Post on 13-Jan-2016
description
transcript
Texas Water Information and Digital Libraries
David R. MaidmentDirector, Center for Research in Water
ResourcesUniversity of Texas at Austin
Water Problems in TexasFlooding
Drought
Water Quality
Environmental health
Texas Water Information and Digital Libraries
• Digital Water Information from CRWR• WaterML – internet water data services• Semantic web for water data• How can we move forward together?
Texas Water Information and Digital Libraries
• Digital Water Information from CRWR• WaterML – internet water data services• Semantic web for water data• How can we move forward together?
Digital Archiving of Theses, Dissertations and Reports
since 1994 at CRWR
CRWR Water Information Services
A digital archive that supports Senate Bill 3: Environmental Flows for Texas
Texas Natural Resources Information System (TNRIS)
Texas Water Information and Digital Libraries
• Digital Water Information from CRWR• WaterML – internet water data services• Semantic web for water data• How can we move forward together?
Consortium of Universities for the Advancement of Hydrologic Science, Inc (CUAHSI)
118 Universities in North America (and 3 in Europe)
NSF supports building a Hydrologic Information System (HIS)10
RainfallWater quantity
Groundwater
Water Observations Data
Meteorology
Soil water
Water quality
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Data are Published in Many Formats
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Services-Oriented Architecture
A services oriented architecture is a concept ‐that applies to large, distributed information systems that have many owners, are complex and heterogeneous, and have considerable legacies from the way their various components have developed in the past (Josuttis, 2007).
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We are at a tipping point…• Web pages • Web services
Internet
People interact with a remote information server
People interact with a network ofInformation services
InternetInternet
WaterML
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HTML as a Web Language
Text and Picturesin Web Browser
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><title>Vermont EPSCoR</title><link rel="stylesheet" href="epscor.css" type="text/css" media="all" /><!-- <script type='text/javascript' language='javascript‘ src='Presets.inc.php'>--></head>
HyperText Markup Language
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Point Water Observations Time Series
A point location in space A series of values in time
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WaterML as a Web LanguageDischarge of the San Marcos River at Luling, TX June 28 - July 18, 2002
Streamflow data in WaterML language
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CUAHSI Water Data Services
35 services15,000 variables1.75 million sites8.33 million series342 million data 18
Synthesis and communication of the nation’s water data http://his.cuahsi.org
Federal Water Data Academic Water DataState and Local Water Data
To make a complete picture of water data, we need to be able to add state and local data to national and academic data sources.
Regional Water Data Systems19
11 services4,816 variables15,645 sites645,565 series23,272,357 records
Texas Water Information and Digital Libraries
• Digital Water Information from CRWR• WaterML – internet water data services• Semantic web for water data• How can we move forward together?
• Search multiple heterogeneous data sources simultaneously regardless of semantic or structural differences between them
Data Searching
NWIS
NARR
NAWQANAM-12
request
request
request
request
request
requestrequest
request
request
return
return
return
return
return
returnreturn
return
return
Searching each data source separately
Michael PiaseckiDrexel University
Semantic Mediation Searching all data sources collectively
NWIS
NAWQA
NARR
generic
request
GetValues
GetValues
GetValues
GetValues
GetValues
GetValuesGetValues
GetValues
GetValues HODM
Michael PiaseckiDrexel University
Thematic ConceptsCore Concept Property Branch Leaf
Variables
Kate Marney, CRWR
http://test.hydroseek.net/ontology/Ontology.html
A Theme Layer
Synthesis over all data sources of observations of a particular variable e.g. Salinity
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Texas Salinity Theme
7900 series347,000 data
7900 seriesTPWD 3400TCEQ 3350TWDB 150
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Copano and Aransas Bay Salinity
Number of Data0 – 5050 – 150150 – 400400 – 10001000 – 3000
Copano Bay
Aransas Bay
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Texas Daily Streamflow Theme
USGS Data 1138 sites
(400 active)
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Austin – Travis Lakes Streamflow
Years of Data0 – 1010 – 2020 – 4040 – 6060 – 110
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Texas Water Temperature Theme
22,700 series966,000 data
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Texas Water Information and Digital Libraries
• Digital Water Information from CRWR• WaterML – internet water data services• Semantic web for water data• How can we move forward together?
Texas Digital Library Members
Many of these universities also have a Water Research Center
Senate Bill 3: Environmental Flows
Senate Bill 3 passed by the 2007 Texas Legislature
Provides for “Environmental Flows” in Texas Rivers and Bays
Basin and Bay Committees
CRWR Water Information Services
A digital archive that supports Senate Bill 3: Environmental Flows for Texas
Senate Bill 3 Information Needs Hydrology
Geomorphology
Water Quality
Aquatic Biology
Academic Information
Government Information
Conclusions
• I think Texas Digital Library is great!• We need to understand better how to
integrate digital objects with water data • How to connect TDL and TNRIS?• Is environmental flows a good focus?