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:

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

Purge Volumes in Groundwater Sampling – Part 2

Posted on: 18 May 2017

Differences Between Purge Volume Calculations In Peter Dumble’s blog (Part 1), he presented some notes on purge volume methods and indicated those which are supported by science and those which are included in guidance. In this blog, Dumble takes a hard look … Continue

Screen Volume and Low Flow Groundwater Sampling

Posted on: 18 May 2017

Fully or Partially Purged – Does It Matter? When taking a groundwater sample from a well or borehole, understanding just where the water sample originates within the groundwater body is critical, particularly when contaminants are present. Research by Lindsay McMillan … Continue