Posts tagged #numerical modeling

Seepage flow modeling from mine waste dump with MODFLOW

This example is a simulation of a mining dump, which is a continuous source of concentrated leachate.

Hydrogeological complexities to consider: heterogeneity of the aquifer and the presence of fractured rock.

Groundwater system parameters:

 

 

Cost (& Time) optimization of hydrogeological studies

Impact on groundwater flow from mining facilities could be evaluated many times alongs the different mining phases, many of these evaluation are done by different consultant companies. This post is focused on strategies and best practices for cost (& time) optimization, specially for hydrogeological investigation on mining projects.

 

 

Assessment of land subsidence from pumping

 

The MODFLOW SUB-WT code has been developed to simulate vertical compaction in regional groundwater flow models because due to pumping. MODFLOW SUB-WT can simulate changes in groundwater storages and compaction in discontinuous layers or extensive confining units. The MODFLOW SUB-WT modeling code considers the compaction of a particular layer of the numerical model as a function of effective effort changes in the layer.

Posted on October 3, 2013 and filed under Modeling.

 

 

How much does a groundwater modeler cost?

 

After my last job as a staff groundwater modeler I have received 6 unsolicited job offerings. Of course many modelers with more years and more conections than I have received much more offers, however, I feel happy with my humble record. The point of this comparison is that senior groundwater modelers with experience in mining hydrogeology are really scarce. Mining and consultant companies are looking for talented groundwater modelers, and somehow there are not much modelers coming out from the universities.

 

 

 

How to be a senior hydrogeologist in 6 years

 

When I was in second semester of my master degree, the course director gave me this advice: “Learn MODFLOW and you will have a job”. That was a small and sincere advice that helped me on the last eight years as hydrogeologist – numerical modeler. Nowadays, I want to give the guidelines for the interested people of how to be a senior hydrogeologist in 6 years.

 

 

 

Tailing and waste dump seepage evaluation and remediation

 

Current and historical mining activities have a seepage and waste-dumps legacy that are the concern for mining companies, population and regulatory authorities. Old waste-dumps have not been regulated and most of the old tailings have been deposited in soils without covering. Tailing deposits and waste-dumps should be analyzed in a particular way because of the ground, instalation details, mineralized body geology, mined type, weather and other parameters.

 

 

To learn MODFLOW with MODEL MUSE

 

MODFLOW is the software for groundwater modeling developed by the USGS. The software is capable of representing conditions related to groundwater flow as evapotranspiration, recharge, drainage, river interaction among others. Its finite different approach gives the capability of calculating the flow regime with exceptional control on water budget discrepancy. 

Posted on October 2, 2013 and filed under Modeling.

 

 

Groundwater modeling of the Al Haza Oasis

The Kingdom of Saudi-Arabia, located in the central part of the Arabian Peninsula, is covered mostly by large deserts of rock and sand with low precipitation and a very arid climate. During the last 20 years a continuous increase in groundwater extraction has taken place due to industrial and agricultural activities.

 

 

Main predictive simulations for an EIA in mining

 

Impact assessment of mining projects on groundwater resources can be a challenging task due to uncertainty on groundwater flow regime, the complex numerical tools to successfully simulate stresses on groundwater resources posed by mining projects, and timeframe and budget of the EIAs.