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Water and Catchment Data Services
David R. MaidmentCenter for Research in Water Resources
University of Texas at Austin
River Science SymposiumSwansea, WalesApril 18, 2011
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Water and Catchment Data Services
• Water Data Services– WaterML
• Catchment Data Services– Watershed and River Data
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Water and Catchment Data Services
• Water Data Services– WaterML
• Catchment Data Services– Watershed and River Data
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• CUAHSI is a consortium representing 125 US universities
• Supported by the National Science Foundation Earth Science Division
• Advances hydrologic science in nation’s universities
• Includes a Hydrologic Information System project
http://www.cuahsi.org
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Catalog(Google)
Web Server(CNN.com)
Browser(Firefox)
Access
Catalo
g harv
estSearch
How the web works
HTML – web language for text and pictures
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Catalog
Server UserData access
Service re
gistratio
n
Search
Services-Oriented Architecture for Water Data
Catalo
g harv
est
WaterML – web language for water data
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Some terms and definitions
Web Service: A web service allows for information to be exchanged computer-to-computer over the internet
Portal: A one-stop shop that pulls together information from various sources and provides it to the user in a seamless fashion using a web site
Catalog: Like a library card-catalog, these provide summary level information on what data are available at the various sources
Exchange Schema: An agreed-upon data sharing format via which data owners publish data (e.g. WaterML)
Source: Dwane Young, Western States Water Council
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RainfallWater quantity
Meteorology
Soil water
Groundwater
We Collect Lots of Water Data
Water quality
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The Data are Collected by Many Organizations
…. and the data are continuously accumulating
Federal Agencies
State Agencies
Cities
River Authorities
Water Districts
Universities
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The Data have a Common Structure
A point location in space A series of values in time
Gaging – regular time seriesSampling – irregular time series
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They can be expressed in WaterMLDischarge of the San Marcos River at Luling, TX June 28 - July 18, 2002
USGS Streamflow data in WaterML language
The USGS now publishes its time series data as WaterML web services
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Colorado River at Austin
http://waterservices.usgs.gov/nwis/iv?sites=08158000&period=P7D¶meterCd=00060
I accessed this WaterML service from my hotel in Swansea at 8:21AM this morning (2:24AM Central Time)
And got back these flow data from USGS which are up to 1:15AM Central time
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OGC/WMO Hydrology Domain Working Group
Design of WaterML 2.0 and testing in Interoperability Experiments
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CUAHSI Water Data Services Catalog
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69 public services18,000 variables1.9 million sites23 million series
5.1 billion data valuesAnd growing
The largest water datacatalog in the world
maintained at the San Diego Supercomputer Center
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WISKI Water Data Management Systemfrom the Kisters company based in Aachen, Germany
Kisters has adopted the CUAHSI model for water data services
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WISKI Data Systems in the UK and Ireland
The technology to implement CUAHSI water data services in the UK is already deployed….
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WISKI Data Systems in the UK and Ireland
Surface water: 7696Rainfall: 13236Groundwater: 20184Effluent sites: 3658Water quality: 237Areal: 257 (for calculation of areal rainfall)Secondary gauging sites: 43 (for summarizing gaugings)Reservoirs: 239
46,000 sites
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Water and Catchment Data Services
• Water Data Services– WaterML
• Catchment Data Services– Watershed and River Data
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Organize Water Data Into “Themes”
Integrating Water Data Services From Multiple Sources
. . . Across Groups of Organizations
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Streamflow Data Services
2 services7 variables4,363 sites11,484 series9,493,968 records
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WaterTemperature Data Services
6 services11 variables11,158 sites22,953 series1,546,841 records
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Bacteria Data Services
1 service21 variables4,801 sites15,483 series297,849 records
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A Virtual Observatory for Catchments
Modeling
Weather and Climate
Monitoring
Remote Sensing
Catchment
Accessing and synthesizing data and models ……
…… doing this in “the cloud”
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A Question…
…..what is the telescope you use to view it?
Once you have a cloud…..
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HydroDesktop – an Open Source HISA web-based collaborative software design and development environment was set up on CodePlex.com. This site includes a discussion forum, wiki, source code repository and versioning system, and bug/issue tracking system.
http://www.HydroDesktop.org
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HydroDesktopA Hydrologic Information System integrates space, time and modeling
MapWindow SQLite
http://www.hydrodesktop.org – an open source software development
OpenMI
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Watershed Delineation in HydroDesktopUses EPA Waters Web Services
http://data.crwr.utexas.edu/JacobsWellSpring/ See demo at:
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A Social Networking System for Sharing Geospatial Data
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A new initiative – you are invited to participate
What Data Services are Needed to Support River Science?