Alexander Ifeanyichukwu Opara

15 Questions 15 Answers 0 Followers

Questions related from Alexander Ifeanyichukwu Opara

Is there any known methodology for evaluating aquifer vulnerability/protective capacity directly from geophysical methods?

I am working on possible contamination of shallow unconfined aquifers from surface anthropogenic factors, and I am in need of any possible documented methods for estimating aquifer vulnerability...

10 September 2016 1,427 11 View

What are the possible pitfalls and challenges of curie points isotherm estimation from magnetic data?

I am currently working on estimation of heat flow and geothermal regime of a basin using high resolution aeromagnetic data.I am also estimating the depth to the magnetic basement from 3-d euler...

06 February 2016 1,178 2 View

Can someone help me with a simple methodology for modelling of possible leachate contamination from a dumpsite?

I am currently working on possible contamination of a shallow unconfined aquifer from a municipal solid waste dumpsite. I am using both geophysical and geochemical data and I hope to model...

06 February 2016 8,718 3 View

Which method or methods can I use to study saline water intrusion in a coastal area?

I am currently working on the problem of saline water intrusion into fresh water bearing zones in coastal aquifers. I have already acquired some geoelectrical and geochemical data from wells...

18 October 2015 5,846 8 View

What is the direct application of the wind rose diagram in studying atmospheric dispersion of air pollutants?

I collected ambient air quality data from the field using digital gas monitors. I also collected a set of meoteorological data at points where air qaulity data was collected.However, I am...

15 October 2015 1,147 8 View

Can tectonism or neo-tectonism be considered as a factor that can initiate or propagate deep gullies?

Just thinking aloud!Most deep gully erosion sites in southestern Nigeria seem to be located in a zone that is approximately in a straight line. Similarly, their trends seem to be mostly in the...

11 March 2015 1,539 5 View

What is the effect of meteorological parameters on ambient air quality particularly with respect to aerosols and fugitive gases?

I have been collecting air quality data for over two years varying from one season to another. There seem to be some spatio-temporal variations of the measured data. I need additional information...

20 June 2014 4,413 3 View

Is there some generally accepted range of residual gravity/magnetic values associated with mineralization ?

Most models tend to make indirect deductions and I am only hoping that perhaps there are more direct explanation.

03 April 2014 7,242 5 View

What exactly is the advantage of the dipole-dipole array over other electrical resistivity arrays?

Since there are several arrays, with the Schlumberger and Wenner mostly used, I wish to know if there is any special application of the dipole-dipole array.

08 March 2014 5,347 21 View

Can anyone help me with a standard workflow on how to run reduction to equator Euler and Wenner deconvolution using Oasis Montaj Software?

I am having some challenges with running those modules on Oasis Montaj.

08 March 2014 8,136 1 View

What is the best method to approach the effect of leachate contamination of groundwater from an open solid dump-site?

Some shallow water boreholes penetrated in clean sands that are close to a dumpsite were observed to have some black precipitous sediments.

08 March 2014 1,145 7 View

What is the possible interpretation of measured negative resistance values?

I went to the field with two different resistivity meters (OHMEGA and ABEM Terrameter SAS 4000) and recorded negative resistance values from a particular subsurface interval.

08 March 2014 354 16 View

How can one solve the problem of ''blind zone'' in seismics? How can one know of a blind zone in advance?

Sometimes in geophysics and seismic method in particular, some very thin layers may not be detected from seismic surveys leading to wrong geological interpretations.

08 March 2014 5,543 7 View

What is the best theory/technique that can be used to explain artesian flow from artisan aquifers?

I am trying to find out the origin of artesian (groundwater) flow from a localized belt within a geologic basin in southeastern Nigeria.

11 September 2013 7,380 2 View

Are there any known pitfalls associated with contaminant migration pathways in groundwater using MODFLOW/MODPATH?

I am currently working on contaminant migration from an unprotected municipal dumpsite. I hope to carry out both forward and inverse modelling of the lechate for a minimum of 25 years. Are there...

01 January 1970 9,086 3 View