Blog

GLOS Data Challenge.

The Great Lakes hold 21% of the world's fresh surface water by volume. Only the right information today can ensure the sustainable use of these waters for generations to come. In North America, the Great Lakes account for 84 percent of fresh surface water. Today, these lakes are sourced for drinking water for over 40 million people. One and a half million U.S. jobs and...

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An illustration of stage-discharge rating curves.

Almost everything we know about our global freshwater resources is due to the humble stage-discharge rating curve. The vast majority of all flow data ever produced is the derived result of a transform from a variable that is easy to monitor continuously (stage) to a variable that is impossible to directly measure continuously (discharge). This means we are dependent on rating curves for advancements in...

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Magnifying glass on a Dodo bird, an extinct species.

I have been playing around with Paul Whitfield and Jennifer Dierauer’s Flowscreen R package designed for detecting trends and changepoints in hydrological time series and it got me thinking about how time series data analysis may be becoming an endangered activity. The immediate priority for any monitoring agency is to provide data for urgent requirements. Real-time data dissemination is king. You need to go well...

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A photo of working with a stream velocity rod.

There are several highly sophisticated technologies available for measuring streamflow. However, no amount of electronic wizardry will guarantee that you come home with a good discharge measurement. There are many things that can wrong such as with the electrical power or electronic communication between the system components. In the event as an electronic failure you are screwed because these devices are so expensive that no...

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An illustration showing sensors.

The theme of the CWRA 2016 conference in Montreal was “Water Management at all Scales: Reducing Vulnerability and Increasing Resilience”. Three days of presentations related to this theme got me thinking about what we need to be doing better in order to be better custodians of damaged, threatened and pristine water systems. We are the inheritors of a legacy of misguided decisions that have left...

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An image showing drones for hydrometry.

A different point of view changes nothing but it can change everything. Last week I wrote about how unmanned Aerial Vehicles (UAV), also known as drones, could be used for Large Scale Particle image Velocimetry (LSPIV) to get surface velocity measurements, which when combined with surveyed cross-sections can produce extreme flow gaugings. That same drone, equipped with the same camera, can also provide the cross-sectional...

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An image showing stage discharge rating curve.

Extreme flows are extremely hard to gauge, hence we get very few gaugings to accurately define the top-end of stage-discharge rating curves. This is a problem. Whereas empirically calibrated functional relationships can be trustworthy for the purpose of interpolation, they can be notoriously unreliable for extrapolation. One needs to be very careful about extrapolating any rating curve to an ungauged extreme....

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Water For Food, Global Water Withdrawals Graphic.

By 2050, a world population of 9 billion will require 60% more food. The security of our global food supply is highly reliant on adequate water supply. According to the United Nations, “agriculture is the biggest water user, with irrigation accounting for 70% of global water withdrawals.” While the global population is growing, water supply is not. So to meet 2050 food demands, it’s important...

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Map of the world with graphics depicting "shared value".

It is increasingly the case that when I am talking to people about what AQUARIUS software ‘should’ do, I find that there are multiple motivations for what ‘should’ means. There are many different ways that value can be perceived and product development depends on this perception. The concept of "shared value" is where companies can solve society’s problems and make profit at the same time....

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