Field scale longitudinal dispersivities estimation in a karstic aquifer
by Rafael Casáres-Salazar; Roger González-Herrera; Eduardo Graniel-Castro
International Journal of Water (IJW), Vol. 7, No. 1/2, 2013

Abstract: To simulate contaminant advective transport it is required to provide dispersivity values to the models, values that are unknown in many cases. In this paper a methodology is presented to estimate longitudinal dispersivities at field scale, based on the monitoring of groundwater quality at an unconfined aquifer that is below a waste disposal site with no liners for groundwater protection, and by applying a one-dimensional advective transport model. Chloride was used as a tracer, which is known to be present in dump site leachates. As part of the results, an equation was obtained that relates longitudinal dispersivity against the observation scale for the unconfined karstic aquifer of Yucatan, México. Some scenarios were employed for the longitudinal dispersivity estimation and for the solute transport simulation. In this way, a sensitivity analysis was performed to calculate the longitudinal dispersivities by varying the hydraulic conductivity and the hydraulic gradient. As a simulation exercise, a sensitivity analysis was also carried out to calculate the travel time that a particle would require to reach a certain distance depending on the longitudinal dispersivity value.

Online publication date: Tue, 21-Oct-2014

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Water (IJW):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?


Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com