Environmental

hydrological data, hydrological methods, hydrology, hydrology blog, hydrology corner, water data, Rating Curves, Monitoring

Will the US Geological Survey Go Metric?

Environmental

hydrological data, hydrological methods, hydrology, hydrology blog, hydrology corner, water data, Rating Curves, Monitoring

Do you have enough bananas?

Environmental

hydrological data, hydrological methods, hydrology, hydrology blog, hydrology corner, water data, Rating Curves, Monitoring

A New Frontier – Rating Curves from Space?

Environmental

hydrological data, hydrological methods, hydrology, hydrology blog, hydrology corner, water data, Rating Curves, Monitoring

Real or Not? Discharge as a Virtual Variable

Rivers Forming, Hydrology, Hydrometric Monitoring

The Hydrology of Tree-Like Figures on the Desert

By Stu Hamilton  |  January 6th, 2012  |  Environmental,  Featured Posts  |  0

I came across this aerial photo by National Geographic and was compelled to post on the hydrology of how such a stunning river would develop. Dendritic drainage structures originate from sheet flow – downslope movement of water as a thin sheet – which converges or diverges on an uneven surface. Where convergence occurs the water develops more power (mass x velocity), which mobilizes sediments. This erosion deepens the channels, concentrating even more water and new rills develop as water flows into the deepening rill. The watershed boundary seen between the main branches of this stream will eventually close in to … Read More

The Measurement of Measurement Uncertainty

The Measurement of Measurement Uncertainty

By Stu Hamilton  |  December 9th, 2011  |  Environmental,  Featured Posts  |  0

How much confidence should you have in your measurements? For a discharge measurement result of 50.0 m3s-1, is the true value is between 49.95 and 50.05, as inferred by the trailing zero?  Maybe the true value is anywhere between 47.5 and 52.5 (+/- 5%), a range commonly used to determine ‘goodness of fit’ to a rating curve. Perhaps the measurement wasn’t made under ‘ideal conditions’, which is a qualifier usually associated with the assumption that the true discharge is within 5% of measured discharge. Our ability to make a measurement that provides a result that is very close to the … Read More

NK-LF5-11

North American Stream Hydrographers

By Stu Hamilton  |  December 2nd, 2011  |  Environmental,  Featured Posts  |  0

Measuring and monitoring streamflow is a place-based activity. Hydrographers are isolated from each other because of the size of the geographic domain each one can cover. Training opportunities and technology workshops are often organized along institutional lines. Hydrographers often have closer communication with distant colleagues in the same institution than they have with those operating gauges close to home who work for other agencies. However, there is a collective shared experience that encircles the globe. There is a kinship amongst those who understand the challenges of the activity of streamflow measurement.  Operating a stream gauging program requires cunning and craftsmanship. … Read More

CyberinfrastucFigure

62nd OGC Technical Committee Meeting – Boulder, Colorado

By Touraj_Farahmand  |  November 25th, 2011  |  Featured Posts,  Technology  |  0

I attended 62nd OGC Technical Committee meeting in Boulder, Colorado with my colleague Stuart Hamilton in September. As most of you probably know, the Open Geospatial Consortium (OGC) is an international industry consortium of 438 companies, government agencies and universities participating in a consensus process to develop publicly available standards for geospatial data exchange protocol and web services. OGC standards are technical documents that detail interfaces or encodings and software developers use these documents to build these interfaces and encodings into their products and services. Aquatic Informatics is participating in the Hydrology OGC Domain Working Group (DWG or WG). This … Read More

Hydrological methods, hydrology, Hydrology Blog, Hydrology Corner, Water Survey Canada, Water Data Management, Monitoring Software

Central Services – New software for the Water Survey of Canada

By Ed Quilty  |  November 22nd, 2011  |  Business,  Environmental,  Featured Posts,  Technology  |  0

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 monitoring. The process generally involves visiting a monitoring site once or twice a year, collecting the data from the sensors, and returning to the lab to analyze it, generate a report, and use the results to inform policy decisions. It’s hard to argue that good … Read More

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