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Hydrometric Data App

It's great to see increasing amounts of hydrometric data available via the site, these data are often more time consuming to get hold of than they could be and instant access is a real benefit.  Data currently seem to be largely limited to daily flow data for most sites.  Do you know if (and when) this will be expanded to instantaneous flow and stage data?

Other enhancements which would be of great benefit are:

  1. Links through to the CEH NAFRA / Peakflow website where gauges are common for more in-depth data (e.g. via gauge number)
  2. Access to ratings used to convert recorded stage to flow - these are available on CEH site, but occasionally differ between CEH and WISKI
  3. Spot gauging data held in Wiski

Thanks again for all the lovely data.

adam parkes //

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Hi Adam,

Thank you for your comment and I am glad you see the increased access to data as beneficial.  Please can you add more detail as to what you would use the data for? Learning about people’s data requirements enables us to adapt what we can offer accordingly.

You have raised some excellent questions. Open (hydrological) data is new for us and we are finding out what our IT systems can / cannot cope with as well as the cost–benefit of making the different data sets available.

We have outlined our vision for the rest of 2019 which I hope will give you a flavour of what to expect. Over the rest of 2019 our focus will remain on daily data and we intend on:

1) Increasing the number of flow sites.

2) Adding groundwater data.

3) Adding rainfall data.

We will also look into increasing the amount of instantaneous flow data available although I expect that this will still only be available at a minority of sites at the end of 2019. Stage data is something else which is under consideration although this will not be added in 2019. Spot flows and rating data are currently beyond the scope of what we are considering.

We have been working with the NRFA and they are currently accessing all the data we are publishing. You can view live (daily) data on their website although you currently cannot download it.

 

Ella Fotheringham 1 vote //
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Thanks for the update Ella.  It great to see more data being added in accessible ways.  To answer some of your points.

Most of my work is around flood risk (largely for the EA) and need gauge flow and level data to undertake hydrological analysis and to calibrate hydraulic models.  Key datasets for us are:

  • Annual Maximum (AMAX) and Peaks Over Threshold (POT) flow data from each gauge - this is available from NRFA, but will not include most recent flood events.
  • Continuous flow data (15min) - This is generally requested manually from the EA (either internally or externally) and used to infill gaps in AMAX/POT records (above) or to allow calibration of hydraulic models.  Quick access to these data would be a great benefit, especially following significant flood events
  • Continuous stage data (15min) - Again, requested manually from EA, used to allow post flood assessments and model calibration.  www.gaugemap.co.uk can be used as a reference (scrapes EA via API) but no download option, really for "real time" visualisation of water levels
  • Rainfall data (continuous) - Used for hydrological analysis and hydraulic modelling - current requested manually.  Continuous (15min) data are far more useful than storage/daily data

The daily flow data currently available is of little use of extreme flow hydrology, though useful for other purposes.  

Regards stage - majority of flow gauges record water level (stage) and convert this to flow using a Flow/Stage (QH) rating relationship, so I would hope this wouldn't be any more onerous to add than flow.

Ratings and gauging data is probably better suited to the NAFRA website than the hydrometric app

Thanks again 

Adam

 

adam parkes 1 vote //
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Hello Adam,

Thank you for the information. It is really helpful for us to better understand how people would like to use the data.

To pick up on your point about stage data. You are correct that the majority of our sites measure stage and we then convert this to flow. The difficulty we face is the quantity of data. Whilst daily flow data is useful for numerous purposes, stage data is predominantly used for high flows and as such 15 min (instantaneous) data is required. We can (and do via river levels on the internet https://flood-warning-information.service.gov.uk/river-and-sea-levels) provide this directly from our telemetry systems (raw data). However, the volume of data is currently too big for us to continuously export the data from our quality assured data base which would be needed for model calibration etc.

Upgrading our systems to enable us to export this volume of data is something we are looking into. However, we are not in a position to fund the upgrades that would be required this year.

Kind regards,

Andrew

Andrew Chiverton 1 vote //