An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data
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| Language: | English |
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University of Akron / OhioLINK
2008
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=akron1221760340 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-akron1221760340 |
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oai_dc |
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NDLTD |
| language |
English |
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NDLTD |
| topic |
Archaeology Civil Engineering Earth Ecology Environmental Engineering Environmental Science Geochemistry Geography Geology Geophysics Geotechnology Hydrology Paleoecology Petroleum Production Caves cave surveying cave volume Scott Hollow Cave Snedegar's Cave karst carbonate bedrock West Virginia |
| spellingShingle |
Archaeology Civil Engineering Earth Ecology Environmental Engineering Environmental Science Geochemistry Geography Geology Geophysics Geotechnology Hydrology Paleoecology Petroleum Production Caves cave surveying cave volume Scott Hollow Cave Snedegar's Cave karst carbonate bedrock West Virginia Pachos, Alexander An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data |
| author |
Pachos, Alexander |
| author_facet |
Pachos, Alexander |
| author_sort |
Pachos, Alexander |
| title |
An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data |
| title_short |
An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data |
| title_full |
An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data |
| title_fullStr |
An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data |
| title_full_unstemmed |
An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data |
| title_sort |
empirical study of cave passage dimensions using augmented radial and longitudinal survey data |
| publisher |
University of Akron / OhioLINK |
| publishDate |
2008 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=akron1221760340 |
| work_keys_str_mv |
AT pachosalexander anempiricalstudyofcavepassagedimensionsusingaugmentedradialandlongitudinalsurveydata AT pachosalexander empiricalstudyofcavepassagedimensionsusingaugmentedradialandlongitudinalsurveydata |
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1719419965360046080 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-akron12217603402021-08-03T05:25:36Z An Empirical Study of Cave Passage Dimensions Using Augmented Radial and Longitudinal Survey Data Pachos, Alexander Archaeology Civil Engineering Earth Ecology Environmental Engineering Environmental Science Geochemistry Geography Geology Geophysics Geotechnology Hydrology Paleoecology Petroleum Production Caves cave surveying cave volume Scott Hollow Cave Snedegar's Cave karst carbonate bedrock West Virginia <p>This experiment evaluated the spatial data requirements necessary to achieve a high degree of accuracy when calculating cave passage volume. In this study a series of cave passage surveys were performed, and the data were then analyzed to determine the effect additional data on accurate calculations of cross-sectional areas and volumes in cave passages. It was hypothesized that the accuracy of area and volume calculations would increase as data points were added to a given survey and conversely that accuracy would decrease as data points were removed. Survey stations were closely spaced along a longitudinal transect in each of the studied cave passage segments. At each station a radial survey of a cross-sectional slice of cave passage was made using a tripod-mounted laser rangefinder, that rotated to predetermined angular stops, in a plane roughly normal to the longitudinal axis of the passage. The sequence of cross-sectional slices divided the passage into segments or slabs of space whose volumes could then be calculated as irregular cylinders.</p><p>Four cave passage transects from two caves in the West Virginia Appalachian Plateau were surveyed. At each station there were 32 cross-sectional radial measurements made, creating a total of 2,688 data points for the study The purpose of using closely spaced survey stations and 32 radial points to gather the data was to create a dense data point calculations. After the full data sets were analyzed, data were selectively deleted to examine whether there was a point of diminishing returns for the amount of data necessary to make reasonably accurate volume calculations. Some aspects of the data deletion exercise simulated the type of data that would be collected with traditional cave surveying techniques that use distantly spaced survey stations and LRUD (Left, Right, Up, Down) cross-sectional measurements.</p><p>The results revealed that increasing both longitudinal data and radial data does increase the accuracy of volume calculations. However, it was also found there is a qualitative difference between radial and longitudinal data, in the contribution to accurate volume calculations. In three of the four studied cave passages, an increase in data points resulting from an addition of stations but a simultaneous deletion of radial points actually decreased the accuracy of the volume calculations. In the fourth cave passage there was no recognizable difference between the contributions of the radial and longitudinal data. Nevertheless, volume calculations made using depleted data sets never varied from those of the complete data sets by more than ~22%, irrespective of the data type. Therefore, measurements made using traditional cave surveying techniques are well with an order of magnitude for accuracy.</p><p>Cross-sectional area calculations made using depleted radial data showed much more variability than the volume calculations. However, the area calculations made using depleted radial data never varied from the 32 radial point calculations by more than ~ 40 percent. </p><p>The value of this experiment for cave surveyors and those researchers who use their data is that it provides a starting point for determining how much survey data may be needed to meet particular project requirements.</p> 2008 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1221760340 http://rave.ohiolink.edu/etdc/view?acc_num=akron1221760340 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |