Understanding gully process in two Kansas landscapes

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dc.contributor.author Burke, Katherine J. en_US
dc.date.accessioned 2015-07-20T15:57:50Z
dc.date.available 2015-07-20T15:57:50Z
dc.date.issued 2015-08-01 en_US
dc.identifier.uri http://hdl.handle.net/2097/20102
dc.description.abstract Gullies often form as a result of land use changes and associated factors such as soil compaction, vegetation removal and changes in rainwater infiltration. Gully erosion creates human safety hazards, soil loss, and sediment and nutrient pollution downstream. Across the globe, researchers have found a wide variety of gully growth rates and drivers (Poesen, Nachtergaele, Verstraeten, & Valentin, 2003), but after the late 1900s, very few published gully studies have been done in the United States, and fewer studies have been done in the Midwest and Great Plains regions. This gully study was conducted in two heavily-used Kansas landscapes: Fort Riley military training areas and agricultural fields in McPherson County. The purpose of the study was to quantitatively measure rates and patterns of gully erosion, as well as identify main drivers of gully initiation and growth. Results and conclusions add Kansas gully characteristics to the growing knowledge of gully erosion in other areas of the world. Gullies in both landscapes were surveyed in the field multiple times per year over three consecutive years (2012-2014) to capture patterns and rates of change. Rainfall data and land characteristics such as soils, vegetative cover, slope, and drainage area were compiled into a database to be compared to gully erosion rates in an attempt to correlate gully erosion not only to rainfall but to other land-based factors. Results show that for most Fort Riley gullies, beds are filling and banks are widening, and consistent drivers of erosion could not be determined from the data. In McPherson, gully channels are storing large amounts of sediment, though gully networks in the upper areas of the gully channels are actively widening and advancing headward. Drivers of channel change in McPherson County seem to be related to vegetative cover, slope, and early spring freeze/thaw processes. At both study locations, land use changes related to linear disturbance and reduced vegetative cover are suspected to have more of an influence on gully growth than rainfall events during the study timeframe. Objectives for best management practices are proposed for both Fort Riley and McPherson County. en_US
dc.description.sponsorship National Institute of Food and Agriculture; Conservation Innovation Grant through the Natural Resource Conservation Service; Great Plains Cooperative Ecosystems Studies Unit Agreement No./ W9132T-11-2-0012 en_US
dc.language.iso en_US en_US
dc.publisher Kansas State University en
dc.subject Gully erosion en_US
dc.subject Soil conservation en_US
dc.subject Agriculture en_US
dc.subject Kansas en_US
dc.subject Fort Riley en_US
dc.title Understanding gully process in two Kansas landscapes en_US
dc.type Dissertation en_US
dc.description.degree Doctor of Philosophy en_US
dc.description.level Doctoral en_US
dc.description.department Department of Environmental Design and Planning Program en_US
dc.description.advisor Tim Keane en_US
dc.subject.umi Natural Resource Management (0528) en_US
dc.date.published 2015 en_US
dc.date.graduationmonth August en_US

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