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Browsing by Author "Choi, Jane, committee member"

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    Peter Village and the delineation of space: new research at an unusual enclosure in central Kentucky
    (Colorado State University. Libraries, 2021) DeSanto, Carly M., author; Henry, Edward R., advisor; Van Buren, Mary, committee member; Choi, Jane, committee member; Carman, Scott, committee member
    After over a century of research, archaeologists still identify one of the most important characteristics of the Early and Middle Woodland Period in the Middle Ohio Valley region as the construction, maintenance, and use of small geometric ditch-and-embankment earthen enclosures. However, the Peter Village site (15Fa166), located in Fayette County, Kentucky, is a ditch-and-embankment earthen enclosure that is both non-geometric and unusually large. Past archaeological summaries of Peter Village have classified it as an example of a non-mortuary site in the region, though its exact purpose remains unknown. Recent archaeological research I conducted on this atypical enclosure includes analyses of LiDAR-derived topographic visualizations, subsurface geophysical surveys, soil cores, and the construction of a new radiocarbon chronology that employs Bayesian statistical modeling. The result of my work provides new insights into the delineation of space at Peter Village. My data indicate that a second, previously undefined, embankment likely exists exterior to the ditch. There is also evidence from my geophysical imagery that shows the enclosure's entrance and associated linear features in the southern, interior portion of the site. Finally, new radiocarbon data suggests that Peter Village is potentially one of the earliest examples of a ditch-and-embankment enclosure in the Middle Ohio Valley region. Using these new diverse datasets collected via multiple geoarchaeological methods, I argue that enclosure features like those present at Peter Village require us to reconsider their early monumental nature. Moreover, the identification of multiple embankments forces us to reconsider changes in the delineation of space at the site. Peter Village serves as an important example of how a multi-scalar archaeological investigation can expand upon previous archaeological research.
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    Quantitative analysis of runoff in green roof structures in the Colorado Front Range
    (Colorado State University. Libraries, 2023) Salerno, Amanda, author; Bousselot, Jennifer, advisor; Choi, Jane, committee member; Sharvelle, Sybil, committee member
    The green roof capacity of retaining rainwater extends the runoff duration further than the actual rain event, releasing part of it slowly into the drainage system and positively impacting it. However, the volumes will depend on the size of the rainfall event and the green roof design. Therefore, specific attention should be paid when designing a new green roof project, like geographic locations, materials peculiarities, and the project's needs, including biotic and abiotic design components. The need for more local data regarding this analysis in Western North America is still significant. Therefore, this study aims to analyze the impact of three different green roof systems on Colorado's climate by reduction of runoff, retention volume, and runoff coefficient. Moreover, we aim to analyze plant health and substrate moisture retention and components for better water capture. To achieve the goals outlined, three different green roofs technologies, with different retention and detention layers technologies, and a control roof, a conventional low slope roof for comparison, are placed at Colorado State University in Fort Collins, Colorado, United States; the systems include a Sempergreen Purple Roof, a Sempergreen Sponge Roof, and a Green Roof Technology with an Extenduct Drainage System; all were vegetated with Sedum mats, base slopes of 1% toward the rooftop drain, and measuring 1m x 2m. The drainage systems in each green roof were designed to test performance under steady, low-intensity, high-intensity, short-duration, and long-duration rainfall conditions and simulated rain events. All the systems have the same drain system connected to a v-notch weir. Volume, speed, and time were measured to quantify the runoff from all roof systems. Our data suggests that green roof volume capture varies with preexisting substrate moisture conditions, frequency and size of storms, and drainage layer components. Green Roof Technology with an Extenduct Drainage System and Sponge Roof had the best volume retention in less intense, more frequent, and back-to-back rainfall events. On the other hand, Purple Roof performed better for larger rain events that might lead to flooding and urban drainage concerns in cities. Ultimately, the Colorado-specific data from this study will enable the intentional design of green roofs to optimize plant health and water management.