Assessing the importance of conduit geometry and physical parameters in karst systems using the storm water management model (SWMM), , Peterson Eric W. , Wicks Carol M. ,

SummaryQuestions about the importance of conduit geometry and about the values of hydraulic parameters in controlling ground-water flow and solute transport through karstic aquifers have remained largely speculative. One goal of this project was to assess the role that the conduit geometry and the hydraulic parameters have on controlling transport dynamics within karstic aquifers. The storm water management model (SWMM) was applied to the Devil's Icebox-Connor's Cave System in central Missouri, USA. Simulations with incremental changes to conduit geometry or hydraulic parameters were performed with the output compared to a calibrated baseline model. Ten percent changes in the length or width of a conduit produced statistically significant different fluid flow responses. The model exhibited minimal sensitivity to slope and infiltration rates; however, slight changes in Manning's roughness coefficient can highly alter the simulated output.Traditionally, the difference in flow dynamics between karstified aquifers and porous media aquifers has led to the idea that modeling of karst aquifers is more difficult and less precise than modeling of porous media aquifers. When evaluated against models for porous media aquifers, SWMM produced results that were as accurate (10% error compared to basecase). In addition, SWMM has the advantage of providing data about local flow. While SWMM may be an appropriate modeling technique for some karstic aquifers, SWMM should not be viewed as a universal solution to modeling karst systems

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Artesian Origina of Fissure Caves in Missouri. Reply, 1965, Brod, Langford G. , Jr.

Cutters and Pinnacles in Greene County, Missouri, 1965, Fellows, L. D.

Artesian Origina of Fissure Caves in Missouri. Discussion, 1965, Hedges, James

Geology of Carroll Cave, Camden County, Missouri, 1965, Helwig, James A.

Laboratory and field evidence for a vadose origin of foibe (domepits)., 1965, Reams Max W.

Foiba (plural, foibe) is a term derived from the northeastern Italian karst region. The word is here suggested for use in preference to other terms referring to vertical cavities in soluble rocks. Foiba is defined as a cavity in relatively soluble rock which is natural, solutional, tends toward a cylindrical shape, and possesses walls which normally approach verticality. In laboratory experiments, limestone blocks were treated with dilute hydrochloric acid, and cavities resembling foibe were produced. Vertical walls developed only when a less soluble layer capped the limestone block or when the acid source was stationary, allowing acid to drip to the area directly below. Water analyses from foibe in central Kentucky and Missouri indicate that the water has had less residence time in the zone of aeration than other waters percolating through the rocks and entering the caves. In central Kentucky, foibe seem to be developed by migrating underground waterfalls held up by less soluble layers or by water moving directly down joints below less soluble layers. In Missouri, foibe are formed by joint enlargement below chert layers. Those foibe in the ceilings of caves are complicated by the enlargement of the lower part of the joints by cave streams during fluctuating water table conditions. In limestone caves of Kansas, foibe are formed in a similar manner as in Missouri. The foibe of the gypsum caves of Kansas are formed mainly on the sides of steep collapse sinkholes and lack joint control although they form beneath less soluble layers in the gypsum. Dripping water is necessary for the development of vertical walls by solution. Less soluble layers seem to be the unique feature which allows water to drip and pour into foibe. The floors of foibe are formed by less soluble layers or near the water table. If foibe intersect previously formed cave passages, no floors may develop.

A Preliminary Investigation of a Pleistocene Vertebrate Fauna from Crankshaft Pit, Jefferson County, Missouri, 1967, Oesch, Ronald D.

Deposition of Calcite, Aragonite, and Clastic Sediments in a Missouri Cave During Four and One-Half Years, 1972, Reams, Max W.

Pleistocene Vertebrate Fauna of Bat Cave, Pulaski County, Missouri, 1973, Hawksley Oscar, Reynolds Jack F. , Foley Robert L.

Invertebrate Faunas of Caves to be Inudated by the Meramec Park Lake in Eastern Missouri, 1977, Craig, John L.

The geologic setting of the Southeast Missouri lead district; regional geologic history, structure and stratigraphy, 1977, Thacker J. L. , Anderson K. H. ,

Zoogeography and Evolution of the Subterranean Invertebrate Faunas of Illinois and Southeastern Missouri, 1978, Peck Stewart B. , Lewis Julian J.

Phosphate Minerals in Low Water Bridge Cave Greene County, Missouri, 1983, Reams, Max W.

Physical arrangement of high-alumina clay types in a Missouri clay deposit and implications for their genesis, 1983, Keller W. D. , Stevens R. P. ,