Posts filed under Hydrogeology

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.

 

 

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.

 

 

 

Why is MODFLOW better than other softwares for groundwater modelling?

 

MODFLOW is the groundwater modelling software developed by the U.S. Geological Survey (USGS). It appeared in 1984 and has had a constant developement till now. MODFLOW's capacities allow the representation of regional or local groundwater flow and its interaction with superficial water bodies.

Posted on October 3, 2013 and filed under Hydrogeology, Modeling.

 

 

Isotope investigation for understanding groundwater flow regime

 

Environmental isotope investigation is a tool for understanding the regional groundwater flow and confirms or refutes the inferred relations between aquifers. Isotope investigation can give information about groundwater sources, ages, travel times and flow paths.

Posted on October 3, 2013 and filed under Hydrogeology.

 

 

Overview of the "Radius of Influence"

 

Since an homogenous aquifer was modelled, there is an interest in comparing the results with an analytical solution. Some formulas give the drawdown value into the well for a steady flow in confined and unconfined aquifers that are homogeneous, isotropic and infinite in the horizontal extent with a single full penetrating well.

Posted on October 2, 2013 and filed under Hydrogeology, Modeling.

 

 

Main factors affecting groundwater regime

The concept of a groundwater regime is based on the fact that the occurrence and distribution of groundwater is not merely a product of chance, but the result of a combination of climatic, hydrologic, geologic, topographic and soil-forming factors that together form an integrated dynamic system. These factors are interrelated in such a way that each provides some insight into the functioning of the total system and thus serves as an indicator of local conditions of groundwater occurrence and distribution (PAEL, 1993).

 

 

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.

 

 

Groundwater monitoring system implementation

A monitoring system is a platform where the level and quality records that describe groundwater resources are generated, made available and evaluated. These records are consistent, representative and long lasting. To manage the aquifer on a local or regional level it is required to have environmental managers with easy access to comprehensive, representative and reliable information.

 

 

Design and implementation of groundwater monitoring systems

 

A monitoring network is a system where the level and quality records that groundwater describes are generated, become available and are evaluated. These records are consistent, representative and long lasting. A monitoring network provides levels and quality data that can be used to answer different questions about water resources underground in a variety of regional and local scale.

Posted on October 1, 2013 and filed under Hydrogeology.