Wednesday, February 27, 2013

HydroPortal Will Experience Service Disruption this Friday 3/1/2013


Please be advised that HydroPortal, CUAHSI’s server that hosts a number of databases in the HIS Catalog, will experience service disruption this Friday, March 1 as CUAHSI relocates to a new office suite. During this time, data from the following publicly registered web services will be unavailable: 



The outage will likely last through the morning, but we will try to get the server relocated and back up as soon as possible. Please feel free to contact me with any questions or concerns.



Tuesday, February 26, 2013

CUAHSI Community Teleconferences on Informatics

On the first Wednesday of each month, CUAHSI hosts a community teleconference on Informatics that features research and projects involving, or are of interest to, the water science community. We have started to record these calls, so if you are unable to join the call you can still view the presentations!

To view previous calls, visit this page on the CUAHSI website. As of now, only February's call is available, which included presentations about The Swiss Experiment Platform and Sustainable Environment Actionable Data.

Tuesday, February 12, 2013

Can I Publish Gridded Data in HIS?

If you don't mind converting your data, then, yes!

The CUAHSI HIS was developed with the specific structure of a time series data in mind. This structure is typical of data from a stream sensor or other observations at a specific location. But what of other data types that are gridded such as precipitation estimates and model results? These data have not been publishable in HIS in the traditional manner, but it is possible to convert such data into the time series structure. There are multiple data sources registered in the HIS Catalog that have utilized such a conversion process; included in these are Multi-Sensor Precipitation Estimates from National Weather Service River Forecasting Centers as well as NASA NLDAS data. This approach is described in a recent Computers & Geosciences article:

John A. McEnery, Paul W. McKee, Gregory P. Shelton, Ryan W. Ramsey, Hydrologic information server for benchmark precipitation dataset, Computers & Geosciences, Volume 50, January 2013, Pages 145-153, ISSN 0098-3004, 10.1016/j.cageo.2012.08.005.
(http://www.sciencedirect.com/science/article/pii/S009830041200283X)

The authors demonstrate this technique with NEXRAD radar data , the significance of which is described in the article's abstract:

"Over the past two decades, with the advent of NEXRAD radar, science to measure and record rainfall has improved dramatically. However, much existing data has not been readily available for public access or transferable among the agricultural, engineering and scientific communities. This project takes advantage of the existing CUAHSI Hydrologic Information System ODM model and tools to bridge the gap between data storage and data access, providing an accepted standard interface for internet access to the largest time-series dataset of NEXRAD precipitation data ever assembled."

See below for a few examples of data sources in the HIS Catalog that have used this method: