CUAHSI Hydrologic Information Systems

1. CUAHSI Hydrologic Information Systems David R. Maidment Center for Research in Water Resources University of Texas at Austin and Ilya Zaslavsky, David Tarboton and Michael Piasecki

2. CUAHSI Hydrologic Information Systems • Introduction to CUAHSI HIS • WaterOneFlow web services • Open MI hydrologic model interfacing system

3. CUAHSI Hydrologic Information Systems • Introduction to CUAHSI HIS • WaterOneFlow web services • Open MI hydrologic model interfacing system

4. Continental Water Dynamics GEON describes structure of the solid earth How do the water environment and the solid earth interact?

5. CUAHSI-Hydrologic Information Systems UCAR • CUAHSI –Consortium of Universities for the Advancement of Hydrologic Science, Inc • Formed in 2001 as a legal entity • Program office in Washington (5 staff) • Supported by the National Science Foundation Unidata Atmospheric Sciences Earth Sciences Ocean Sciences CUAHSI NSF Geosciences Directorate HIS

6. CUAHSI Member Institutions 109 Universities as of July 2006

7. CUAHSI Program Components

8. CUAHSI Hydrologic Information Systems • Introduction to CUAHSI HIS • WaterOneFlow web services • Open MI hydrologic model interfacing system

9. Water Data Water quantity and quality Soil water Rainfall & Snow Modeling Meteorology Remote sensing

10. Water Data Web Sites

11. NWISWeb site output # agency_cd Agency Code # site_no USGS station number # dv_dt date of daily mean streamflow # dv_va daily mean streamflow value, in cubic-feet per-second # dv_cd daily mean streamflow value qualification code # # Sites in this file include: # USGS 02087500 NEUSE RIVER NEAR CLAYTON, NC # agency_cd site_no dv_dt dv_va dv_cd USGS 02087500 2003-09-01 1190 USGS 02087500 2003-09-02 649 USGS 02087500 2003-09-03 525 USGS 02087500 2003-09-04 486 USGS 02087500 2003-09-05 733 USGS 02087500 2003-09-06 585 USGS 02087500 2003-09-07 485 USGS 02087500 2003-09-08 463 USGS 02087500 2003-09-09 673 USGS 02087500 2003-09-10 517 USGS 02087500 2003-09-11 454 Time series of streamflow at a gaging station

12. CUAHSI Hydrologic Data Access System http://river.sdsc.edu/HDAS NCDC NASA EPA NWS USGS Observatory Data A common data window for accessing, viewing and downloading hydrologic information

13. Observation Stations Map for the US Ameriflux Towers (NASA & DOE) NOAA Automated Surface Observing System USGS National Water Information System NOAA Climate Reference Network

14. NWIS Station Observation Metadata Describe what has been measured at this station

15. Web Page Scraping http://nwis.waterdata.usgs.gov/nwis/discharge?site_no=02087500&agency_cd=USGS&.... Programmatically construct a URL string as produced by manual use of the web page Parse the resulting ASCII file

16. CUAHSI Web Services Web Application: Data Portal • Your application • Excel, ArcGIS, Matlab • Fortran, C/C++, Visual Basic • Hydrologic model • ……………. • Your operating system • Windows, Unix, Linux, Mac Internet Simple Object Access Protocol Web Services Library

17. Series and Fields Features Series – ordered sequence of numbers Point, line, area, volume Discrete space representation Time series – indexed by time Frequency series – indexed by frequency Surfaces Fields – multidimensional arrays Continuous space representation Scalar fields – single value at each location Vector fields – magnitude and direction Random fields – probability distribution

18. North American Regional Reanalysis of Climate Evaporation Precipitation Variation during the day, July 2003 NetCDF format mm / 3 hours

19. Data Sources NASA Storet Ameriflux Unidata NCDC Extract NCAR NWIS Transform CUAHSI Web Services Excel Visual Basic ArcGIS C/C++ Load Matlab Fortran Access Java Applications http://www.cuahsi.org/his/ Some operational services

20. Operational Services

21. CUAHSI Observations Data Model (ODM) Stores local observational data and metadata about remote data sources

22. Federal State Local Academic Water OneFlow • Like Geospatial OneStop, we need a “Water OneFlow” – a common window for water data and models • Advancement of water science is critically dependent on integration of waterinformation

23. CUAHSI Hydrologic Information Systems • Introduction to CUAHSI HIS • WaterOneFlow web services • Open MI hydrologic model interfacing system

24. Project sponsored by the European Commission to promote integration of water models • Software standards for model linking • Uses model core as an “engine” • http://www.openMI.org

25. OpenMI – Links Data and Simulation Models Simple River Model Trigger (identifies what value should be calculated) CUAHSI Observations Data Model as an OpenMI component

26. User interface Typical model architecture Model application Application User interface + engine Engine Simulates a process – flow in a channel Accepts input Provides output Model An engine set up to represent a particular location e.g. a reach of the Thames Write Input data Run Read Engine Write Output data

27. Rainfall Runoff Model River Model Linking modelled quantities

28. User interface User interface Input data Input data Rainfall runoff River GetValues(..) Output data Output data Data transfer at run time

29. Models for the processes Rainfall(database) RR (Sobek-Rainfall -Runoff) River (InfoWorks RS) Sewer (Mouse)

30. 3 Rainfall.GetValues 7 RR.GetValues 6 Sewer.GetValues Data exchange Rainfall(database) 4 RR (Sobek-Rainfall -Runoff) 2RR.GetValues 1 Trigger.GetValues 5 8 River (InfoWorks-RS) call Sewer (Mouse) 9 data

31. Conclusions • CUAHSI Hydrologic Information System synthesizes water data and models • WaterOneFlow web services provide a common data window on water observational data from many sources • The observational data can be linked to simulation models using the OpenMI model interfacing system