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Electrical Conductivity Validation and Salinity A Cautionary Tale?

Thursday, 3 August 2017 21:15:09 Europe/London

Blog 26

Electrical Conductivity Validation and Salinity A Cautionary Tale?

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Posted in Pete's Blog By News

Part 2: Inconsistent guidance

In Part 2 of his article on the guidance for Low Flow Sampling hydrogeologist Peter Dumble highlights some of the variances between official publications and some notable research.

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Posted in Pete's Blog By Peter Dumble

Low Flow Groundwater Sampling – a misunderstood methodology?

Monday, 5 June 2017 17:16:29 Europe/London

Part 1: Evolution of Technical Guidance

Peter Dumble looks at how the guidance for low flow purging and sampling protocols has developed in part one of a two part article on low flow groundwater sampling.

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Posted in Pete's Blog By Peter Dumble


groundwater trainingOver 1000 delegates, 23 years and still in demand.

It is 23 years since the first groundwater training courses started at Cranfield University in 1994.  Well over 1000 delegates have attended these courses, mainly from the UK and Ireland with the occasional overseas visitor. You may well be one of those.

It is useful to reflect on how these courses have evolved and why they are still needed and relevant for today, so here’s a quick history of the groundwater sampling training course.

 

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Posted in Pete's Blog By Peter Dumble

Robin Hazell 1927 to 2017

Friday, 31 March 2017 10:17:00 Europe/London

A life in Hydrogeology

Peter looks back at the life and career of influential hydrogeologist Robin Hazell who passed away in February. Robin Hazell was a long-time member of the IAH (International Association of Hydrogeologists) and noted as a mentor for successive generations of hydrogeologists.

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Posted in Pete's Blog By Peter Dumble

Is barometric compensation always necessary?

Friday, 3 March 2017 09:30:00 Europe/London

Rationalising uncertainty when using total pressure loggers for groundwater level measurements

Peter Dumble discusses whether it is justifiable, in some circumstances, to use unvented total pressure loggers for water level measurements without post-correcting the data for variation in atmospheric (barometric) pressure.

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Posted in Pete's Blog By Peter Dumble

Purge Volumes in Groundwater Sampling - Part 2

Monday, 30 January 2017 09:56:07 Europe/London

Differences between purge volume calculations

In his last blog post Peter discussed a range of purge volume methods.  In part 2 of this post he looks in detail at the numbers involved and analyses the difference between the methods.

 

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Posted in Pete's Blog By Peter Dumble

Purge Volumes in Groundwater Sampling - Part 1

Wednesday, 4 January 2017 09:33:42 Europe/London

Science vs Guidance

Whilst acceptance of low flow and passive sampling methods are gaining ground, most technical guidance documents still recommend full purging of wells and boreholes prior to sampling. But how much water needs to be purged to achieve “full purging” – and what is the basis of these recommendations? 

Peter Dumble takes a look at 4 different approaches to calculating purge volumes.

 

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Posted in Pete's Blog By Peter Dumble

Groundwater Level Monitoring using Telemetry in Sierra Leone

Thursday, 1 December 2016 14:46:19 Europe/London

Experimental trial in a developing country – The good and the bad

Peter Dumble shares some practical experience from a telemetry trial carried out in Sierra Leone to collect groundwater level monitoring data.

 

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Posted in Pete's Blog By Peter Dumble

Groundwater Level Measurements – being professional?

Wednesday, 9 November 2016 18:21:21 Europe/London

Should we routinely be expressing uncertainty in our measurements?

In his latest blog, hydrogeologist Peter Dumble discusses the issue of accuracy in water level measurement.

When was the last time you checked out your dip tape?

 

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Posted in Pete's Blog By Peter Dumble
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