Worked example: Exploring model defects using linear analysis
Any groundwater model is riddled with imperfections. Do these compromise its decision-support utility? Linear analysis can answer this question.
SEGLISTS: Interpolation along linear features
This tutorial demonstrates several options for spatial parameterization of linear and polylinear features. In a groundwater model, these may represent entities such as streams, rivers, faults, or fracture networks. The hydraulic properties of these features may vary along their lengths. If this variability is relevant for a prediction of interest, then its representation in a …
PLPROC: a simple pilot point example
PLPROC allows a modeller to create and manipulate parameters that inform hydraulic properties that are represented in a numerical model. In doing this, PLPROC supports PEST in facilitating model-based decision-support which enshrines the principle that a model should encapsulate what we know and quantify what we do not. This tutorial offers a gentle introduction to …
Model Visualisation and Display
This tutorial shows you how to extract data from MODFLOW 6 input and/or output files, and record that data in files that are easily read by visualisation packages such as PARAVIEW, GIS packages such as QGIS, and display packages such as SURFER. Utilities supplied with the PEST suite can perform similar tasks for other versions …
PLPROC: Basics
PLPROC is a member of the PEST suite. Its primary use is for pilot points parameterization of models that use both structured and unstructured grids. This tutorial offers a quick overview of PLPROC in pilot points parameterization of a MODFLOW-USG model. Other utility programs from the PEST suite are also demonstrated. These translate data that …
LUMPREM: a Transient Recharge Model
Though it has nothing to do with parameter estimation, LUMPREM is a member of the PEST suite; it can be downloaded from the PEST web pages. LUMPREM is a simple, lumped-parameter recharge model. It generates time series of groundwater recharge using daily rainfall and potential evaporation as inputs. It can also be used to simulate …
Seeking Common Ground: Modellers and Geologists
On 28th October, 2020 GMDSI hosted a discussional webinar whose purpose was to address tensions which sometimes arise between modellers and hydrogeologists If you would like to watch the webinar, click here. After the webinar, some of our listeners had their say – you can read their comments or contribute your own at the bottom of …
Christmas cracker
We are calling this our “Christmas Cracker” webinar for two good reasons. Firstly, it was held just 10 days before Christmas. Secondly, it was entertaining, and easy to listen to.
Webinar series attracts international audience
Predicting the future of any environmental system is fraught with uncertainty; nevertheless, decisions must be made and risks must be assessed. This is where decision support comes in. The Groundwater Modelling Decision Support Initiative, an industry-aligned project supported by BHP and Rio Tinto sitting within the College’s National Centre for Groundwater Research and Training, recently …
Webinar series: Decision-Support Modelling Principles and Practice
In May and June 2020, GMDSI offered a four-part webinar series on decision-support modelling principles and practice. John Doherty and Catherine Moore presented the first three of these webinars, while the fourth was presented by John Doherty and Jeremy White (USGS and co-author of the PEST++ suite). The webinars were chaired by Craig Simmons (NCGRT), …
Webinar series: Decision-Support Modelling Principles and Practice Read More »