Peter Dumble

Peter Dumble is an Independent Hydrogeologist specializing in groundwater monitoring. His practical experience is informed by parallel careers in consultancy and as the founder and MD of an equipment manufacturer and supplier. He now uses his skills to support development work, encourage research, and in the delivery of groundwater methodology and water level monitoring training courses in the UK. He has contributed to several peer-reviewed papers on groundwater sampling methodology and is a co-author of UK landfill monitoring guidance. He writes a regular blog for In-Situ, in which he tries to bridge the knowledge gap between science and good field practice.

Posts by Peter Dumble:

Sampling Groundwater in a DNAPL Source Zone

Posted on: 13 Aug 2019

Managing Uncertainty when Low-Flow Sampling At this year’s Land Remediation Expo at the NEC in Birmingham, September 11-12, 2019, I am presenting a summary of practical findings arising from research at the University of Birmingham related to the complexity of … Continue

The Drilling Course, 2019

Posted on: 24 Jun 2019

A Damp but Successful 6th Annual Drilling Course Here’s a picture of the course group and trainers from the 6th Annual Redr[1] / University of Cranfield drilling course (, which took place between May 7-10, 2019. There was the usual … Continue

Supporting MSc Hydrogeology at Birmingham University

Posted on: 29 Apr 2019

It been more than 40 years since I was a student on the MSc Hydrogeology course at Birmingham University and 20 years since I was first invited to lead a demonstration and talk on groundwater sampling equipment for students there. … Continue

Data Reveals Ties Between Rainfall and Groundwater Levels in a Village Well

Posted on: 12 Mar 2019

I have been monitoring groundwater levels from a well in the village where I live in Devon, England, since January 2014. In the last year I’ve become aware of a hydrologist in the village who has been collecting daily rainfall … Continue

Earth Tides and Cyclical Groundwater Level Fluctuations
Gravitational Effects on Groundwater Levels

(Part 3)

Posted on: 07 Feb 2019

  Since writing my last two blogs (Groundwater Levels and Earth Tides – Part 1 and Part 2), I’ve received links to more recent research relating to semi-diurnal and diurnal groundwater level changes, including those caused by Earth Tides. I felt … Continue

Earth Tides and Cyclical Groundwater Level Fluctuations
Gravitational effects on Groundwater Levels

(Part 2)

Posted on: 09 Jan 2019

  In my last blog, Groundwater Levels and Earth Tides – Part 1, I presented a six-month record of hourly groundwater level measurements from the Indian sub-continent showing daily cyclical variations of approximately 10 cm per day (Figure 1). Figure … Continue

Earth Tides and Cyclical Groundwater Level Fluctuations
Gravitational Effects on Groundwater Levels

(Part 1)

Posted on: 05 Dec 2018

I recently reviewed some high-frequency groundwater level monitoring data from several wells and observation boreholes located within a few kilometres of the Indian Ocean that had been described in a report as demonstrating “tidal” influences. The term “tidal’ infers that … Continue

How Much to Purge?

Posted on: 17 Jul 2018

A modeling approach to purge volume guesstimation A novel approach to determine an optimum groundwater purging and sampling strategy was published last year in the Journal of Hydrology (Qi et al, 2017). This paper uses a numerical model to estimate … Continue

Groundwater Sampling – Are we doing it right?

Posted on: 29 Nov 2017

The Future of Contaminated Land Risk Assessment I was recently invited to lead a groundwater sampling workshop at the Janet Watson meeting of the Geological Society on November 7th, 2017. This was a fascinating 2-day conference covering everything from conceptual … Continue

Big Data and Barometric Compensation

Posted on: 01 Nov 2017

Is global barometric data accuracy good enough? I was recently sent some information of a research group working on the design of a low cost data logger system for measuring water levels. This is conceptualized as a total pressure logger, … Continue