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| Titel |
Flow partitioning and unstable divergence in fluviokarst evolution in central Kentucky |
| VerfasserIn |
J. D. Phillips, M. D. Walls |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 11, no. 3 ; Nr. 11, no. 3 (2004-08-20), S.371-381 |
| Datensatznummer |
250009242
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| Publikation (Nr.) |
 copernicus.org/npg-11-371-2004.pdf |
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| Zusammenfassung |
| In fluviokarst landscapes flow may be partitioned into
its surface and subsurface components as well as into diffuse and
concentrated flow. The competition among these is hypothesized to be
responsible for the divergence of the landscape in a fluviokarst region of
central Kentucky into depression-rich, unchannelled karst-rich and
channel-poor (KRCP) and strongly fluvially dissected channel-rich karst-poor
(CRKP) zones. The interrelationships between diffuse surface runoff,
channelized surface flow, diffuse recharge, and point recharge are
dynamically unstable and chaotic, implying that small changes in the
partitioning are likely to have disproportionately large and long-lived
impacts, reflected in geomorphology. In the Kentucky River gorge, rapid
Quaternary incision has resulted in local slope changes which should induce
instability in the flow partitioning system. A GIS-based landscape
classification scheme showed that there is a relationship between slope
gradients and the degree of karstification or fluvial dissection. Geomorphic
interpretation of landforms in the river gorge area indicates that CRKP and
KRCP zones are growing at the expense of other landscape classes. This
results in an increase in Kolmogorov entropy, a characteristic of a
dynamically, unstable, chaotic system. Results support the hypothesis that
divergent landscape evolution is linked to the complex nonlinear dynamics of
low partitioning. |
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