Effects of Intraborehole Flows
Two new research papers published in 2019, by an Australian research group led by David Poulsen, build on earlier work by McMillan et al (2014) and others in improving our understanding of the depth origin of water samples collected from long-screened and open boreholes.
Background
When sampling groundwater wells and open boreholes, many practitioners think no further than using sampling guidance, which is generally only suitable for use in short-screened monitoring wells (i.e., three times well volumes, low flow and passive/no purge sampling methodologies). There are dangers in doing this, which I have explored in earlier blogs (see links below) and are a theme constantly evolving through my training courses and workshops.
Given the vast legacy of long-screened wells and open boreholes (practically, think of anything more than three to six metres in length, depending on which guidance you follow), we cannot ignore the use of long-screened wells for characterizing the water quality of groundwater. However, when we use these boreholes…
READ MORE
-
Most popular related searches
Related news
-
New Spaix Version Offers more Performance and Functionality
The latest Spaix version offers users a number of new features and improvements. With this release, VSX – VOGEL SOFTWARE has integrated new functions for the optimal configuration and curve calculation of centrifugal pumps as well as for quote presentation. “Our focus in developing the latest version of Spaix was once again on further improving the user experience,” comments Managing Director, Hanns-Henrik Vogel, on the new launch. “A large number of customer requests have been implemented....
-
ESdat Development Roadmap
ESdat Server (Web Interface) and ESdat Online. A major upgrade of ESdat Online and ESdat Server (Version 4) has recently been completed and was made available to ESdat Online and some Cloud Hosted users in early December 2020; it will be available to those with onsite or self-hosted systems in mid-Jan 2021. The enhancements deliver more and improved functionality to most areas of the application. A list of enhancements and new features is at https://www.esdat.net/ESdatServerAndESdatOnlineV4.aspx. Development...
-
Release of New Borehole Geophone String for S-Wave Tomography
Alternatively to the digital MBAS-D system the analog version of a borehole geophone string (MBAS-A) is available on the market.MBAS-A - Analogue Multistation Borehole Aqcuisition SystemThe instrument can be used for S-wave borehole tomography or downhole surveying. It consists of up to eight geophone stations each equipped with a tri-axial sensor. The string is fully water proof and can be used to receive P- and S-waves in dry or water filled boreholes. Please take detailed technical information from the product...
-
Two New Manufacturers Available in impeller.net PumpSelector
Since the beginning of July, products of two further manufacturers, Papantonatos and Pentair, have been available in the pump selection tool on the impeller.net Internet platform. This extends the portfolio of pumps and lifting units, in particular, for sewage technology and drainage as well as products for water supply and irrigation to a very broad range of brands. The PumpSelector of impeller.net brings buyers, manufacturers and sellers together on a new platform. The cross-manufacturer concept is unique in...
-
New: Intelligent SDI-12 depth sensor with microprocessor makes complex readings simple!
The new Pa993D SDI-12 submersible depth sensor uses an SDI-12 v1.4 communication protocol, comes in capacities of 0-1mWG up to 0-100mWG and can perform complex linearisation and calibrations, all thanks to its embedded 16-bit microprocessor. Here’s why we think it would benefit you. What is SDI-12 protocol? SDI-12 stands for serial data interface at 1200 baud. It is a standard communication protocol for interfacing intelligent microprocessor sensors to a data logger. Benefits of the Pa993D SDI-12...
