There were three NASH sessions held during the CWRA national convention in Winnipeg on June 2, 2015. The sessions were very well attended with the room over-flowing with standing room only.

Session 1: Advancements in Stream Hydrography

Stuart Hamilton presented "Shifting the paradigm by blending best practices Or: what to do when the shift hits the fan". The problem of defining a relationship between stage and discharge while the shape of the relation is constantly changing was described. Various solutions to the problem were presented along with the geo-political history of divergence in approach. The underlying similarities of the solutions was discussed. a proposal was presented that the choice of solution should be guided by the physical process being modeled rather than by geo-political tradition.



Jeff Woodward presented "Experiences to date using Acoustic Doppler Curent Profilers for Determination of Discharge under Ice Cover". Paul Campbell had prepared the talk but was unable to attend.Jeff provided background on the problems with winter measurement and the advantages of using ADCP. The setup requirements for both hardware and software and the development of standard operating procedures were discussed. There were many lessons learned along the way that Jeff was able to share.


Stuart Hamilton presented "The Value of Water Monitoring". Highlights from the new eBook with the same name were presented. In the course of writing the eBook Stuart was outraged at the neglect of water monitoring as a basis for water management decision-making. Decision failure is more often attributed to bad luck or an inevitable consequence of climate change than to a structural deficit in relevant meaningful and timely water data.


Erika Klyszejko presented the "Environment Canada Data Explorer". This powerful application for data search discovery and access has many rich features that many people are unaware of. It is map-based and is designed so that users can readily customize and add their own map layers.Rich location metadata is readily searchable providing a powerful filtering capability. Visual display of colour coded metadata assists in rapid evaluation of data integrity and completeness. As well as map-based geospatial context ECDC support the discovery of historical context for the data.


Session 2: Innovations in Velocity Index Methods

Russell Boals presented "Velocity Index Methods isn Storm Water Management". Russell described a very interesting case study demonstrating the use of index velocity for monitoring urban flow in Quebec City.


Parsa Aminian presented "Simplified Methods of Discharge Estimation for an Inland Coastal Wetland in Southern Manitoba. Parsa investigated the challenge of monitoring flow through reversing channels, where the flow reversals are dominated by wind setup. The search for cost effective alternatives to expensive technological solutions is familiar to many stream hydrographers. Parsa's tested three innovative approaches that would only require the used of an ADVM for the setup and calibration phase.


Jeff Woodward presented "AVM Experience in Prairie Northern Region Water Survey of Canada". The development of deployment strategies for AVM has involved trials and quite a few errors. This is not surprising. The very conditions that create conditions unsuitable for the use of a standard rating curve are quite often quite unfavourable for the deployment of submerged technology. There are many lessons learned. Hydrometry isn't for quitters.


Session 3: Reference Hydrometric Basin Network (RHBN)

Mike Major presented "The National Hydro Network: Let's put this data to work". The NHN is a comprehensive geospatial dataset of hydrological features, It is openly shared and can help ensure that water data in Canada can finally be put in a meaningful context.


Erika Klyszejko presented "Canadian Geospatial Database of Basin Characteristics". This is a new Canadian initiative that is modeled on the USGS GAGES database. This database will provide a comprehensive set of geospatial characteristics for gauged watersheds. It is envisioned that this will be of particular value to represent hydrologic conditions which are least disturbed by human influence.


Paul Whitfield presented "A Century of Change in the Bow River in Banff National Park" . The Bow River is a national treasure, a mostly pristine, mostly protected watershed with over a hundred years of stream gauging. Paul decomposed the signal into regions with possible technological or land-cover artifact that could confound climate stability analysis.


Paul Whitfield presented "Reference Hydrologic Networks". It has been 20 years since the RHBN was established. The legacy value of long term records from pristine basins must be clearly articulated. Deficiencies in the network must be reviewed. The legitimacy of designated stations must be periodically re-evaluated seeing as the watersheds themselves do not receive protected status.