Modeling Sediment Yield in the Sink Creek and Purgatory Creek Watersheds Near San Marcos, Texas

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dc.contributor.advisorMeitzen, Kimberly
dc.contributor.authorAndresen, David A.
dc.contributor.committeeMemberChow, Edwin
dc.contributor.committeeMemberWeaver, Russell
dc.date.accessioned2018-01-10T19:09:08Z
dc.date.available2018-01-10T19:09:08Z
dc.date.issued2017-12
dc.description.abstractCentral Texas, along the Balcones escarpment, experiences high-magnitude precipitation events that have the ability to generate large amounts of runoff. In the past, such events have led to significant urban flooding and have devastated entire communities. In an effort to lessen the severity of such flood events, the city of San Marcos, Texas, with the National Resource Conservation Service, constructed five flood control dams. These dams, located in the headwaters of the San Marcos River, as well as one of its tributaries, have been successful in protecting the city from catastrophic flood events. Due to an increase in urbanization in the region, rainfall runoff modeling has been suggested in order to better understand the hydrologic processes occurring in these watersheds. This study used the Soil and Water Assessment Tool (SWAT) to model and compare sediment yield for Sink Creek and Purgatory Creek watersheds. This comparison allows a better understanding of which variables are more important to soil erosion. Results show that Sink Creek watershed has a higher total sediment yield (t), while Purgatory Creek watershed has a higher specific sediment yield (t/ha). Soil type and land use were found to be the best predictors of erosion. Results also showed that the top 25 percent of the highest total monthly precipitation produced greater than 55 percent of the overall sediment yield during the period of observation.
dc.description.departmentGeography and Environmental Studies
dc.formatText
dc.format.extent88 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationAndresen, D. A. (2017). Modeling sediment yield in the Sink Creek and Purgatory Creek watersheds near San Marcos, Texas (Unpublished thesis). Texas State University, San Marcos, Texas.
dc.identifier.urihttps://hdl.handle.net/10877/6929
dc.language.isoen
dc.subjectSWAT
dc.subjectSan Marcos
dc.subjectsediment yield
dc.subjectSUFI-2
dc.subjecthydrology
dc.subjectPurgatory Creek
dc.subjectSink Creek
dc.subjectphysical geography
dc.subjectGIS
dc.titleModeling Sediment Yield in the Sink Creek and Purgatory Creek Watersheds Near San Marcos, Texas
dc.typeThesis
thesis.degree.departmentGeography
thesis.degree.disciplineGeography
thesis.degree.grantorTexas State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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