Early development of karst aquifers on percolation networks of fractures in limestone.


Material Information

Early development of karst aquifers on percolation networks of fractures in limestone.
Series Title:
Water Resources Research
Siemers, Jörg
Dreybrodt, Wolfgang
John Wiley and Sons
Publication Date:


serial ( sobekcm )


We have modeled flow and dissolution processes within percolation networks representing stochastic primary fracture systems in limestone. At the beginning of karstification, flow is evenly distributed on all fractures available. As the system develops by dissolutional widening of the fractures, preferred flow pathways evolve, which attract more and more flow, until at breakthrough the total flow rate increases dramatically. These breakthrough times have been investigated with regard to their dependence on the initial fracture aperture width, the dimension of the evolving karst aquifer, hydraulic gradients, connectivity of the percolation network, and the chemical parameters, such as higher‐order rate constants and exponents, and equilibrium concentration. They exhibit a behavior similar to that of breakthrough times for one‐dimensional conduits [Dreybrodt, 1996]. Our results show that the structure of the evolving karst aquifer is determined by the initial geological setting. However, the final conduits are selected from competing pathways with potential breakthrough times close to each other, whereby the details of the distribution of undersaturation with respect to calcite play an important role.
Original Version:
Water Resources Research, Vol. 34, no. 3 (1998-03-01).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

USFLDC Membership

University of South Florida
Karst Information Portal

Postcard Information



Download Options


No images or PDF downloads are available for this resource.

Cite this item close


Cras ut cursus ante, a fringilla nunc. Mauris lorem nunc, cursus sit amet enim ac, vehicula vestibulum mi. Mauris viverra nisl vel enim faucibus porta. Praesent sit amet ornare diam, non finibus nulla.


Cras efficitur magna et sapien varius, luctus ullamcorper dolor convallis. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Fusce sit amet justo ut erat laoreet congue sed a ante.


Phasellus ornare in augue eu imperdiet. Donec malesuada sapien ante, at vehicula orci tempor molestie. Proin vitae urna elit. Pellentesque vitae nisi et diam euismod malesuada aliquet non erat.


Nunc fringilla dolor ut dictum placerat. Proin ac neque rutrum, consectetur ligula id, laoreet ligula. Nulla lorem massa, consectetur vitae consequat in, lobortis at dolor. Nunc sed leo odio.