Formed in 2009, the Archive Team (not to be confused with the archive.org Archive-It Team) is a rogue archivist collective dedicated to saving copies of rapidly dying or deleted websites for the sake of history and digital heritage. The group is 100% composed of volunteers and interested parties, and has expanded into a large amount of related projects for saving online and digital history.
History is littered with hundreds of conflicts over the future of a community, group, location or business that were "resolved" when one of the parties stepped ahead and destroyed what was there. With the original point of contention destroyed, the debates would fall to the wayside. Archive Team believes that by duplicated condemned data, the conversation and debate can continue, as well as the richness and insight gained by keeping the materials. Our projects have ranged in size from a single volunteer downloading the data to a small-but-critical site, to over 100 volunteers stepping forward to acquire terabytes of user-created data to save for future generations.
The main site for Archive Team is at archiveteam.org and contains up to the date information on various projects, manifestos, plans and walkthroughs.
This collection contains the output of many Archive Team projects, both ongoing and completed. Thanks to the generous providing of disk space by the Internet Archive, multi-terabyte datasets can be made available, as well as in use by the Wayback Machine, providing a path back to lost websites and work.
Our collection has grown to the point of having sub-collections for the type of data we acquire. If you are seeking to browse the contents of these collections, the Wayback Machine is the best first stop. Otherwise, you are free to dig into the stacks to see what you may find.
The Archive Team Panic Downloads are full pulldowns of currently extant websites, meant to serve as emergency backups for needed sites that are in danger of closing, or which will be missed dearly if suddenly lost due to hard drive crashes or server failures.
Ciclo hidrologico
Importancia del agua subterránea en el mundo
Explotacion del agua subterránea en Colombia
Clasificación de acuiferos
Pozos artesianos
Nivel freatico
Nivel piezometrico
inyección de agua
Repaso
ACUÍFEROS :
La palabra acuífero proviene del latín fero, que significa llevar. En términos geológicos es una formación rocosa que contiene agua en cantidad apreciable y que permite que circule a través de ella con facilidad.
Un ACUÍFERO es aquel estrato o formación geológica que permite la circulación del agua por sus poros y/o grietas.
dentro de estas formaciones podemos encontrarnos con materiales muy variados como gravas de río, calizas muy agrietadas, areniscas porosas poco cementadas, arenas de playa, algunas formaciones volcánicas, depósitos de dunas e incluso ciertos tipos de arcilla. El nivel superior del agua subterránea se denomina tabla de agua, y en el caso de un acuífero libre, corresponde al nivel freático.
La porosidad es la propiedad de las rocas que hace que puedan contener agua. Para que una roca sea acuífera, además de almacenar agua debe ser capaz de cederla. Esta propiedad se conoce como permeabilidad. Por tanto, permeabilidad y porosidad definen las características hidráulicas de un acuífero.
La recarga de acuíferos se produce de forma natural por infiltración del agua de lluvia que cae sobre ellos, de los ríos o los lagos que los atraviesan o limitan, o del excedente de agua de los cultivos asentados sobre ellos.