public-facing interfaces Computational resources Access to global data (Elevation, user-generated data, etc.) Scalability Machine learning expertise Governmental mandate Hydrologic expertise Operational expertise Relationship with organizational consumers

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Flood Forecasting Initiative

Hydraulic model - Goal

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Flood Forecasting Initiative

Satellite imagery (Multiple sources) Government Google DEM generation Gauge measurements & forecasts

Hydraulic model - Overview

Google Hydraulic Model

(currently focusing on hydraulic modeling of riverine floods)

Inundation Map

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Flood Forecasting Initiative

Challenge: Elevation Maps

SRTM (NASA) Goal

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Flood Forecasting Initiative

Challenge: Elevation Maps

Goal

Bihar 1992 - 2016 Bryk et al.

Flood Forecasting Initiative

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Flood Forecasting Initiative

Producing Elevation Maps

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Flood Forecasting Initiative

Also allows annual updates Achieve 1 meter resolution & vertical accuracy

Multi-Asset Spatial Alignment

? ? ?

Where are the cameras pointing? What is the surface geometry? How does light reflect?

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Flood Forecasting Initiative

Elevation Map Example

Flood Forecasting Initiative

Google-generated Elevation Map SRTM

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Flood Forecasting Initiative

Surface to Terrain Generation

Flood Forecasting Initiative

Digital Terrain Model Digital Surface Model

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Flood Forecasting Initiative

Embankments and river bed Computational costs rise with higher resolution

Challenges

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Flood Forecasting Initiative

Components are divided to physical and conceptual They continuously interact with each

ther over time

Hydrologic Model Classic Approach

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Flood Forecasting Initiative

A Regional Hydrologic Model Using ML

Why Regional + ML? Main Challenges

Complex, non-linear process Abundance of data Scalability Ungauged basins Using the right metrics Data quality disparity Interpretability and uncertainty

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Flood Forecasting Initiative

Encouraging Results

Flood Forecasting Initiative

Kratzert et al. – Work in progress

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Flood Forecasting Initiative

Informing the Public

Flood Forecasting Initiative

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Flood Forecasting Initiative

Google Public Alerts

Public Alerts have already provided 100,000s of alerts to over 2 billion people Help local and public authorities communicate emergency messages

Search Maps Android

In Progress

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Flood Forecasting Initiative

Informing Governments

Flood Forecasting Initiative

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Flood Forecasting Initiative

Funded by Google.org Provide information to local NGOs to distribute to the community

Outsourcing Alerts

All our alerts are publicly available in human- and computer-readable formats

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Flood Forecasting Initiative

Patna Pilot

Flood Forecasting Initiative

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Flood Forecasting Initiative

Next Steps

Increase lead time Improve communication infrastructure Support new drivers of floods Ganges & Brahmaputra India Globally

Improve forecasts Scale Up

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Flood Forecasting Initiative

Thank You!

Flood Forecasting Initiative