the geo aquawatch initiative -...
TRANSCRIPT
The GEO AquaWatch Initiative The Water Quality Community of Practice
Steven Greb
University of Wisconsin-Madison
GEO AquaWatch Director
CEOS WGISS-47 meeting
29 April-2 May, 2019
Silver Springs, Md.
• ~117 million lakes globally covering 3.7% of the Earth’s land
surface, coastal zones ~ 15 percent.
• Critical role in ecosystem services. Only 0.007 percent of the
planet's water is available to fuel and feed its 6.8 billion people.
• Water scarcity facing 1.8 billion people by 2025
• Sentinels of change and threatened globally by climate change,
eutrophication, toxicity.
• Many gaps in monitoring, particularly in developing countries
Inland and Coastal Waters
• AquaWatch aims to develop and build the global
capacity and utility of Earth Observation-derived water
quality data, products and information to support water
resources management and decision making.
GEO AquaWatch Goal
Lakes Mendota & Monona -University of Wisconsin SSEC imageChesapeake Bay Buoy – NOAA Image
AquaWatch Objectives
• Objective 1: Facilitate effective partnerships between the producers,
providers and users of water quality data, products and information.
• Objective 2: Improve analysis and integration of in situ and remote
sensing water quality data.
• Objective 3: Develop and deliver fit-for-purpose water quality products
and information services.
• Objective 4: Support technology transfer and access to water quality
data products and information.
• Objective 5: Advocate for increased education and capacity for the use
of water quality information for decision making.
AquaWatch Organizational Model
Water Quality
Knowledge Hub
Outreach and End User
engagement
Observations and Data
Products and Information
Distribution, Access and Visualization
Education and Capacity Building
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0.010
400 450 500 550 600 650 700 750 800 850 900
Rrs
(λ),
sr-1
Wavelength, nm
Chlorophylls, Carotenoids,
NAP, CDOM
TSM
Cyanonphycocyanin
Chlorophyll-a
TSM
COMPARISON OF EARTH OBSERVATION SENSORS SUITABLE
FOR WATER QUALITY ASSESSMENT WITH PUBLIC ACCESS
DATA POLICY
7
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0.005
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400 500 600 700 800 900
Rrs
(λ)
(sr-
1)
Wavelength (nm)
Landsat 8
OLI/TIRS
Sentinel-2
MSI
Sentinel-3
OLCI
Landsat 7
ETM+
1 2 3 4 5 6 7 8-10 11 12-16 17 18-19
1 2 3 4 5 6 7 8b
8a
1 2 3 4 5
8
8
1 2 3 4
The TIGER Water Observation
Information System (WOIS)
Examples of current data and product sources
Different……….
• Sensors
• Regions /AOI
• Time scales
• Time segments
• Product processing
Some open source/some proprietary
Different degree of validation
Bottom line……………..
Conflicting results from different products for same time/location
Disparate Data Sources
S2 WATER QUALITY PROCESSOR AND VIEWER
Workflow Landsat
ESA hubESA hub
Download Download Pixel
identification
Pixel identification Adjacency
correction
Adjacency correction Atmospheric
correction
Atmospheric correction
RGB RCORGB RCO
ZeZe
SPM SPM
bbp555bbp555
KdKd
FormattingFormatting
KdPARKdPARCloud flagsCloud flags
RrsRrs
User interface
User interface
RHOa RHOa
ANGANG
AOTAOT
metadatametadataTURTUR
VITO archive
VITO archive
Formatting to
NetCDF
Formatting to
NetCDF
L2WL2W
Download Pre-processing A/C L2W
CHLCHL
apig443apig443
Water quality processor + Water monitor
Two examples of WQ processors
GLOBAL TURBIDITY PRODUCT HARMONIZATION
• AquaWatch data inventory RealEarth Portal
• Embedded in AquaWatch Website
• Bring together data of varying file formats, naming conventions, and
columns, and transforming it into one cohesive data set
• Grab samples, buoy data, satellite products
• Visual display, time series, scroll across sources for data comparison
• Updated hourly
• Understanding all user needs
• In situ data- more data needed in underrepresented areas and water
types, access to databases for calibration and validation, standardization of methods, instruments, metadata, integrate with satellite data
• Satellite imagery accessibility and discovery tools, cloud resources,
algorithm library
• Increased interoperability and standardization of metadata, sensor
specification, calibration reports, updates on processing software
• Inland and Coastal Analysis Ready Data System- Demonstration
project (10-100m res. , 5-10 day).
Looking towards the future…………………
Upstr
eam………..D
ow
nstr
eam
Additional Resources and leverage ongoing work with similar objectives
UNEP World Water Quality Alliance, SDGs (6.3.2,14.1.1), GEO Initiatives,
CoPs
Continue Expansion of AquaWatch Knowledge Hub
• Understanding all user needs
• In situ data- more data needed in underrepresented areas and water
types, access to databases for calibration and validation, standardization of methods, instruments, metadata, integrate with satellite data
• Satellite imagery accessibility and discovery tools, cloud resources, algorithm library
• Increased interoperability and standardization of metadata, sensor specification, calibration reports, updates on processing software
• Inland and Coastal Analysis Ready Data System- Demonstration project (10-100m res. , 5-10 day). Incorporate in respective WPs?
Looking towards the future…………………
Upstr
eam………..D
ow
nstr
eam
Additional Resources and leverage ongoing work with similar objectives
UNEP World Water Quality Alliance, SDGs (6.3.2,14.1.1), GEO Initiatives,
CoPs
Continue Expansion of AquaWatch Knowledge Hub
Contact Information
AquaWatch Secretariat (Merrie-Beth Neely) at
Or contact Steven Greb, AquaWatch Director at the
University of Wisconsin at
Visit our website :
www.geoaquawatch.org