National Ground Water Association (NGWA)

Five principles of uncertainty for modelers discussed in November-December issue of Groundwater


Courtesy of National Ground Water Association (NGWA)

If you’re a member of the NGWA Scientists and Engineers Section, you will soon receive your copy of the November-December 2017 of Groundwater®, an issue brimming with a wide range of topics.

In his Guest Editorial, Randall J. Hunt offers five principles of uncertainty for groundwater modelers. He argues that uncertainty must be presented in a way that is easy to understand. Admitting there are many things we do not know will improve acceptance of the things we do know.

Kelvin Wong and Marirosa Molina offer a vision for future studies to apply molecular techniques to study the underexplored areas in virus transport science in their Issue Paper.

There are also two Book Reviews — Kathryn Ward discusses the book Hydraulic Fracturing Wastewater: Treatment, Reuse, and Disposal by Frank R. Spellman, while Donald I. Siegel talks about Unconventional: The Development of Natural Gas from the Marcellus Shale by Daniel J. Soeder.

Eight Research Papers are also found in this issue of Groundwater:

  • Daniel Franco et al. show how the removal of the carbonate fraction in mixed siliciclatic sand and a carbonate aquifer causes minimal change in hydraulic conductivity and porosity.
  • Vitaly A. Zlotnik et al. offer a new analytical technique of groundwater mound evaluation in sloping aquifers that is an important tool for managed aquifer recharge design.
  • Yun Yang et al. present a study that aims at enriching the community of optimization techniques and multioptimal design of groundwater remediation systems.
  • Matthew J. Knowling and Adrian D. Werner offer guidance to modeling practitioners on the ability of groundwater model calibration to inform transient recharge.
  • Muhammad Hasan et al. use the Dar Zarrouk parameters as a tool for the evaluation of fresh-saline groundwater interface in South Punjab of Pakistan.
  • Rhiannon M. Garrard et al. present a test of the t-fADE, a transient nonlocal model, and solute retention on non-Fickian transport of conservative tracers in saturated porous media using lab sand columns.
  • Liangping Li et al. successfully use the EnKF with localization to calibrate a land subsidence model using InSAR data.
  • Ferenc Székely simulates head recovery in free-flowing wells under intermittent operation. These tests occur both in single confined and leaky aquifers.

This issue also features three Methods Notes:

  • Neil Terry et al. present SEER, a simple spreadsheet tool for rapid visualization of the likely outcome of two-dimensional electrical resistivity surveys.
  • Kristijan Posavec et al. utilize trigonometry laws in an innovative way to overlap recession segments of time series to create master recession curves.
  • Xin Peng and Hongbin Zhan provide an air compressibility correction for the seepage flux calculation in the Bouwer and Rice seepage meter.

There are also two Case Study papers. Hyeonju Lee et al. report on the impacts of seasonal pumping on stream-aquifer interactions in a large agricultural area in Korea, while Jing Li et al. discus the origin and evolution of aquitard porewater in the western coastal plain of Bohai Bay in China.

Finally, in their Historical Note, Craig T. Simmons and John W. Elder look back at the impacts of a pioneering experiment by Elder, exactly 50 years ago, on natural convection. This experiment was cited in numerous papers on density-driven flow as a benchmark now known as the Elder Problem.

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