The CUAHSI Hydrologic Information System (HIS) is an internet-based system for sharing hydrologic data. It is comprised of databases and servers, connected through web services, to client applications, allowing for the publication, discovery and access of data.

Key Components of CUAHSI-HIS:

HIS Triangle Diagram HIS Central - Data Discovery HydroServer - Data Publication HydroDesktop - Data Access Metadata Services - Service Registration and Catalog Harvesting Search Services - Geographic, Semantic, Time and Network Search Data Services - Water and Spatial Data


There are three types of computers that store and process data:

  1. HIS Central — contains copies of metadata which facilitates searches; works like a search engine, in that it harvests metadata from the data servers and allows it to be efficiently searched by the clients.

  2. HydroServer — stores, organizes and publishes data; allows metadata to be harvested by HIS Central and data to be shared with clients.

  3. Clients (such as HydroDesktop) — gives users a convenient interface to access data; retrieves metadata from HIS Central and retrieves data from HydroServers.

and three types of web-services that allow the computers to communicate via the internet:
  1. Data Services — allows water and related spatial data to be retrieved by the client (such as HydroDesktop) computers.

  2. Search Services — allows the client computers to perform searches of the search catalog at HIS Central.

  3. Metadata Services — allows HIS Central to retrieve the metadata necessary to build the search catalog.

that make-up the core of CUAHSI-HIS.


What you can do with CUAHSI-HIS?

There are three main ways to interact with CUAHSI-HIS:

  1. Data Users — search for data, retrieve data, organize data, analyze data and/or use data for modeling.

  2. Data Publishers — organize data, store data, and make data available to others.

  3. Tool and Technique Developers — create and share additional tools and techniques that are compatible with the CUAHSI-HIS system. While the CUAHSI-HIS team has developed many of the key tools and techniques for HIS, the team is only producing a few of the many possible pieces that could be incorporated into this system. This leaves open numerous opportunities for others, throughout the hydrologic community, to contribute to HIS, by developing additional tools and techniques.


What the CUAHSI-HIS team is doing for you?

The CUAHSI-HIS team has developed, and continues to make improvements to, a standards-based system for storing, managing, organizing, indexing, documenting and sharing data. In addition, it has developed, and is continuing to develop, tools and techniques for implementing many of the key pieces of this system. Finally, the team is providing on-going community support via numerous channels, including: forums/wikis, workshops, papers and presentations.


What's New

HIS in Action

CUAHSI is ready to lend a supporting hand to you and your research. Take advantage of CUAHSI's programs and services, including but not limited to our Hydrologic Information System (HIS) for data access, publication and analysis of hydrologic data. We want you to see how others are already incorporating our services into a variety of water related research avenues - and to learn how to unlock its potential for you!

HIS - Here and Now

Introducing HydroPad and HydroServer Lite: Two New Ways to Manage CUAHSI HIS Data [Tifani White]


HydroExcel 1.1.6 Released

This version of HydroExcel includes improved parsing of State and Country information from WaterML 1.1.

[To Download]


CUAHSI Hydrologic Information System Webinars

CUAHSI will present a series of 4 webinars this Fall on various topics related to using the CUAHSI Hydrologic Information System (HIS). These webinars will highlight how to use features and functions of the HIS system.



CUAHSI Conference on Hydrologic Data and Information Systems 2011—June 22-24, 2011

We had a great Conference on Hydrologic Data and Information Systems on June 22-24, 2011 in Logan, Utah. This was a unique forum for users, publishers and developers to share, learn, and explore issues of interest to the hydrologic informatics community, including CUAHSI-HIS.


HydroServer at the Arlington Regional Data Center

The NHWC Transmission describes in it's lead article, how the University of Texas at Arlington, together with NWS and other state and federal agencies, are using a CUAHSI-HIS HydroServer to ingest, store, and disseminate daily precipitation data (Multi-Sensor Precipitation Estimator values) from the National Weather Service – West Gulf River Forecast Center (WGRFC).

[View Article]


CUAHSI HIS 2010 Status Report Released

The CUAHSI HIS Team has produced a 2010 Status Report that details the current architecture of the system and anticipated changes for the next year. Let us know your thoughts about it using our feedback page.


Finding, Getting and Using Water Data

See a video where HydroDesktop is used to find, get and analyze the data necessary to describe the hydrology of Jacob’s Well Spring. There is an accompanying exercise document to go with it.

[More News]

© 2008-2014 CUAHSI-HIS

This material is based upon work supported by the National Science Foundation (NSF) under Grant Nos. 04-12975, 041-3265, and 06-22374.
Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.