Hydrology Corner Blog: hydrological methods

Uncertainty Is the Unlocked Back Door Used by Unwanted Surprises

I had the great pleasure of re-connecting with colleagues at the NASH symposia at the AWRA 2014 national conference. There were three well attended NASH sessions and a panel discussion that were all great starting points for conversations. One such conversation about discharge measurement uncertainty with Tim Cohn resulted in the statement that is the title of this post. We were discussing the reasons for study into the problem of quantification of discharge measurement uncertainty.

Automation for Real-Time Hydrometric Data Production

Results from the 2012 Report – Global Hydrological Monitoring Industry Trends published by Aquatic Informatics Inc. The first Geostationary Operational Environmental Satellite (GOES) was launched in October 1975. The GOES launch initiated a sequence of events leading to a major re-design of hydrometric programs throughout North America. The relatively cheap and reliable data communication provided…

Mitigating Risk for Risk Mitigation: What L’Aquila Means for Water Monitoring

On October 22, 2012, six Italian scientists and a government official were sentenced to 6 years in jail, given lifetime bans on holding public office, and ordered to pay compensation of €7.8m in connection with the L’Aquila earthquake. The 6.3 magnitude earthquake injured over 1,000 people and resulted in 300 deaths. The judgment was based…

Central Services – New software for the Water Survey of Canada

CENTRAL SERVICES – New software makes data collection and analysis easier and faster for the Water Survey of Canada. “Annual data doesn’t help Saskatchewan or Winnipeg when there’s a flood event happening— we need to provide data to our customers instantaneously.” —AJ Leitch Policies that protect our water are borne, in part, of good water…

Accuracy and Error of Hydrological Measurements – Part 2

Click here to read Part 1 – background about measurement accuracy and error, definitions and more This series of discussions are to first give you a scientific picture of hydrological measurement errors and then open the interesting discussion of how to automatically detect, validate and correct erroneous sensor data given the observations from Data Acquisition…

Accuracy and Error of Hydrological Measurements – Part 1

Environmental agencies and organizations invest huge amount of money to build the required hardware and software infrastructure for collecting and storing data from field sensors in order to extract valuable information hidden in the time series numbers about the environment. If the sensor measurements could not accurately represent the environmental parameter of interest, the extracted…